{"id":1857,"date":"2019-05-22T02:48:24","date_gmt":"2019-05-22T02:48:24","guid":{"rendered":"http:\/\/www.meetyoucarbide.com\/single-post-heat-treatment-of-tungsten-carbide-products\/"},"modified":"2020-05-04T13:12:03","modified_gmt":"2020-05-04T13:12:03","slug":"heat-treatment-of-tungsten-carbide-products","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/nhiet-luyen-san-pham-vonfram-cacbua\/","title":{"rendered":"X\u1eed l\u00fd nhi\u1ec7t c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m cacbua vonfram"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">\n<div>\n<div>Cacbua xi m\u0103ng (hardmetal) l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef chung cho c\u00e1c h\u1ee3p kim bao g\u1ed3m c\u00e1c cacbua, nitrua, bo, ho\u1eb7c silicat c\u1ee7a c\u00e1c kim lo\u1ea1i c\u00f3 \u0111i\u1ec3m n\u00f3ng ch\u1ea3y cao (W, Mo, Ti, V, Ta, v.v.). \u0110\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ch\u00ednh c\u1ee7a \u0111\u00fac v\u00e0 thi\u00eau k\u1ebft. H\u1ee3p kim \u0111\u00fac c\u00f3 \u0111\u1ed9 gi\u00f2n cao v\u00e0 \u0111\u1ed9 d\u1ebbo dai th\u1ea5p, v\u00e0 c\u00f3 \u00edt gi\u00e1 tr\u1ecb \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i l\u00e0 c\u00e1c h\u1ee3p kim thi\u00eau k\u1ebft, th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u00eau k\u1ebft t\u1eeb cacbua vonfram ho\u1eb7c titan cacbua v\u00e0 b\u1ed9t coban v\u00e0 c\u00f3 \u0111\u1ed9 c\u1ee9ng cao, ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 c\u1ee9ng n\u00f3ng. Ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u1eaft v\u00e0 x\u1eed l\u00fd v\u1eadt li\u1ec7u c\u1ee9ng t\u1ed1c \u0111\u1ed9 cao, trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, vi\u1ec7c s\u1eed d\u1ee5ng cacbua trong ng\u00e0nh c\u00f4ng nghi\u1ec7p khu\u00f4n c\u0169ng ng\u00e0y c\u00e0ng t\u0103ng, v\u00ec v\u1eady n\u00f3 c\u00f3 \u00fd ngh\u0129a thi\u1ebft th\u1ef1c \u0111\u1ec3 th\u1ea3o lu\u1eadn v\u00e0 nghi\u00ean c\u1ee9u x\u1eed l\u00fd nhi\u1ec7t h\u1ee3p kim c\u1ee9ng.<\/div>\n<h2>1. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a cacbua xi m\u0103ng<\/h2>\n<div>Cacbua \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p luy\u1ec7n kim b\u1ed9t t\u1eeb h\u1ee3p ch\u1ea5t c\u1ee9ng kim lo\u1ea1i ch\u1ecbu l\u1eeda v\u00e0 pha li\u00ean k\u1ebft kim lo\u1ea1i. C\u00e1c h\u1ee3p ch\u1ea5t c\u1ee9ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 cacbua. L\u00e0 h\u1ee3p kim c\u1ee9ng cho d\u1ee5ng c\u1ee5 c\u1eaft, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng WC, TiC, TaC, NbC, v.v., ch\u1ea5t k\u1ebft d\u00ednh l\u00e0 Co v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a cacbua xi m\u0103ng ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o h\u00e0m l\u01b0\u1ee3ng c\u1ee7a C\u00f4ng ty v\u00ec cacbua trong cacbua xi m\u0103ng c\u00f3 \u0111i\u1ec3m n\u00f3ng ch\u1ea3y cao (nh\u01b0 nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y 3140 \u00b0 C. c\u1ee7a Ti C), \u0111\u1ed9 c\u1ee9ng cao (nh\u01b0 \u0111\u1ed9 c\u1ee9ng 3200 HV c\u1ee7a TiC), \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh h\u00f3a h\u1ecdc t\u1ed1t v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t, \u0111\u1ed9 c\u1ee9ng v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n ch\u00fang cao \u0110\u1ed9 \u1ed5n \u0111\u1ecbnh gi\u1edbi t\u00ednh v\u00e0 h\u00f3a h\u1ecdc cao h\u01a1n nhi\u1ec1u so v\u1edbi th\u00e9p c\u00f4ng c\u1ee5 t\u1ed1c \u0111\u1ed9 cao.