{"id":3754,"date":"2026-03-27T06:58:21","date_gmt":"2026-03-27T06:58:21","guid":{"rendered":"https:\/\/nbaem.com\/?p=3754"},"modified":"2026-03-22T08:28:40","modified_gmt":"2026-03-22T08:28:40","slug":"permanent-magnetic-material-brittleness","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/permanent-magnetic-material-brittleness\/","title":{"rendered":"V\u1eadt li\u1ec7u t\u1eeb tr\u01b0\u1eddng v\u0129nh vi\u1ec5n gi\u00f2n, nguy\u00ean nh\u00e2n v\u00e0 gi\u1ea3i ph\u00e1p"},"content":{"rendered":"<h2>B\u1ea3n Ch\u1ea5t Khoa H\u1ecdc \u0110\u1eb1ng Sau T\u00ednh Gi\u00f2n C\u1ee7a V\u1eadt Li\u1ec7u Nam Ch\u1eadn V\u0129nh C\u1eedu<\/h2>\n<p>C\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng h\u1ecfi ch\u00fang t\u00f4i t\u1ea1i sao nam ch\u00e2m hi\u1ebfm hi\u1ec7u su\u1ea5t cao l\u1ea1i d\u1ec5 b\u1ecb s\u1ee9t m\u1ebb ho\u1eb7c v\u1ee1 tan so v\u1edbi th\u00e9p\u69cb c\u1ea5u tr\u00fac khi thi\u1ebft k\u1ebf c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ed9ng c\u01a1 then ch\u1ed1t ho\u1eb7c robot ch\u00ednh x\u00e1c, hi\u1ec3u bi\u1ebft <strong>t\u00ednh gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> kh\u00f4ng th\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng. Trong 14 n\u0103m kinh nghi\u1ec7m thi\u1ebft k\u1ebf t\u1ea1i NBAEM, ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y s\u1ef1 mong manh c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t khuy\u1ebft \u0111i\u1ec3m\u2014n\u00f3 ch\u1ec9 l\u00e0 v\u1eadt l\u00fd.<\/p>\n<h3>h\u1ee3p ch\u1ea5t nam ch\u00e2m intermetall\u00edc v\u00e0 c\u1ea5u tr\u00fac tinh th\u1ec3<\/h3>\n<p>C\u00e1c nam ch\u00e2m hi\u1ebfm \u0111\u1ea5t \u0111\u01b0\u1ee3c nung d\u00ednh l\u00e0 c\u01a1 b\u1ea3n l\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t intermetall\u00edc. Kh\u00e1c v\u1edbi kim lo\u1ea1i th\u00f4ng th\u01b0\u1eddng c\u00f3 th\u1ec3 ch\u1ecbu u \u0111\u1ea9y u\u1ed1n cong d\u01b0\u1edbi \u00e1p l\u1ef1c, m\u1ea1ng tinh th\u1ec3 c\u1ee7a nh\u1eefng nam ch\u00e2m n\u00e0y v\u1ed1n thi\u1ebfu kh\u1ea3 n\u0103ng d\u1eddi h\u00ecnh plastic.<\/p>\n<ul>\n<li><strong>\u0110i\u1ec3m Y\u00eau C\u1ea5p Kh\u00f4ng:<\/strong> Khi c\u00f3 va \u0111\u1eadp c\u01a1 h\u1ecdc x\u1ea3y ra, v\u1eadt li\u1ec7u kh\u00f4ng th\u1ec3 h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng b\u1eb1ng c\u00e1ch u\u1ed1n cong ho\u1eb7c b\u1ebb cong.<\/li>\n<li><strong>Ph\u00e1 H\u1ecfng Ngay L\u1eadp T\u1ee9c:<\/strong> V\u00ec li\u00ean k\u1ebft nguy\u00ean t\u1eed c\u1ee9ng kh\u00f4ng th\u1ec3 k\u00e9o d\u00e0i, ch\u00fang ch\u1ec9 g\u00e3y. C\u1ea5u tr\u00fac tinh th\u1ec3 c\u1ee9ng nh\u1eafc n\u00e0y d\u1eabn \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n g\u00e3y c\u1ee7a nam ch\u00e2m c\u1ef1c k\u1ef3 th\u1ea5p so v\u1edbi kim lo\u1ea1i s\u1ea3n xu\u1ea5t th\u00f4ng th\u01b0\u1eddng.<\/li>\n<\/ul>\n<h3>\u1ee8ng Su\u1ea5t N\u1ed9i C\u1ee7a Luy\u1ec7n Kim B\u1ed9t<\/h3>\n<p>Qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng \u0111\u1ec9nh cao v\u00f4 t\u00ecnh t\u1ea1o ra nh\u1eefng l\u1ed7 h\u1ed5ng c\u1ea5u tr\u00fac. Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng luy\u1ec7n kim b\u1ed9t ti\u00ean ti\u1ebfn \u0111\u1ec3 c\u0103n ch\u1ec9nh mi\u1ec1n t\u1eeb, nh\u01b0ng c\u00e1c \u0111\u00e1nh \u0111\u1ed5i v\u1eadt l\u00fd l\u00e0 kh\u00f4ng th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c:<\/p>\n<ul>\n<li><strong>\u00c9p V\u00e0 Nung K\u1ebft:<\/strong> \u00c9p n\u00e9n b\u1ed9t kim lo\u1ea1i ultra-fine d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t c\u1ef1c cao t\u1ef1 \u0111\u1ed9ng kh\u00f3a l\u1ea1i <strong>\u0111i\u1ec7n ph\u00e2n metallurgic b\u1ed9t n\u1ed9i sinh<\/strong> khi v\u1eadt li\u1ec7u ngu\u1ed9i v\u00e0 \u0111\u00f4ng \u0111\u1eb7c.<\/li>\n<li><strong>Khe h\u1edf vi m\u00f4:<\/strong> Qu\u00e1 tr\u00ecnh nung k\u1ebft \u0111\u1ec3 l\u1ea1i c\u00e1c ch\u1ed7 tr\u1ed1ng vi m\u00f4 r\u1ea3i r\u00e1c trong c\u01a1 th\u1ec3 c\u1ee7a nam ch\u00e2m. Nh\u1eefng kho\u1ea3ng tr\u1ed1ng nh\u1ecf n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u0111i\u1ec3m t\u1eadp trung \u1ee9ng su\u1ea5t n\u1ed9i t\u1ea1i, l\u00e0m cho v\u1eadt li\u1ec7u d\u1ec5 b\u1ecb s\u1ee9t m\u1ebb v\u00e0 n\u1ee9t d\u01b0\u1edbi t\u1ea3i tr\u1ecdng v\u1eadt l\u00fd.