{"id":1650,"date":"2019-05-22T02:47:38","date_gmt":"2019-05-22T02:47:38","guid":{"rendered":"http:\/\/www.meetyoucarbide.com\/single-post-characteristics-of-cemented-carbide\/"},"modified":"2020-05-04T13:12:06","modified_gmt":"2020-05-04T13:12:06","slug":"characteristics-of-cemented-carbide","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/dac-diem-cua-xi-mang-cacbua\/","title":{"rendered":"\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a cacbua xi m\u0103ng"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">\n<div>\n<div>Cacbua xi m\u0103ng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng h\u1ee3p ch\u1ea5t c\u1ee9ng kim lo\u1ea1i ch\u1ecbu l\u1eeda (pha c\u1ee9ng), th\u01b0\u1eddng l\u00e0 cacbua v\u00e0 ch\u1ea5t k\u1ebft d\u00ednh kim lo\u1ea1i (pha li\u00ean k\u1ebft) thu \u0111\u01b0\u1ee3c b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p luy\u1ec7n kim b\u1ed9t ,. L\u00e0 m\u1ed9t h\u1ee3p kim c\u1ee9ng cho d\u1ee5ng c\u1ee5 c\u1eaft, c\u00e1c cacbua th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 cacbua vonfram (WC), cacbua titan (TiC) v\u00e0 cacbua tantalum (TaC), cacbua niobi (NbC), v.v. cacbua xi m\u0103ng ph\u1ee5 thu\u1ed9c ch\u1ee7 y\u1ebfu v\u00e0o h\u00e0m l\u01b0\u1ee3ng coban.<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_0104c5eb7ca443a69f7b7d09e19d8227mv2-1.png\" alt=\"\" title=\"\"><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_60734f182ff74f24b8661120a6519174mv2-1.png\" alt=\"\" title=\"\"><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_9e5d90b7b82b4dc5820e62b632e0724amv2-1.png\" alt=\"\" title=\"\"><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_a477ffbe512a47a687bf703b5407fb08mv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>Do nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y cao, \u0111\u1ed9 c\u1ee9ng cao (xem B\u1ea3ng 1-1), \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh h\u00f3a h\u1ecdc t\u1ed1t v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t m\u00e0 cacbua trong cacbua xi m\u0103ng c\u00f3 v\u00e0 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn v\u1eadt li\u1ec7u carbon nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu m\u00e0i m\u00f2n v\u00e0 nhi\u1ec7t \u0111i\u1ec7n tr\u1edf cao h\u01a1n th\u00e9p t\u1ed1c \u0111\u1ed9 cao.<\/div>\n<div> Th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a pha c\u1ee9ng h\u1ee3p kim c\u1ee9ng l\u00e0 WC. WC c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00f2n t\u1ed1t. M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 cacbua c\u00f3 c\u00f9ng \u0111\u1ed9 c\u1ee9ng v\u00e0 WC, nh\u01b0ng kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00f2n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. B\u00ean c\u1ea1nh \u0111\u00f3, WC c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 n\u0103ng su\u1ea5t cao h\u01a1n (B\u1ea3ng 1-2), do \u0111\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u1ebbo c\u1ee7a n\u00f3 l\u00e0 t\u1ed1t h\u01a1n. WC c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t t\u1ed1t, \u0111\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng \u0111\u1eb7c t\u00ednh mong mu\u1ed1n nh\u1ea5t \u0111\u1ec3 ch\u1ebf t\u1ea1o v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5. Ngo\u00e0i