<\/div>\n<div>Pha c\u1ee9ng cacbua th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu l\u00e0 WC, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n t\u1ed1t. M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 cacbua c\u00f3 \u0111\u1ed9 c\u1ee9ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 WC, nh\u01b0ng ch\u00fang kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00f2n t\u01b0\u01a1ng t\u1ef1. WC c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 n\u0103ng su\u1ea5t cao h\u01a1n (6000 MPa), do \u0111\u00f3 n\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u1ebbo cao h\u01a1n. \u0110\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a WC c\u0169ng t\u1ed1t v\u00e0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t l\u00e0 m\u1ed9t ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t quan tr\u1ecdng c\u1ee7a d\u1ee5ng c\u1ee5. WC c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t th\u1ea5p h\u01a1n, kho\u1ea3ng 1\/3 so v\u1edbi th\u00e9p; m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u1ee7a n\u00f3 g\u1ea5p 3 l\u1ea7n th\u00e9p v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a n\u00f3 c\u0169ng cao h\u01a1n th\u00e9p. Ngo\u00e0i ra, WC c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 oxy h\u00f3a t\u1ed1t \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, kh\u00e1ng \u0111i\u1ec7n t\u1ed1t v\u00e0 \u0111\u1ed9 b\u1ec1n u\u1ed1n cao.<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/141d2f_81c0203af9944a51a545f303606bbd5dmv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>H\u00ecnh 1 S\u01a1 \u0111\u1ed3 c\u00e2n b\u1eb1ng c\u1ee7a h\u1ee3p kim WC-Co<\/div>\n<h2>2. T\u1ed5 ch\u1ee9c x\u1eed l\u00fd nhi\u1ec7t v\u00e0 h\u1ee3p kim<\/h2>\n<div>N\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u1ec1 c\u00e1c giai \u0111o\u1ea1n li\u00ean k\u1ebft c\u1ee7a h\u1ee3p kim WC-Co v\u1edbi c\u00e1c t\u1ef7 l\u1ec7 C \/ W kh\u00e1c nhau t\u1eeb 5% \u0111\u1ebfn 35% WC. C\u00e1c k\u1ebft lu\u1eadn \u0111\u01b0\u1ee3c r\u00fat ra nh\u01b0 sau: c\u00e1c pha pha ho\u1eb7c (\u03b3 + WC) \u0111\u01b0\u1ee3c t\u1ea1o ra trong h\u1ee3p kim khi l\u00e0m ngu\u1ed9i ch\u1eadm; Khi c\u00f3 (+) xu\u1ea5t hi\u1ec7n. Tuy nhi\u00ean, v\u00ec pha (\u03b3 +) kh\u00f4ng \u1ed5n \u0111\u1ecbnh, pha (\u03b3 +) s\u1ebd chuy\u1ec3n th\u00e0nh pha \u1ed5n \u0111\u1ecbnh (\u03b3 + WC) sau khi \u1ee7. Theo k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m, s\u01a1 \u0111\u1ed3 pha c\u00e2n b\u1eb1ng b\u00e1n k\u00ednh nh\u01b0 trong h\u00ecnh 1 \u0111\u01b0\u1ee3c v\u1ebd (\u0111\u01b0\u1eddng li\u1ec1n n\u00e9t l\u00e0 s\u01a1 \u0111\u1ed3 pha c\u1ee7a h\u1ec7 \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u01b0\u1eddng \u0111\u1ee9t n\u00e9t l\u00e0 s\u01a1 \u0111\u1ed3 pha c\u1ee5c b\u1ed9 minh h\u1ecda c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a \u1ed5n \u0111\u1ecbnh b\u00e1n c\u1ea7u giai \u0111o\u1ea1n).<\/div>\n<div>Vi\u1ec7c \u1ee7 (l\u00e0m l\u1ea1nh ch\u1eadm) c\u1ee7a cacbua xi m\u0103ng \u0111i\u1ec3n h\u00ecnh ph\u1ee5 thu\u1ed9c ch\u1ee7 y\u1ebfu v\u00e0o h\u00e0m l\u01b0\u1ee3ng carbon: khi C \/ W&gt; 1, carbon t\u1ef1 do k\u1ebft t\u1ee7a tr\u00ean ranh gi\u1edbi pha WC-Co; khi C \/ W &lt;1, c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a h\u1ee3p kim c\u00f3 Trong c\u1ea3 hai tr\u01b0\u1eddng h\u1ee3p: M\u1ed9t n\u1eb1m trong v\u00f9ng ba pha (WC + +). Kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi pha appears xu\u1ea5t hi\u1ec7n sau khi h\u1ee3p kim \u0111\u01b0\u1ee3c