<\/li>\n<\/ul>\n<h3>\u1ee8ng su\u1ea5t nhi\u1ec7t v\u00e0 n\u1ee9t vi m\u00f4<\/h3>\n<p>Nam ch\u00e2m hi\u1ebfm hi\u1ebfm khi v\u1eadn h\u00e0nh trong \u0111i\u1ec1u ki\u1ec7n ho\u00e0n h\u1ea3o, \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t kh\u00ed h\u1eadu. Nh\u1eefng bi\u1ebfn \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan l\u00e0 m\u1ed1i \u0111e d\u1ecda ch\u00ednh \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n c\u1ee7a nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm. S\u1ef1 d\u1ecbch chuy\u1ec3n nhanh t\u1eeb n\u00f3ng sang l\u1ea1nh khi\u1ebfn c\u00e1c l\u1edbp ngo\u00e0i c\u1ee7a nam ch\u00e2m n\u1edf ra ho\u1eb7c co l\u1ea1i v\u1edbi t\u1ed1c \u0111\u1ed9 kh\u00e1c bi\u1ec7t so v\u1edbi l\u00f5i \u1edf gi\u1eefa d\u00e0y \u0111\u1eb7c h\u01a1n. V\u00ec v\u1eadt li\u1ec7u kh\u00f4ng th\u1ec3 k\u00e9o gi\u00e3n, s\u1ef1 co gi\u00e3n nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u n\u00e0y bu\u1ed9c m\u1ea1ng tinh th\u1ec3 ph\u1ea3i t\u1ef1 x\u00e9 r\u00e1ch. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra c\u00e1c n\u1ee9t vi m\u00f4 v\u00f4 h\u00ecnh s\u00e2u b\u00ean trong th\u00e0nh ph\u1ea7n. Theo th\u1eddi gian, nh\u1eefng l\u1ed7i vi m\u00f4 n\u00e0y l\u00e0m suy y\u1ebfu t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac, d\u1eabn \u0111\u1ebfn c\u00e1c s\u1ef1 c\u1ed1 b\u1ea5t ng\u1edd v\u00e0 t\u1ed1n k\u00e9m trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh \u1edf t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c khi l\u1eafp r\u00e1p.<\/p>\n<h2>S\u1ef1 gi\u00f2n \u1edf c\u00e1c v\u1eadt li\u1ec7u t\u1eeb t\u00ednh kh\u00e1c nhau<\/h2>\n<p>Khi ch\u00fang ta thi\u1ebft k\u1ebf c\u00e1c gi\u1ea3i ph\u00e1p t\u1eeb t\u00ednh cho th\u1ecb tr\u01b0\u1eddng to\u00e0n c\u1ea7u, ch\u00fang ta lu\u00f4n ph\u1ea3i c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ea7u ra t\u1eeb t\u00ednh v\u00e0 <strong>t\u00ednh gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu<\/strong>. H\u1ea7u h\u1ebft c\u00e1c nam ch\u00e2m c\u1ee9ng v\u1ed1n d\u0129 d\u1ec5 v\u1ee1, nh\u01b0ng m\u1ee9c \u0111\u1ed9 gi\u00f2n c\u1ee5 th\u1ec3 bi\u1ebfn \u0111\u1ed5i r\u1ea5t nhi\u1ec1u d\u1ef1a v\u00e0o h\u1ee3p kim v\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t.<\/p>\n<h3>B\u1ea3ng so s\u00e1nh: T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u1eadt li\u1ec7u l\u00f5i<\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch nhanh v\u1ec1 c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u t\u1eeb t\u00ednh th\u01b0\u01a1ng m\u1ea1i kh\u00e1c nhau x\u1eed l\u00fd \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc:<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">V\u1eadt li\u1ec7u t\u1eeb<\/th>\n<th style=\"text-align: left;\">M\u1ee9c \u0111\u1ed9 gi\u00f2n<\/th>\n<th style=\"text-align: left;\">\u0110\u1ed9 b\u1ec1n n\u1ee9t c\u1ee7a nam ch\u00e2m<\/th>\n<th style=\"text-align: left;\">\u0110\u1eb7c tr\u01b0ng c\u01a1 h\u1ecdc ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Neodymium Sintered (NdFeB)<\/strong><\/td>\n<td style=\"text-align: left;\">Cao<\/td>\n<td style=\"text-align: left;\">Th\u1ea5p<\/td>\n<td style=\"text-align: left;\">S\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng l\u1edbn, nh\u01b0ng r\u1ea5t d\u1ec5 b\u1ecb s\u1ee9t m\u1ebb khi va \u0111\u1eadp.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Cobalt Samari (SmCo)<\/strong><\/td>\n<td style=\"text-align: left;\">C\u1ef1c k\u1ef3<\/td>\n<td style=\"text-align: left;\">R\u1ea5t th\u1ea5p<\/td>\n<td style=\"text-align: left;\">\u1ed4n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 \u0111\u1eb7c bi\u1ec7t, nh\u01b0ng n\u1ed5i ti\u1ebfng l\u00e0 k\u00e9m gi\u00f2n nh\u1ea5t.