l\u00e0m l\u1ea1nh ch\u1eadm. N\u1ebfu m\u1ed9t l\u01b0\u1ee3ng l\u1edbn pha such nh\u01b0 v\u1eady t\u1ed3n t\u1ea1i trong pha xi m\u0103ng, c\u00e1c h\u1ea1t tinh th\u1ec3 ph\u00e2n nh\u00e1nh xu\u1ea5t hi\u1ec7n v\u00e0 c\u00e1c h\u1ea1t nh\u1ecf ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u; n\u1ebfu c\u00f3 m\u1ed9t h\u1ea1t l\u1edbn pha ,, c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng m\u1ed9t kho\u1ea3ng c\u00e1ch d\u00e0i, do \u0111\u00f3 c\u00f3 th\u00f4ng tin r\u1eb1ng pha is l\u00e0 nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n \u0111\u00e3 b\u1eaft \u0111\u1ea7u h\u00ecnh th\u00e0nh.<\/div>\n<div>Trong tr\u01b0\u1eddng h\u1ee3p kh\u00e1c, khi h\u1ee3p kim \u1edf v\u00f9ng hai pha (WC +), h\u1ee3p kim W s\u1ebd \u0111\u01b0\u1ee3c k\u1ebft t\u1ee7a d\u01b0\u1edbi d\u1ea1ng Co3W t\u1eeb pha li\u00ean k\u1ebft sau khi h\u1ee3p kim cacbon th\u1ea5p \u0111\u01b0\u1ee3c \u1ee7. Qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng c\u00f4ng th\u1ee9c sau \u0111\u00e2y. Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng trung t\u00e2m Co \u2192 Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng trung t\u00e2m Co + Co3W Do \u0111\u00f3, h\u1ee3p kim WC-Co hai pha c\u00f3 h\u00e0m l\u01b0\u1ee3ng carbon th\u1ea5p n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh c\u1ea5u tr\u00fac ba pha (WC + + CoW) sau khi \u1ee7. H\u00ecnh 2 cho th\u1ea5y \u0111\u01b0\u1eddng cong h\u00f2a tan c\u1ee7a W \u0111\u1ed1i v\u1edbi h\u1ee3p kim WC-Co hai pha \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 \u1ee7 kh\u00e1c nhau. \u0110\u01b0\u1eddng cong l\u00e0 \u0111\u01b0\u1eddng cong nhi\u1ec7t \u0111\u1ed9 t\u1edbi h\u1ea1n \u0111\u1ed1i v\u1edbi h\u1ee3p kim hai pha \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh h\u1ee3p kim ba pha (WC + \u03b3 + CoW): tr\u00ean nhi\u1ec7t \u0111\u1ed9 \u0111\u01b0\u1eddng cong K\u1ebft qu\u1ea3 luy\u1ec7n kim trong h\u1ee3p kim vi c\u1ea5u tr\u00fac hai pha; \u1ee6 \u1edf nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi \u0111\u01b0\u1eddng cong mang l\u1ea1i c\u1ea5u tr\u00fac ba pha c\u00f3 ch\u1ee9a Co3W.<\/div>\n<h2>3. \u1ea2nh h\u01b0\u1edfng c\u1ee7a qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a h\u1ee3p kim c\u1ee9ng<\/h2>\n<div>(1) \u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n V\u00ec WC c\u00f3 \u0111\u1ed9 h\u00f2a tan r\u1eafn kh\u00e1c nhau \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau trong Co, n\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng l\u00e0m c\u1ee9ng k\u1ebft t\u1ee7a c\u1ee7a ch\u1ea5t k\u1ebft d\u00ednh b\u1eb1ng c\u00e1ch l\u00e0m ngu\u1ed9i nhi\u1ec7t \u0111\u1ed9 dung d\u1ecbch r\u1eafn v\u00e0 l\u00e3o h\u00f3a ti\u1ebfp theo. L\u00e0m ngu\u1ed9i c\u00f3 th\u1ec3 \u1ee9c ch\u1ebf s\u1ef1 k\u1ebft t\u1ee7a c\u1ee7a WC v\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i \u0111\u1ed3ng \u0111\u1eb3ng c\u1ee7a Co (Co d\u00e0y \u0111\u1eb7c h\u00ecnh l\u1ee5c gi\u00e1c, Co m\u1eb7t trung t\u00e2m kh\u1ed1i). Ng\u01b0\u1eddi ta \u0111\u00e3 b\u00e1o c\u00e1o r\u1eb1ng \u0111\u1ed9 b\u1ec1n c\u1ee7a h\u1ee3p kim ch\u1ee9a coban 40% c\u00f3 th\u1ec3 t\u0103ng th\u00eam kho\u1ea3ng 10% sau khi l\u00e0m ngu\u1ed9i, nh\u01b0ng \u0111\u1ed9 b\u1ec1n c\u1ee7a h\u1ee3p kim ch\u1ee9a coban 10% b\u1ecb gi\u1ea3m sau khi l\u00e0m ngu\u1ed9i. Xem x\u00e9t r\u1eb1ng l\u01b0\u1ee3ng coban c\u00f3 trong cacbua xi m\u0103ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong k\u1ef9 thu\u1eadt th\u01b0\u1eddng l\u00e0 10% \u0111\u1ebfn 37%, \u1ea3nh h\u01b0\u1edfng c\u1ee7a x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 h\u1ee3p kim l\u00e0 r\u1ea5t nh\u1ecf. V\u00ec v\u1eady, m\u1ed9t ng\u01b0\u1eddi n\u00e0o \u0111\u00f3 d\u00e1m kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng d\u1eadp t\u1eaft kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 t\u0103ng s\u1ee9c m\u1ea1nh cho h\u1ee3p kim W-Co. \u1ee6 c\u0169ng l\u00e0m gi\u1ea3m \u0111\u1ed9 b\u1ec1n c\u1ee7a h\u1ee3p kim, nh\u01b0 trong B\u1ea3ng 1 v\u00e0 3. T\u00ednh ch\u1ea5t c\u1ee7a cacbua vonfram thay \u0111\u1ed5i theo l\u01b0\u1ee3ng Co ch\u1ee9a v\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a h\u1ea1t, nh\u01b0 trong H\u00ecnh 4.<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/141d2f_cf920998930747278f36137ff4f05711mv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>H\u00ecnh 2 \u0110\u01b0\u1eddng cong h\u00f2a tan r\u1eafn c\u1ee7a vonfram trong h\u1ee3p kim hai pha WC-10%Co<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/141d2f_8f37298a2f7944dda02f2061585f1aa3mv2.png\" alt=\"\" title=\"\"><\/p>\n<div>H\u00ecnh 3 \u1ea2nh h\u01b0\u1edfng c\u1ee7a \u1ee7 \u1edf 800 \u00b0 C \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n c\u1ee7a n\u1ed9i dung WC-10%Co<\/div>\n<p><iframe src=\"\/\/static.usrfiles.com\/html\/0580b8_ccb891ebb94b54cda9e5f2eb680658e6.html\"><\/p>\n<div>B\u1ea3ng 1 \u1ea2nh h\u01b0\u1edfng c\u1ee7a \u1ee7 \u1edf 650 \u00b0 C \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n c\u1ee7a h\u1ee3p kim WC-11%<\/div>\n<div>(2) \u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng Khi h\u1ee3p kim WC-Co gi\u00e0 \u0111i, Co3WCX v\u00e0 Co3WCX k\u1ebft t\u1ee7a \u1edf pha m\u00f4 d\u00e0y \u0111\u1eb7c, do \u0111\u00f3 \u0111\u1ed9 c\u1ee9ng c\u1ee7a h\u1ee3p kim s\u1ebd t\u0103ng, nh\u01b0ng \u0111\u1ed9 c\u1ee9ng c\u1ee7a h\u1ee3p kim s\u1ebd gi\u1ea3m khi sau \u0111\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh Co3W. D\u1eef li\u1ec7u th\u1eed nghi\u1ec7m H.Jonsson \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong H\u00ecnh 5 v\u00e0 H\u00ecnh 6. M\u1eb7c d\u00f9 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a Co3WCX sau khi x\u1eed l\u00fd nhi\u1ec7t gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u1ee9ng c\u1ee7a h\u1ee3p kim m\u1ed9t ch\u00fat, xem x\u00e9t th\u1eddi gian x\u1eed l\u00fd nhi\u1ec7t l\u00e2u h\u01a1n v\u00e0 gi\u1ea3m \u0111\u1ed9 b\u1ec1n u\u1ed1n, ng\u01b0\u1eddi ta cho r\u1eb1ng s\u1ef1 k\u1ebft t\u1ee7a c\u1ee7a pha Co3WCX \u0111\u1ec3 l\u00e0m cho pha k\u1ebft d\u00ednh ph\u00e2n t\u00e1n v\u00e0 \u0111\u00f4ng c\u1ee9ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 \u0111\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c l\u1edbp m\u1edbi. M\u1ed9t c\u00e1ch kh\u00e1c n\u00ean \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y. .<\/div>\n<div>(3) X\u1eed l\u00fd nhi\u1ec7t \u0111i\u1ec3n h\u00ecnh c\u1ee7a cacbua xi m\u0103ng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong B\u1ea3ng 2.