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ferrite (G\u1ed1m)<\/strong><\/td>\n<td style=\"text-align: left;\">Cao<\/td>\n<td style=\"text-align: left;\">Th\u1ea5p<\/td>\n<td style=\"text-align: left;\">R\u1ea5t gi\u00f2n; n\u1ee9t v\u1ee1 d\u01b0\u1edbi \u00e1p l\u1ef1c gi\u1ed1ng nh\u01b0 g\u1ed1m th\u00f4ng th\u01b0\u1eddng.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>AlNiCo<\/strong><\/td>\n<td style=\"text-align: left;\">Trung b\u00ecnh-Cao<\/td>\n<td style=\"text-align: left;\">V\u1eeba ph\u1ea3i<\/td>\n<td style=\"text-align: left;\">C\u1ee9ng v\u00e0 gi\u00f2n, d\u00f9 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00fac ho\u1eb7c sinter.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><strong>Neodymium nung k\u1ebft (NdFeB):<\/strong> M\u1ed1c c\u01a1 s\u1edf <strong>Thu\u1ed9c t\u00ednh c\u01a1 h\u1ecdc c\u1ee7a NdFeB<\/strong> \u01b0u ti\u00ean s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng th\u00f4 h\u01a1n \u0111\u1ed9 b\u1ec1n v\u1eadt l\u00fd. M\u1ed9t c\u00fa t\u00e1c \u0111\u1ed9ng g\u00e3y \u0111\u1ed9t ng\u1ed9t v\u00e0 kh\u00f4ng ki\u1ec3m so\u00e1t s\u1ebd g\u1ea7n nh\u01b0 ch\u1eafc ch\u1eafn g\u00e2y s\u1ee9t m\u1ebb ho\u1eb7c v\u1ee1 v\u1ee5n. Khi \u0111\u00e1nh gi\u00e1 <a href=\"https:\/\/nbaem.com\/vi\/ferrite-magnet-vs-neodymium\/\">ferrite so v\u1edbi l\u1ef1a ch\u1ecdn neodymium<\/a> cho l\u1eafp r\u00e1p c\u1ee7a b\u1ea1n, h\u00e3y nh\u1edb r\u1eb1ng neodymium \u0111\u00f2i h\u1ecfi quy tr\u00ecnh x\u1eed l\u00fd nghi\u00eam ng\u1eb7t h\u01a1n nhi\u1ec1u.<\/li>\n<li><strong>Samarium Cobalt (SmCo):<\/strong> Ch\u00fang t\u00f4i d\u1ef1a nhi\u1ec1u v\u00e0o SmCo cho c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 v\u00e0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao. Tuy nhi\u00ean, <strong>\u0110\u1ed9 to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac Samarium Cobalt<\/strong> n\u1ed5i ti\u1ebfng l\u00e0 k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng. \u0110\u00e2y l\u00e0 lo\u1ea1i v\u1eadt li\u1ec7u \u0111\u1ea5t hi\u1ebfm d\u1ec5 n\u1ee9t nh\u1ea5t v\u00e0 s\u1ebd b\u1ecb v\u1ee1 d\u1ec5 d\u00e0ng d\u01b0\u1edbi \u00e1p l\u1ef1c c\u01a1 h\u1ecdc t\u1ed1i thi\u1ec3u.<\/li>\n<li><strong>Ferro (G\u1ed1m):<\/strong> <strong>\u0110\u1ed9 m\u1ecfng manh c\u1ee7a nam ch\u00e2m ferrite<\/strong> l\u00e0 ch\u00ednh x\u00e1c nh\u1eefng g\u00ec b\u1ea1n mong \u0111\u1ee3i t\u1eeb m\u1ed9t lo\u1ea1i g\u1ed1m ti\u00eau chu\u1ea9n. N\u00f3 c\u00f3 chi ph\u00ed r\u1ea5t ph\u1ea3i ch\u0103ng v\u00e0 ch\u1ed1ng \u0103n m\u00f2n cao, nh\u01b0ng n\u00f3 s\u1ebd n\u1ee9t ho\u1eb7c v\u1ee1 gi\u1ed1ng nh\u01b0 m\u1ed9t vi\u00ean g\u1ea1ch g\u1ed1m n\u1ebfu ch\u1ecbu t\u00e1c \u0111\u1ed9ng b\u1edfi l\u1ef1c t\u00e1c \u0111\u1ed9ng m\u1ea1nh.<\/li>\n<li><strong>AlNiCo:<\/strong> M\u1eb7c d\u00f9 v\u1eabn c\u1ee9ng v\u00e0 gi\u00f2n, AlNiCo c\u00f3 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac h\u01a1i kh\u00e1c. V\u00ec n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00fac ho\u1eb7c sinter, n\u00f3 ch\u1ecbu \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch bi\u00ean so v\u1edbi m\u1ed9t s\u1ed1 lo\u1ea1i gia c\u00f4ng nh\u1ea5t \u0111\u1ecbnh t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c t\u00f9y ch\u1ecdn hi\u1ebfm \u0111\u1ea5t hi\u1ebfm, m\u1eb7c d\u00f9 n\u00f3 v\u1eabn kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c khoan th\u00f4ng th\u01b0\u1eddng.<\/li>\n<\/ul>\n<h3>C\u00e1c gi\u1ea3i ph\u00e1p thay th\u1ebf: Cao su, t\u1eeb t\u00ednh linh ho\u1ea1t v\u00e0 t\u1eeb t\u00ednh k\u1ebft d\u00ednh<\/h3>\n<p>N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn rung \u0111\u1ed9ng m\u1ea1nh ho\u1eb7c va \u0111\u1eadp c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng ti\u00eau chu\u1ea9n <strong>\u0111\u1ed9 b\u1ec1n c\u1ee7a nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong>, ch\u00fang t\u00f4i th\u01b0\u1eddng \u0111\u1ec1 xu\u1ea5t c\u00e1c l\u1ef1a ch\u1ecdn li\u00ean k\u1ebft ho\u1eb7c linh ho\u1ea1t h\u01a1n. B\u1eb1ng c\u00e1ch ti\u00eam ch\u1ea5t k\u1ebft d\u00ednh polymer\u2014nh\u01b0 cao su, nylon, ho\u1eb7c PPS\u2014v\u00e0o b\u1ed9t