<\/div>\n<p><iframe src=\"\/\/static.usrfiles.com\/html\/0580b8_08e887e694fae2dd9e03969833351b47.html\"><\/iframe><\/p>\n<p><\/iframe><\/p>\n<div>B\u1ea3ng 2 quy tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t \u0111i\u1ec3n h\u00ecnh c\u1ee7a h\u1ee3p kim c\u1ee9ng<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/141d2f_608adfbe9fb94d77835f837044c7bbfdmv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>H\u00ecnh 4 C\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a cacbua xi m\u0103ng WC thay \u0111\u1ed5i theo l\u01b0\u1ee3ng Co v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/141d2f_040ad6360170451c9431ef275475cf29mv2.png\" alt=\"\" title=\"\"><\/p>\n<div>H\u00ecnh 5 M\u1ed1i quan h\u1ec7 gi\u1eefa \u0111\u1ed9 c\u1ee9ng v\u00e0 th\u1eddi gian l\u00e3o h\u00f3a c\u1ee7a pha ch\u1ea5t k\u1ebft d\u00ednh h\u1ee3p kim WC-Co<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/141d2f_09d00f5680f04487a0781d6ba7be7936mv2.png\" alt=\"\" title=\"\"><\/p>\n<div>H\u00ecnh 6 M\u1ed1i quan h\u1ec7 gi\u1eefa \u0111\u1ed9 c\u1ee9ng v\u00e0 th\u1eddi gian l\u00e3o h\u00f3a c\u1ee7a h\u1ee3p kim WC-Co<\/div>\n<h2>4. L\u1edbp ph\u1ee7 h\u1ee3p kim c\u1ee9ng<\/h2>\n<div>\u0110\u1ec3 c\u1ea3i thi\u1ec7n h\u01a1n n\u1eefa kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n c\u1ee7a h\u1ee3p kim c\u1ee9ng, m\u1ed9t v\u1eadt li\u1ec7u c\u1ee9ng nh\u01b0 TiC ho\u1eb7c TiN c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eafng \u0111\u1ecdng h\u01a1i tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a ch\u00fang. V\u1eadt li\u1ec7u ph\u1ee7 ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u sau:<\/div>\n<div>1 N\u00f3 ph\u1ea3i c\u00f3 \u0111\u1ed9 c\u1ee9ng cao \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao.<\/div>\n<div>2 c\u00f3 t\u00ednh \u1ed5n \u0111\u1ecbnh h\u00f3a h\u1ecdc t\u1ed1t.<\/div>\n<div>3 n\u00ean c\u00f3 \u0111\u1ed9 th\u1ea5m v\u00e0 kh\u00f4ng c\u00f3 l\u1ed7 kh\u00ed.<\/div>\n<div>4 V\u1eadt li\u1ec7u c\u1ea7n x\u1eed l\u00fd ph\u1ea3i c\u00f3 h\u1ec7 s\u1ed1 ma s\u00e1t th\u1ea5p.<\/div>\n<div>5 \u0110\u1ec3 li\u00ean k\u1ebft ch\u1eafc ch\u1eafn v\u1edbi th\u00e2n c\u00f4ng c\u1ee5. 6 \u0110\u00f3 l\u00e0 kinh t\u1ebf v\u00e0 d\u1ec5 d\u00e0ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t. Trong th\u1ebf gi\u1edbi ng\u00e0y nay, cacbua xi m\u0103ng c\u0169ng l\u00e0 v\u1eadt li\u1ec7u ch\u00ednh c\u1ee7a d\u1ee5ng c\u1ee5 c\u1eaft. N\u00f3 c\u0169ng \u0111ang m\u1edf r\u1ed9ng chia s\u1ebb \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh trong c\u00e1c khu\u00f4n m\u1eabu, c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng v\u00e0 c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c.<\/div>\n<div>T\u00f3m l\u1ea1i, n\u00f3 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c kh\u00eda c\u1ea1nh sau:<\/div>\n<div>1 Quay trong c\u1eaft li\u00ean t\u1ee5c.<\/div>\n<div>2 H\u1ed3 s\u01a1 quay v\u00f2ng v\u1edbi \u00edt thay \u0111\u1ed5i v\u1ec1 \u0111\u1ed9 s\u00e2u c\u1ee7a dao.<\/div>\n<div>3 y\u00eau c\u1ea7u xe kh\u00f4ng li\u00ean t\u1ee5c v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 th\u1ea5p.<\/div>\n<h2>4 Phay m\u1eb7t t\u1ed1c \u0111\u1ed9 cao b\u1eb1ng th\u00e9p ho\u1eb7c gang x\u00e1m.<\/h2>\n<div>\u01afu \u0111i\u1ec3m c\u1ee7a cacbua tr\u00e1ng xi m\u0103ng r\u1ea5t nhi\u1ec1u v\u00e0 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft nh\u01b0 sau:<\/div>\n<div>1 t\u00ednh linh ho\u1ea1t t\u1ed1t.<\/div>\n<div>2 c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a b\u1ec1 m\u1eb7t c\u1eaft ph\u00f4i.<\/div>\n<div>3 T\u1ed1c \u0111\u1ed9 c\u1eaft \u0111\u01b0\u1ee3c t\u0103ng l\u00ean r\u1ea5t nhi\u1ec1u \u1edf c\u00f9ng tu\u1ed5i th\u1ecd c\u00f4ng c\u1ee5.<\/div>\n<div>4 \u1ede c\u00f9ng t\u1ed1c \u0111\u1ed9 c\u1eaft, tu\u1ed5i th\u1ecd dao c\u00f3 th\u1ec3 t\u0103ng l\u00ean.<\/div>\n<div>(1) V\u1eadt li\u1ec7u ph\u1ee7 H\u1ea7u h\u1ebft c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t n\u01b0\u1edbc ngo\u00e0i s\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 TiC \u0111\u1ec3 ch\u00e8n l\u1edbp ph\u1ee7, ti\u1ebfp theo l\u00e0 l\u1edbp ph\u1ee7 TiN. L\u1edbp ph\u1ee7 h\u1ed7n h\u1ee3p TiC-TiN v\u00e0 l\u1edbp ph\u1ee7 dung d\u1ecbch r\u1eafn Ti (C \u2022 N) t\u0103ng d\u1ea7n. Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, nhi\u1ec1u l\u1edbp ph\u1ee7 composite m\u1edbi c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n.<\/div>\n<div>TiC hi\u1ec7n l\u00e0 m\u1ed9t v\u1eadt li\u1ec7u ph\u1ee7 l\u00fd t\u01b0\u1edfng, \u01b0u \u0111i\u1ec3m c\u1ee7a n\u00f3 l\u00e0 \u0111\u1ed9 c\u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ed9 b\u1ec1n cao, ch\u1ed1ng oxy h\u00f3a t\u1ed1t v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n mi\u1ec7ng h\u1ed1; Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a n\u00f3 l\u00e0 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 c\u01a1 th\u1ec3 l\u1edbn h\u01a1n, v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00f2n b\u00ean k\u00e9m. So v\u1edbi l\u1edbp ph\u1ee7 TiC, l\u1edbp ph\u1ee7 TiN c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m sau: l\u01b0\u1ee1i \u0111\u01b0\u1ee3c tr\u00e1ng c\u00f3 xu h\u01b0\u1edbng t\u1ea1o th\u00e0nh mi\u1ec7ng h\u1ed1 th\u1ea5p khi c\u1eaft v\u00e0 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a n\u00f3 g\u1ea7n v\u1edbi l\u1edbp n\u1ec1n v\u00e0 c\u00f3 \u0111\u1ed9 nh\u1ea1y th\u1ea5p \u0111\u1ed1i v\u1edbi s\u1ed1c nhi\u1ec7t v\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng h\u00ecnh th\u00e0nh kh\u1ed1i u. Ch\u1ed1ng m\u00e0i m\u00f2n l\u00e0 t\u1ed1t, v\u00e0 n\u00f3 d\u1ec5 d\u00e0ng \u0111\u1ec3 g\u1eedi v\u00e0 ki\u1ec3m so\u00e1t. Nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 \u0111\u1ed9 b\u00e1m d\u00ednh v\u1edbi ch\u1ea5t n\u1ec1n k\u00e9m v\u1eefng ch\u1eafc. L\u1edbp ph\u1ee7 h\u1ed7n h\u1ee3p TiC-TiN v\u00e0 l\u1edbp ph\u1ee7 dung d\u1ecbch r\u1eafn Ti (C \u2022 N) l\u00e0 l\u1edbp ph\u1ee7 m\u1edbi \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u0103m 1970 v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng th\u00e0nh c\u00f4ng trong s\u1ea3n xu\u1ea5t.<\/div>\n<div>L\u1edbp ph\u1ee7 c\u1ee9ng composite c\u00f3 m\u1ed9t t\u01b0\u01a1ng lai \u0111\u1ea7y h\u1ee9a h\u1eb9n.<\/div>\n<div>(2) Quy tr\u00ecnh ph\u1ee7 Qu\u00e1 tr\u00ecnh v\u00e0 thi\u1ebft b\u1ecb \u0111\u1ec3 s\u1ea3n xu\u1ea5t ch\u00e8n l\u1edbp ph\u1ee7 TiC trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc l\u00e0 t\u01b0\u01a1ng t\u1ef1 nhau. \u0110\u1eb7c \u0111i\u1ec3m chung l\u00e0 c\u00e1c h\u1ea1t cacbua \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u01b0\u1ee3c \u0111\u1eb7t trong bu\u1ed3ng ph\u1ea3n \u1ee9ng l\u1eafng, v\u00e0 sau \u0111\u00f3 H2 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t mang \u0111\u1ec3 \u0111\u01b0a TiCl4 v\u00e0 metan v\u00e0o bu\u1ed3ng ph\u1ea3n \u1ee9ng. Ph\u1ea3n \u1ee9ng l\u1eafng \u0111\u1ecdng. Nhi\u1ec7t \u0111\u1ed9 ph\u1ea3n \u1ee9ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u1edf kho\u1ea3ng 1000 \u00b0 C. Ph\u01b0\u01a1ng ph\u00e1p gia nhi\u1ec7t h\u1ea7u nh\u01b0 lu\u00f4n lu\u00f4n l\u00e0 s\u01b0\u1edfi \u1ea5m c\u1ea3m \u1ee9ng t\u1ea7n s\u1ed1 cao, v\u00e0 \u00e1p su\u1ea5t l\u1eafng \u0111\u1ecdng ch\u1ee7 y\u1ebfu l\u00e0 \u00e1p su\u1ea5t \u00e2m. M\u1eb7c d\u00f9 m\u1ed9t l\u1edbp ph\u1ee7 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eafng \u0111\u1ecdng d\u01b0\u1edbi \u00e1p su\u1ea5t b\u00ecnh th\u01b0\u1eddng, vi\u1ec7c s\u1eed d\u1ee5ng l\u1eafng \u0111\u1ecdng \u00e1p su\u1ea5t \u00e2m hi\u1ec7u qu\u1ea3 h\u01a1n v\u00e0 l\u1edbp ph\u1ee7 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 d\u00e0y \u0111\u1eb7c h\u01a1n. \u0110\u1eb7c bi\u1ec7t l\u00e0 khi s\u1ed1 l\u01b0\u1ee3ng l\u01b0\u1ee1i l\u1eafng \u0111\u1ecdng l\u1edbn, l\u1ee3i th\u1ebf c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng l\u1eafng \u0111\u1ecdng \u00e1p su\u1ea5t \u00e2m l\u00e0 \u0111\u1eb7c bi\u1ec7t \u0111\u00e1ng k\u1ec3.<\/div>\n<div>(3) \u0110\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 \u0110\u1ed9 d\u00e0y c\u1ee7a l\u1edbp ph\u1ee7 TiC th\u01b0\u1eddng l\u00e0 5 ~ 8\u03bcm \u0111\u1ed1i v\u1edbi c\u00e1c l\u1edbp ph\u1ee7 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc. \u0110\u1ed9 d\u00e0y c\u1ee7a l\u1edbp ph\u1ee7 TiN n\u1eb1m trong kho\u1ea3ng 8 ~ 12\u03bcm. (4) Hi\u1ec7u su\u1ea5t l\u1edbp ph\u1ee7 ma tr\u1eadn l\u1edbp ph\u1ee7 b\u1ecb \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn b\u1edfi th\u00e0nh ph\u1ea7n ma tr\u1eadn, ma tr\u1eadn l\u01b0\u1ee1i \u0111\u01b0\u1ee3c ph\u1ee7 ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u sau: 1 c\u00f3 \u0111\u1ed9 b\u1ec1n t\u1ed1t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u1ebbo. 2 c\u00f3 \u0111\u1ed9 c\u1ee9ng cao. 3 Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a n\u00f3 ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi v\u1eadt li\u1ec7u ph\u1ee7, v\u00e0 \u0111\u1ed9 b\u00e1m d\u00ednh l\u1eabn nhau ph\u1ea3i ch\u1eafc ch\u1eafn. 4 kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 l\u1eafng cao. 5 H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u1ee7a v\u1eadt li\u1ec7u ph\u1ee7. 6 c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t t\u1ed1t. Khi gia c\u00f4ng v\u1eadt li\u1ec7u th\u00e9p, n\u00ean ch\u1ecdn h\u1ee3p kim WiC-TC-Co ho\u1eb7c WC-TiC-TaC-Co; khi gia c\u00f4ng gang ho\u1eb7c kim lo\u1ea1i m\u00e0u, n\u00ean ch\u1ecdn h\u1ee3p kim WC-Co. C\u00e1c v\u1eadt li\u1ec7u x\u1eed l\u00fd kh\u00e1c nhau, c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ma tr\u1eadn h\u1ee3p kim l\u1edbp ph\u1ee7 c\u0169ng kh\u00e1c nhau, c\u00f3 ngh\u0129a l\u00e0 l\u1edbp ph\u1ee7 c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a, b\u1ea5t k\u1ef3 qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t n\u00e0o kh\u00f4ng ph\u1ea3i l\u00e0 thu\u1ed1c ch\u1eefa b\u00e1ch b\u1ec7nh, mi\u1ec5n l\u00e0 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a hi\u1ec7u qu\u1ea3 c\u1ee7a ch\u00fang.<\/div>\n<h2>5. \u1ee8ng d\u1ee5ng c\u1ee7a cacbua xi m\u0103ng trong s\u1ea3n xu\u1ea5t d\u1ee5ng c\u1ee5 v\u00e0 ch\u1ebft<\/h2>\n<div>(1) Trong l\u0129nh v\u1ef1c d\u1ee5ng c\u1ee5 c\u1eaft, cacbua xi m\u0103ng duy tr\u00ec hi\u1ec7u su\u1ea5t c\u1eaft tuy\u1ec7t v\u1eddi ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 cao 800-1000 \u00b0 C. N\u00f3 ph\u00f9 h\u1ee3p \u0111\u1ec3 c\u1eaft nhanh \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 c\u00f3 \u00fd ngh\u0129a thi\u1ebft th\u1ef1c \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 kinh t\u1ebf. Do \u0111\u00f3, n\u00f3 \u0111ang d\u1ea7n thay th\u1ebf th\u00e9p c\u00f4ng c\u1ee5 t\u1ed1c \u0111\u1ed9 cao. L\u00e0m d\u1ee5ng c\u1ee5. Trong n\u0103m 2017, n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i kh\u00f4ng ch\u1ec9 trong m\u00e1y ti\u1ec7n, m\u00e1y b\u00e0o, dao nh\u00e0m ch\u00e1n, m\u00e1y c\u1eaft ba l\u01b0\u1ee1i, m\u00e1y c\u1eaft b\u1ebf v\u00e0 nh\u00e0 m\u00e1y cu\u1ed1i, m\u00e0 c\u00f2n v\u1edbi s\u1ef1 th\u00fac \u0111\u1ea9y li\u00ean t\u1ee5c c\u1ee7a s\u1ea3n xu\u1ea5t th\u00f4ng minh v\u00e0 c\u00f4ng nghi\u1ec7p 4.0. R\u1ed9ng h\u01a1n, mong ch\u1edd v\u1eadt li\u1ec7u C\u00f4ng c\u1ee5 t\u01b0\u01a1ng lai ch\u1eafc ch\u1eafn l\u00e0 th\u1ebf gi\u1edbi c\u1ee7a h\u1ee3p kim c\u1ee9ng.