t\u1eeb t\u00ednh, ch\u00fang t\u00f4i l\u00e0m thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 b\u1ea3n ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<p>Quy tr\u00ecnh n\u00e0y cung c\u1ea5p \u0111\u1ed9 linh ho\u1ea1t c\u01a1 h\u1ecdc tuy\u1ec7t v\u1eddi v\u00e0 ho\u00e0n to\u00e0n lo\u1ea1i b\u1ecf c\u00e1c r\u1ee7i ro bong m\u1ebb. S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i th\u00ec r\u00f5 r\u00e0ng: b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 an to\u00e0n c\u1ea5u tr\u00fac v\u00e0 d\u1ec5 l\u1eafp r\u00e1p, nh\u01b0ng \u0111\u1ed5i l\u1ea1i l\u00e0 hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh \u0111\u1ec9nh cao b\u1ecb gi\u1ea3m.<\/p>\n<h2>R\u1ee7i ro v\u1eadn h\u00e0nh v\u00e0 Th\u00e1ch th\u1ee9c s\u1ea3n xu\u1ea5t<\/h2>\n<p>X\u1eed l\u00fd t\u00ednh gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb v\u0129nh vi\u1ec5n \u0111\u1eb7t ra nh\u1eefng tr\u1edf ng\u1ea1i nghi\u00eam tr\u1ecdng tr\u00ean s\u00e0n nh\u00e0 m\u00e1y. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng g\u00ec ch\u00fang ta \u0111\u1ed1i m\u1eb7t trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 tri\u1ec3n khai:<\/p>\n<h3>X\u1eed l\u00fd v\u00e0 L\u1eafp r\u00e1p R\u1ee7i ro<\/h3>\n<ul>\n<li><strong>S\u1ef1 h\u1ea5p d\u1eabn kh\u00f4ng th\u1ec3 ki\u1ec1m ch\u1ebf<\/strong> Khi nam ch\u00e2m m\u1ea1nh gh\u00e9p l\u1ea1i v\u1edbi nhau, va ch\u1ea1m c\u00f3 t\u00e1c \u0111\u1ed9ng cao g\u00e2y v\u1ee1 v\u1ee5n ngay l\u1eadp t\u1ee9c.<\/li>\n<li><strong>R\u1ee7i ro An to\u00e0n:<\/strong> Lo\u1ea1i \u0111\u1ee9t g\u00e3y nam ch\u00e2m c\u00f4ng nghi\u1ec7p n\u00e0y t\u1ea1o ra nh\u1eefng m\u1ea3nh v\u1ee5n bay tung v\u00e0 nguy c\u01a1 ph\u00f3ng tia l\u1eeda. \u00c1p d\u1ee5ng \u0111\u00fang c\u00e1c quy t\u1eafc x\u1eed l\u00fd nam ch\u00e2m neodymium nghi\u00eam ng\u1eb7t l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ec3 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi v\u1eadn h\u00e0nh v\u00e0 ng\u0103n ng\u1eeba ph\u1ebf li\u1ec7u.<\/li>\n<\/ul>\n<h3>Gi\u1edbi h\u1ea1n gia c\u00f4ng<\/h3>\n<ul>\n<li><strong>Kh\u00f4ng c\u00f3 c\u00f4ng c\u1ee5 chu\u1ea9n:<\/strong> B\u1ea1n kh\u00f4ng th\u1ec3 khoan, xoay ho\u1eb7c phay magnet sintered nh\u01b0 kim lo\u1ea1i th\u00f4ng th\u01b0\u1eddng. \u0110\u1ed9 gi\u00f2n v\u1ed1n c\u00f3 c\u00f3 ngh\u0129a l\u00e0 c\u00e1c d\u1ee5ng c\u1ee5 c\u1eaft th\u00f4ng th\u01b0\u1eddng s\u1ebd l\u00e0m n\u1ee9t magnet ngay l\u1eadp t\u1ee9c.<\/li>\n<li><strong>M\u00e0i kim c\u01b0\u01a1ng:<\/strong> Gia c\u00f4ng c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y \u0111\u00f2i h\u1ecfi qu\u00e1 tr\u00ecnh m\u00e0i c\u00f4ng c\u1ee5 kim c\u01b0\u01a1ng c\u00f3 l\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc chuy\u00ean bi\u1ec7t \u0111\u1ec3 ng\u0103n ng\u1eeba h\u01b0 h\u1ea1i c\u1ea5u tr\u00fac v\u00e0 ki\u1ec3m so\u00e1t s\u1ef1 t\u00edch t\u1ee5 nhi\u1ec7t.<\/li>\n<\/ul>\n<h3>Chi ph\u00ed c\u1ee7a s\u1ef1 c\u1ed1 s\u1eed d\u1ee5ng cu\u1ed1i c\u00f9ng<\/h3>\n<ul>\n<li><strong>H\u1ecfng h\u1ec7 th\u1ed1ng:<\/strong> Trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u0111\u1ed9 r\u1ee7i ro cao nh\u01b0 xe \u0111i\u1ec7n (EV) v\u00e0 robot, nam ch\u00e2m b\u1ecb s\u1ee9t m\u1ebb l\u00e0 m\u1ed9t th\u1ea3m h\u1ecda t\u1ed1n k\u00e9m.<\/li>\n<li><strong>\u00d4 nhi\u1ec5m:<\/strong> M\u1ea3nh t\u1eeb t\u00ednh b\u1ecb g\u00e3y c\u00f3 th\u1ec3 k\u1eb9t rotor, l\u00e0m h\u1ecfng \u0111i\u1ec7n t\u1eed b\u00ean trong ho\u1eb7c l\u00e0m \u00f4 nhi\u1ec5m d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t. Hi\u1ec3u \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n v\u1eadt l\u00fd c\u1ee7a c\u00e1c lo\u1ea1i kh\u00e1c nhau <a href=\"https:\/\/nbaem.com\/vi\/magnets-materials\/\" target=\"_blank\" rel=\"noopener\">v\u1eadt li\u1ec7u nam ch\u00e2m<\/a> ti\u1ec1n m\u1eb7t l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 ng\u0103n ng\u1eeba c\u00e1c s\u1ef1 c\u1ed1 \u0111\u1eaft \u0111\u1ecf \u1edf giai \u0111o\u1ea1n sau.<\/li>\n<\/ul>\n<h2>Gi\u1ea3i ph\u00e1p c\u1ee7a NBAEM \u0111\u1ec3 gi\u1ea3m gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb t\u00ednh v\u0129nh c\u1eedu<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/03\/Permanent_Magnet_Brittleness_Solutions_l5IsVBPio.webp\" alt=\"C\u00e1c gi\u1ea3i ph\u00e1p Gi\u00f2n c\u1ee7a Nam ch\u00e2m V\u0129nh vi\u1ec5n\" \/><\/p>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm th\u00f4 v\u1ed1n d\u0129 d\u1ec5 v\u1ee1. \u0110\u1ec3 ch\u1ed1ng l\u1ea1i s\u1ef1 d\u1ec5 v\u1ee1 c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n, ch\u00fang t\u00f4i thi\u1ebft k\u1ebf c\u00e1c gi\u1ea3i ph\u00e1p c\u1ea5u tr\u00fac th\u1ef1c d\u1ee5ng gi\u00fap cho d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ea1n v\u1eadn h\u00e0nh li\u00ean t\u1ee5c m\u00e0 kh\u00f4ng ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi chi ph\u00ed \u0111\u1ed5 v\u1ee1 \u0111\u1eaft \u0111\u1ecf.<\/p>\n<h3>Thi\u1ebft k\u1ebf Nam ch\u00e2m Chi\u1ebfn l\u01b0\u1ee3c<\/h3>\n<p>Ch\u00fang t\u00f4i \u0111\u1ed1i m\u1eb7t v\u1edbi s\u1ef1 gi\u00f2n d\u1ec5 v\u1ee1 ngay t\u1eeb giai \u0111o\u1ea1n b\u1ea3n thi\u1ebft k\u1ebf. Th\u00f4ng qua c\u1ea9n tr\u1ecdng <strong>t\u1ed1i \u01b0u th\u00e0nh ph\u1ea7n t\u1eeb t\u00ednh<\/strong>, \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i lo\u1ea1i b\u1ecf c\u00e1c g\u00f3c c\u1ea1nh vu\u00f4ng 90 \u0111\u1ed9 g\u00e2y h\u01b0 h\u1ea1i n\u1ed5i ti\u1ebfng. Thay v\u00e0o \u0111\u00f3, ch\u00fang t\u00f4i d\u1ef1a nhi\u1ec1u v\u00e0o <strong>m\u00e0i c\u1ea1nh nam ch\u00e2m b\u1eb1ng ma t\u00edt<\/strong> v\u00e0 c\u00e1c c\u1ea1nh t\u1ea1o b\u00e1n k\u00ednh. Thay \u0111\u1ed5i h\u00ecnh h\u1ecdc \u0111\u01a1n gi\u1ea3n nh\u01b0ng then ch\u1ed1t n\u00e0y l\u00e0m gi\u1ea3m l\u01b0\u1ee3ng c\u0103ng th\u1eb3ng t\u1eadp trung \u0111\u00e1ng k\u1ec3, l\u00e0m cho nam ch\u00e2m kh\u00f3 b\u1ecb bong tr\u00f3c d\u01b0\u1edbi \u00e1p l\u1ef1c.<\/p>\n<h3>L\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 v\u00e0 M\u1ea1<\/h3>\n<p>Vi\u1ec7c b\u1ed5 sung m\u1ed9t l\u1edbp ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t ch\u1ea5t l\u01b0\u1ee3ng cao kh\u00f4ng ch\u1ec9 ng\u0103n r\u1ec9 s\u00e9t. \u00c1p d\u1ee5ng \u0111\u00fang <a href=\"https:\/\/nbaem.com\/vi\/magnet-coating\/\">l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 nam ch\u00e2m<\/a>\u2014 nh\u01b0 Ni-Cu-Ni, Epoxy, ho\u1eb7c m\u1ea1 Zinc \u2014 th\u00eam m\u1ed9t l\u1edbp c\u1ea5u tr\u00fac vi m\u00f4 m\u00e0 thi\u1ebft y\u1ebfu. V\u1ecf ngo\u00e0i ch\u1eb7t ch\u1ebd n\u00e0y gi\u1eef cho c\u1ea5u tr\u00fac grain gi\u00f2n l\u1ea1i v\u1edbi nhau, l\u00e0 h\u00e0ng ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean cho s\u1ef1 <strong>ng\u0103n v\u1ee1 h\u1ea1t trong nam ch\u00e2m sinter<\/strong>.<\/p>\n<h3>L\u1ee3i th\u1ebf L\u1eafp gh\u00e9p t\u1eeb Nam Ch\u00e2m<\/h3>\n<p>C\u00e1ch an to\u00e0n tuy\u1ec7t \u0111\u1ed1i \u0111\u1ec3 qu\u1ea3n l\u00fd m\u1ed9t v\u1eadt li\u1ec7u c\u1ef1c k\u1ef3 gi\u00f2n l\u00e0 b\u1ea3o v\u1ec7 n\u00f3 tr\u01b0\u1edbc khi n\u00f3 \u0111\u1ebfn d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p c\u1ee7a b\u1ea1n.<\/p>\n<ul>\n<li><strong>V\u1ecf b\u1ea3o v\u1ec7 nam ch\u00e2m:<\/strong> Ch\u00fang t\u00f4i \u0111\u1ef1ng securely nam ch\u00e2m mong manh b\u00ean trong v\u1ecf b\u1eb1ng th\u00e9p, \u0111\u1ed3ng thau ho\u1eb7c nh\u1ef1a b\u1ec1n.<\/li>\n<li><strong>Chuy\u1ec3n giao r\u1ee7i ro:<\/strong> B\u1eb1ng c\u00e1ch thu\u00ea ngo\u00e0i to\u00e0n b\u1ed9 c\u00e1c b\u1ed9 l\u1eafp gh\u00e9p cho NBAEM, b\u1ea1n chuy\u1ec3n c\u00e1c r\u1ee7i ro x\u1eed l\u00fd tr\u1ef1c ti\u1ebfp cho ch\u00fang t\u00f4i.<\/li>\n<li><strong>Gi\u1ea3m chi ph\u00ed:<\/strong> Nh\u1eadn c\u00e1c th\u00e0nh ph\u1ea7n s\u1eb5n s\u00e0ng l\u1eafp \u0111\u1eb7t ngay l\u1eadp t\u1ee9c l\u00e0m gi\u1ea3m t\u1ec9 l\u1ec7 ph\u1ebf ph\u1ea9m n\u1ed9i b\u1ed9 v\u00e0 lo\u1ea1i b\u1ecf c\u00e1c ch\u1eadm tr\u1ec5 b\u1ea5t ng\u1edd tr\u00ean d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p.