<\/div>\n<div>(2) Trong l\u0129nh v\u1ef1c khu\u00f4n m\u1eabu, nhi\u1ec1u lo\u1ea1i khu\u00f4n v\u1ebd d\u00e2y v\u00e0 khu\u00f4n v\u1ebd d\u00e2y c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng cacbua xi m\u0103ng. Ch\u1ebft ti\u1ebfn b\u1ed9 \u0111\u1ec3 l\u00e0m r\u0103ng d\u00e2y k\u00e9o s\u1eed d\u1ee5ng h\u1ee3p kim c\u1ee9ng YG8 v\u00e0 YG15 \u0111\u1ec3 l\u00e0m khu\u00f4n v\u1ebd \u0111\u01b0\u1eddng k\u00ednh l\u1edbn v\u00e0 ch\u1ebft c\u1ee9ng YG20C. H\u1ee3p kim cho nhi\u1ec1u v\u1ecb tr\u00ed ti\u1ebfn b\u1ed9 ch\u1ebft. Ch\u1ebf \u0111\u1ed9 kh\u00f4ng t\u1eeb t\u00ednh th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng cacbua xi m\u0103ng YG15 v\u00e0 YG20. Tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng c\u1ee7a d\u00e2y r\u00fat ion nit\u01a1 YG8 \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean g\u1ea5p \u0111\u00f4i. N\u00f3i t\u00f3m l\u1ea1i, vi\u1ec7c \u00e1p d\u1ee5ng cacbua xi m\u0103ng trong khu\u00f4n ng\u00e0y c\u00e0ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft b\u1ecb \u0111o v\u00e0 c\u00e1c ng\u00e0nh c\u00f4ng c\u1ee5 kh\u00e1c v\u00e0 s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 chi ti\u1ebft.<\/div>\n<h2>6. K\u1ebft lu\u1eadn<\/h2>\n<div>Sau khi x\u1eed l\u00fd nhi\u1ec7t th\u00edch h\u1ee3p c\u1ee7a h\u1ee3p kim c\u1ee9ng, m\u1eb7c d\u00f9 n\u00f3 c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n m\u1ed9t ch\u00fat \u0111\u1ed9 c\u1ee9ng, nh\u01b0ng c\u00f3 t\u00ednh \u0111\u1ebfn th\u1eddi gian x\u1eed l\u00fd nhi\u1ec7t l\u00e2u h\u01a1n v\u00e0 g\u00e2y b\u1ea5t l\u1ee3i cho c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n, v\u00ec v\u1eady x\u1eed l\u00fd nhi\u1ec7t n\u00ean c\u00f3 \u0111\u1ed9 \u0111\u1eb7c hi\u1ec7u nh\u1ea5t \u0111\u1ecbnh. L\u1edbp ph\u1ee7 b\u1ec1 m\u1eb7t c\u1ee7ng c\u1ed1 con \u0111\u01b0\u1eddng m\u1edbi cho vi\u1ec7c s\u1eed d\u1ee5ng cacbua xi m\u0103ng, v\u00e0 ch\u1ea5t n\u1ec1n, v\u1eadt li\u1ec7u, quy tr\u00ecnh v\u00e0 \u0111\u1ed9 d\u00e0y c\u0169ng \u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a.<\/div>\n<\/div>\n<\/div>\n<p><!-- .vgblk-rw-wrapper --><\/p>","protected":false},"excerpt":{"rendered":"<p>Cemented carbide(hardmetal) is a general term for alloys composed of carbides, nitrides, borides, or silicides of high melting point metals (W, Mo, Ti, V, Ta, etc.). Divided into two major categories of casting and sintering. The cast alloy has high brittleness and low toughness, and has little practical application value. Widely used are sintered alloys,&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"class_list":["post-1857","post","type-post","status-publish","format-standard","hentry","category-materials-weekly"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=1857"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1857\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=1857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=1857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=1857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}