<\/li>\n<\/ul>\n<h3>Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng &amp; PPAP m\u1ee9c \u0111\u1ed9 3<\/h3>\n<p>\u0110\u1ed9 tin c\u1eady c\u01a1 h\u1ecdc kh\u00f4ng bao gi\u1edd \u0111\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o may r\u1ee7i. L\u00e0 m\u1ed9t \u2026 <strong>nh\u00e0 cung c\u1ea5p magnet PPAP c\u1ea5p 3<\/strong>, ch\u00fang t\u00f4i h\u1ed7 tr\u1ee3 to\u00e0n b\u1ed9 quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u1edbi c\u00e1c b\u00e0i ki\u1ec3m tra nghi\u00eam ng\u1eb7t d\u1ef1a tr\u00ean d\u1eef li\u1ec7u. C\u00e1c c\u01a1 s\u1edf c\u1ee7a ch\u00fang t\u00f4i tu\u00e2n th\u1ee7 \u0111\u1ea7y \u0111\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ISO 9001, ISO 14001 v\u00e0 ISO\/TS16949, \u0111\u1ea3m b\u1ea3o m\u1ed7i l\u00f4 h\u00e0ng c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c th\u1ef1c t\u1ebf c\u01a1 h\u1ecdc c\u1ee7a \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n<h2>Qu\u1ea3n l\u00fd \u0111\u1ed9 gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb v\u0129nh vi\u1ec5n trong c\u00e1c c\u01a1 s\u1edf<\/h2>\n<p>\u0110ang x\u1eed l\u00fd v\u1edbi <strong>t\u00ednh gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> y\u00eau c\u1ea7u c\u00e1c nguy\u00ean t\u1eafc v\u1eadn h\u00e0nh nghi\u00eam ng\u1eb7t tr\u00ean m\u1eb7t b\u1eb1ng s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ea1n. V\u00ec nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm sintered thi\u1ebfu \u0111\u1ed9 b\u1ec1n n\u1ee9t v\u00e0 d\u1ec5 v\u1ee1 khi va \u0111\u1eadp, ch\u00fang t\u00f4i th\u1ef1c hi\u1ec7n c\u00e1c nguy\u00ean t\u1eafc x\u1eed l\u00fd an to\u00e0n \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 l\u1ef1c l\u01b0\u1ee3ng lao \u0111\u1ed9ng.<\/p>\n<h3>B\u1ed9 l\u00e0m vi\u1ec7c phi t\u1eeb t\u00ednh<\/h3>\n<p>Thi\u1ebft l\u1eadp m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd ph\u00f9 h\u1ee3p l\u00e0 tuy\u1ebfn ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean c\u1ee7a b\u1ea1n ch\u1ed1ng l\u1ea1i <strong>s\u1ef1 c\u1ed1 v\u1ee1 nam ch\u00e2m c\u00f4ng nghi\u1ec7p<\/strong>.<\/p>\n<ul>\n<li><strong>B\u1ecf th\u00e9p:<\/strong> Ch\u00fa \u00fd: Kh\u00f4ng m\u1edf h\u1ed9p hay l\u1eafp r\u00e1p nam ch\u00e2m m\u1ea1nh tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c b\u1eb1ng th\u00e9p cacbon chu\u1ea9n.<\/li>\n<li><strong>S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u an to\u00e0n:<\/strong> Chuy\u1ec3n sang c\u00e1c b\u00e0n l\u00e0m vi\u1ec7c \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o ho\u00e0n to\u00e0n t\u1eeb g\u1ed7, nh\u00f4m, th\u00e9p kh\u00f4ng g\u1ec9 300-series, ho\u1eb7c nh\u1ef1a ch\u1ecbu t\u1ea3i cao.<\/li>\n<li><strong>X\u00f3a khu v\u1ef1c:<\/strong> Lo\u1ea1i b\u1ecf t\u1ea5t c\u1ea3 c\u00e1c d\u1ee5ng c\u1ee5 s\u1eaft t\u1eeb l\u1ecfng (\u0111i\u1ec7n) kh\u1ecfi khu v\u1ef1c l\u1eafp r\u00e1p ngay l\u1eadp t\u1ee9c \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 h\u1ea5p d\u1eabn t\u1eeb t\u00ednh b\u1ea5t ng\u1edd v\u00e0 m\u1ea1nh m\u1ebd.<\/li>\n<\/ul>\n<h3>H\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd nam ch\u00e2m neodymium<\/h3>\n<p>Khi c\u00e1c nam ch\u00e2m m\u1ea1nh \u0111\u1ebfn qu\u00e1 g\u1ea7n nhau, ch\u00fang s\u1ebd t\u0103ng t\u1ed1c v\u1ec1 ph\u00eda nhau v\u00e0 va ch\u1ea1m v\u1edbi l\u1ef1c \u0111\u1ee7 \u0111\u1ec3 l\u00e0m v\u1ee1 v\u1ee5n. Ch\u00fang t\u00f4i d\u1ef1a v\u00e0o kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o <strong>\u0111\u1ed9 b\u1ec1n c\u1ee7a nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong> trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<ul>\n<li><strong>C\u00f4ng c\u1ee5 c\u1ed1 \u0111\u1ecbnh &amp; Jig t\u00f9y ch\u1ec9nh:<\/strong> Lu\u00f4n s\u1eed d\u1ee5ng c\u00e1c jig ri\u00eang bi\u1ec7t kh\u00f4ng t\u1eeb t\u00ednh \u0111\u1ec3 gi\u1eef nam ch\u00e2m c\u1ed1 \u0111\u1ecbnh v\u00e0 h\u01b0\u1edbng d\u1eabn ch\u00fang trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/li>\n<li><strong>Kho\u1ea3ng c\u00e1ch kh\u00f4ng t\u1eeb t\u00ednh:<\/strong> Gi\u1eef nam ch\u00e2m c\u00e1ch nhau tr\u00ean d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p b\u1eb1ng c\u00e1c mi\u1ebfng \u0111\u1ec7m b\u1eb1ng nh\u1ef1a d\u00e0y, g\u1ed7 ho\u1eb7c b\u00eca c\u1ee9ng. Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng x\u1ebfp ch\u1ed3ng nam ch\u00e2m kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 tr\u1ef1c ti\u1ebfp l\u00ean tr\u00ean.<\/li>\n<li><strong>Ph\u00e1t h\u00e0nh c\u00f3 ki\u1ec3m so\u00e1t:<\/strong> Kh\u00f4ng cho ph\u00e9p m\u1ed9t nam ch\u00e2m \u201cnh\u1ea3y\u201d v\u00e0o v\u1ecf th\u00e9p c\u1ee7a n\u00f3. H\u01b0\u1edbng d\u1eabn n\u00f3 m\u1ed9t c\u00e1ch c\u01a1 h\u1ecdc \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o qu\u00e1 tr\u00ecnh ng\u1ed3i kh\u00e1 m\u1ec1m v\u00e0 c\u00f3 ki\u1ec3m so\u00e1t.<\/li>\n<\/ul>\n<h3>\u0110\u00e0o t\u1ea1o nh\u00e2n vi\u00ean &amp; Quy tr\u00ecnh an to\u00e0n<\/h3>\n<p>Ngay c\u1ea3 nh\u1eefng chi\u1ebfn l\u01b0\u1ee3c t\u1ed1t nh\u1ea5t c\u0169ng s\u1ebd th\u1ea5t b\u1ea1i n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o ng\u01b0\u1eddi lao \u0111\u1ed9ng \u0111\u00fang c\u00e1ch. Nh\u00e2n vi\u00ean tr\u00ean d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p c\u1ee7a b\u1ea1n ph\u1ea3i hi\u1ec3u r\u1eb1ng h\u1ecd \u0111ang x\u1eed l\u00fd v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 gi\u00f2n nh\u01b0 chi\u1ebfc t\u00e1ch tr\u00e0 g\u1ed1m, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t kh\u1ed1i th\u00e9p r\u1eafn. <strong>ng\u0103n v\u1ee1 h\u1ea1t trong nam ch\u00e2m sinter<\/strong> Nh\u1eadn th\u1ee9c v\u1ec1 t\u00e1c \u0111\u1ed9ng:<\/p>\n<ul>\n<li><strong>D\u1ea1y c\u00f4ng nh\u00e2n c\u00e1ch t\u00e1ch r\u1eddi nam ch\u00e2m m\u1ea1nh m\u1ed9t c\u00e1ch an to\u00e0n b\u1eb1ng c\u00e1ch tr\u01b0\u1ee3t ch\u00fang ra xa nhau thay v\u00ec k\u00e9o, ng\u0103n ch\u00fang t\u00e1ch ra v\u1edbi l\u1ef1c m\u1ea1nh v\u00e0 b\u1eadt tr\u1edf l\u1ea1i.<\/strong> Even the best<\/li>\n<li><strong>Trang b\u1ecb PPE b\u1eaft bu\u1ed9c:<\/strong> Lu\u00f4n y\u00eau c\u1ea7u k\u00ednh b\u1ea3o h\u1ed9 \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c m\u1ea3nh kim lo\u1ea1i bay do va ch\u1ea1m \u1edf t\u1ed1c \u0111\u1ed9 cao b\u1ea5t ng\u1edd. G\u0103ng tay n\u1eb7ng c\u0169ng r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u0103n ng\u1eeba th\u01b0\u01a1ng t\u00edch k\u1eb9p nghi\u00eam tr\u1ecdng.<\/li>\n<li><strong>Quy tr\u00ecnh l\u00e0m vi\u1ec7c \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a:<\/strong> Tri\u1ec3n khai h\u01b0\u1edbng d\u1eabn l\u1eafp r\u00e1p nghi\u00eam ng\u1eb7t, t\u1eebng b\u01b0\u1edbc m\u1ed9t. N\u1ebfu b\u1ea1n c\u1ea7n h\u1ed7 tr\u1ee3 ph\u00e1t tri\u1ec3n quy tr\u00ecnh x\u1eed l\u00fd an to\u00e0n ho\u1eb7c c\u00e1c gi\u00e1 \u0111\u1ee1 t\u00f9y ch\u1ec9nh cho d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ea1n, <a href=\"https:\/\/nbaem.com\/vi\/contact-us\/\">h\u00e3y li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i<\/a> \u0111\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 m\u1ed9t gi\u1ea3i ph\u00e1p l\u1eafp gh\u00e9p t\u1eeb t\u00ednh to\u00e0n di\u1ec7n.<\/li>\n<\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: \u0110\u1ed9 gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb v\u0129nh vi\u1ec5n<\/h2>\n<h3>T\u1ea1i sao nam ch\u00e2m neodymium l\u1ea1i gi\u00f2n so v\u1edbi th\u00e9p th\u00f4ng th\u01b0\u1eddng?<\/h3>\n<p>Th\u00e9p c\u00f3 th\u1ec3 u\u1ed1n cong v\u00ec m\u1ea1ng tinh th\u1ec3 c\u1ee7a n\u00f3 cho ph\u00e9p bi\u1ebfn d\u1ea1ng plastic. Nam ch\u00e2m neodymium kh\u00f4ng th\u1ec3. Ch\u00fang \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00f4ng ngh\u1ec7 kim lo\u1ea1i b\u1ed9t \u2014 m\u1ed9t qu\u00e1 tr\u00ecnh \u00e9p v\u00e0 nung b\u1ee5i kim lo\u1ea1i m\u1ecbn. Khi b\u1ea1n hi\u1ec3u \u0111\u00fang <a href=\"https:\/\/nbaem.com\/vi\/what-are-magnets-made-of\/\">ch\u1ea5t li\u1ec7u c\u1ee7a nam ch\u00e2m<\/a>, s\u1ebd th\u1ea5y c\u1ea5u tr\u00fac tinh th\u1ec3 li\u00ean kim lo\u1ea1i c\u1ee9ng nh\u1eafc c\u1ee7a ch\u00fang thi\u1ebfu b\u1ea5t k\u1ef3 s\u1ef1 linh ho\u1ea1t n\u00e0o. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 <strong>Thu\u1ed9c t\u00ednh c\u01a1 h\u1ecdc c\u1ee7a NdFeB<\/strong> ch\u00fang v\u1ec1 c\u01a1 b\u1ea3n gi\u1ed1ng g\u1ed1m m\u1ecfng manh h\u01a1n kim lo\u1ea1i dai; ch\u00fang s\u1ebd g\u00e3y ho\u1eb7c v\u1ee1 khi va \u0111\u1eadp thay v\u00ec bi\u1ebfn d\u1ea1ng.<\/p>\n<h3>B\u1ea1n c\u00f3 th\u1ec3 gia c\u00f4ng ho\u1eb7c khoan m\u1ed9t nam ch\u00e2m sintered m\u1ed9t c\u00e1ch an to\u00e0n m\u00e0 kh\u00f4ng l\u00e0m n\u00f3 g\u00e3y kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng v\u1edbi d\u1ee5ng c\u1ee5 th\u00f4ng th\u01b0\u1eddng trong x\u01b0\u1edfng. C\u1ed1 g\u1eafng drill ho\u1eb7c ti\u1ec7n m\u1ed9t nam ch\u00e2m sintered b\u1eb1ng m\u0169i khoan th\u00e9p nhanh ho\u1eb7c carbide th\u00f4ng d\u1ee5ng ngay l\u1eadp t\u1ee9c s\u1ebd l\u00e0m n\u00f3 g\u00e3y. Do c\u0103ng th\u1eb3ng n\u1ed9i t\u1ea1i v\u00e0 \u0111\u1ed9 ch\u1ecbu n\u1ee9t th\u1ea5p, <strong>\u0111\u1ed9 b\u1ec1n c\u1ee7a nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong> v\u1eadt li\u1ec7u s\u1ebd r\u1ea5t k\u00e9m ch\u1ecbu l\u1ef1c c\u01a1 h\u1ecdc tr\u1ef1c ti\u1ebfp. \u0110\u1ec3 \u0111\u1ecbnh d\u1ea1ng nam ch\u00e2m, ch\u00fang ta ph\u1ea3i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb m\u00e0i m\u00f2n kim c\u01b0\u01a1ng \u0111\u1eb7c bi\u1ec7t k\u1ebft h\u1ee3p v\u1edbi ch\u1ea5t l\u00e0m m\u00e1t b\u1eb1ng ch\u1ea5t l\u1ecfng n\u1eb7ng \u0111\u1ec3 ng\u0103n ng\u1eeba micro-cracking nghi\u00eam tr\u1ecdng do s\u1ed1c nhi\u1ec7t.<\/p>\n<h3>C\u00e1c l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 ng\u0103n ch\u1eb7n m\u1ebb ch\u1ed1t t\u1eeb trong s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p>L\u1edbp m\u1ea1 b\u1ec1 m\u1eb7t \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu cho <strong>ng\u0103n v\u1ee1 h\u1ea1t trong nam ch\u00e2m sinter<\/strong>. C\u00e1c l\u1edbp ph\u1ee7 nhi\u1ec1u l\u1edbp nh\u01b0 Nickel-Copper-Nickel (Ni-Cu-Ni), k\u1ebdm, ho\u1eb7c epoxy c\u00f4ng nghi\u1ec7p l\u00e0m \u0111\u01b0\u1ee3c nhi\u1ec1u h\u01a1n vi\u1ec7c ng\u0103n r\u1ec9 s\u00e9t. Ch\u00fang g\u1eafn ch\u1eb7t b\u1ec1 m\u1eb7t ngo\u00e0i h\u01a1i x\u1ed1p, \u0111\u01b0\u1ee3c nunsch sinter c\u1ee7a nam ch\u00e2m. M\u1eb7c d\u00f9 l\u1edbp ph\u1ee7 vi m\u00f4 kh\u00f4ng th\u1ec3 c\u1ee9u m\u1ed9t nam ch\u00e2m kh\u1ecfi va ch\u1ea1m v\u1edbi v\u1eadn t\u1ed1c cao, n\u00f3 t\u0103ng c\u01b0\u1eddng t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac cho c\u00e1c g\u00f3c s\u1eafc n\u00e9t. L\u1edbp ch\u1eafn n\u00e0y l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 nguy c\u01a1 s\u1ee9t m\u00e9p v\u00e0 \u00f4 nhi\u1ec5m b\u1ee5i khi thao t\u00e1c <a href=\"https:\/\/nbaem.com\/vi\/products\/neodymium-magnet\/\">nam ch\u00e2m neodymium<\/a> tr\u00ean d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p nh\u1ed9n nh\u1ecbp.<\/p>\n<div id=\"references\" class=\"min-w-0 scroll-mt-8 overflow-hidden\">\n<div class=\"text-[16px]\"><\/div>\n<div class=\"flex flex-col gap-2 text-sm leading-relaxed\">\n<div class=\"break-words text-[1em] leading-7\"><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 \u0111\u1ed9 gi\u00f2n c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb v\u0129nh vi\u1ec5n, nguy c\u01a1 v\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt NBAEM cho l\u1eafp gh\u00e9p nam ch\u00e2m t\u00f9y ch\u1ec9nh b\u1ec1n<\/p>","protected":false},"author":1,"featured_media":3753,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3754","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/03\/Permanent_Magnetic_Material_Brittleness_A1hiqJoyP.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3754","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=3754"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3754\/revisions"}],"predecessor-version":[{"id":3758,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3754\/revisions\/3758"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/3753"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}