ra. WC c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t th\u1ea5p b\u1eb1ng 1\/3 th\u00e9p. M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u1ee7a WC g\u1ea5p ba l\u1ea7n th\u00e9p v\u00e0 m\u00f4 \u0111un xo\u1eafn c\u1ee7a n\u00f3 g\u1ea5p \u0111\u00f4i th\u00e9p. Do \u0111\u00f3, c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a cacbua xi m\u0103ng 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. nh\u1eefng \u0111\u1eb7c t\u00ednh tuy\u1ec7t v\u1eddi n\u00e0y c\u1ee7a WC \u0111\u00e3 \u0111\u01b0\u1ee3c chuy\u1ec3n qua m\u1ed9t h\u1ee3p kim c\u1ee9ng v\u1edbi th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a n\u00f3.<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_c2da496d930948a39462d73201065bf2mv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>So v\u1edbi th\u00e9p t\u1ed1c \u0111\u1ed9 cao, \u0111\u1ed9 c\u1ee9ng c\u1ee7a cacbua xi m\u0103ng l\u00e0 HRA89-94, cao h\u01a1n nhi\u1ec1u so v\u1edbi \u0111\u1ed9 c\u1ee9ng c\u1ee7a HSS (HRC63-70 ho\u1eb7c HRA83-86.6). Nhi\u1ec7t \u0111\u1ed9 c\u1eaft t\u1ed1i \u0111a cho ph\u00e9p \u0111\u1ed1i v\u1edbi cacbua xi m\u0103ng c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi 800-1000 \u00b0 C tr\u1edf l\u00ean, c\u00f3 th\u1ec3 cao h\u01a1n nhi\u1ec1u so v\u1edbi c\u1ee7a HSS (550-650 \u2103). \u0110\u1ed9 c\u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a cacbua xi m\u0103ng c\u00f3 th\u1ec3 l\u00e0 HRA82-87 \u1edf 540 \u00b0 C, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0111\u1ed9 c\u1ee9ng nhi\u1ec7t \u0111\u1ed9 th\u00f4ng th\u01b0\u1eddng c\u1ee7a th\u00e9p t\u1ed1c \u0111\u1ed9 cao. \u0110\u1ed9 c\u1ee9ng \u1edf 760 \u00b0 C l\u00e0 HRA 77-85 v\u00e0 c\u00f3 th\u1ec3 duy tr\u00ec \u1edf HRA 73-76 \u1edf m\u00f4i tr\u01b0\u1eddng 1000-1100 \u00b0 C. B\u00ean c\u1ea1nh \u0111\u00f3, kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n c\u1ee7a cacbua xi m\u0103ng cao h\u01a1n 16-20 l\u1ea7n so v\u1edbi HSS t\u1ed1t nh\u1ea5t . Do \u0111\u1ed9 c\u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n, cacbua xi m\u0103ng c\u00f3 hi\u1ec7u su\u1ea5t c\u1eaft cao h\u01a1n nhi\u1ec1u so v\u1edbi th\u00e9p t\u1ed1c \u0111\u1ed9 cao v\u00e0 c\u00f3 th\u1ec3 t\u0103ng \u0111\u1ed9 b\u1ec1n c\u1ee7a d\u1ee5ng c\u1ee5 l\u00ean v\u00e0i ch\u1ee5c l\u1ea7n. Khi gia c\u00f4ng th\u00e9p k\u1ebft c\u1ea5u th\u00f4ng th\u01b0\u1eddng, t\u1ed1c \u0111\u1ed9 c\u1eaft cho ph\u00e9p cao h\u01a1n 4-10 l\u1ea7n so v\u1edbi c\u00f4ng c\u1ee5 th\u00e9p t\u1ed1c \u0111\u1ed9 cao.<\/div>\n<div>L\u00e0 m\u1ed9t v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 c\u1eaft, cacbua xi m\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i (xem B\u1ea3ng 1-3)). Trong quy tr\u00ecnh ti\u1ec7n, ngo\u1ea1i tr\u1eeb m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng nh\u1ecf c\u00e1c l\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf v\u00e0 m\u1ed9t s\u1ed1 ph\u00f4i kim lo\u1ea1i m\u00e0u, h\u1ea7u h\u1ebft t\u1ea5t c\u1ea3 ch\u00fang \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng c\u00e1c c\u00f4ng c\u1ee5 ti\u1ec7n cacbua. Trong qu\u00e1 tr\u00ecnh khoan, ngo\u00e0i c\u00e1c m\u00e1y khoan cacbua hi\u1ec7n c\u00f3, m\u00e1y khoan cacbua, m\u00e1y khoan l\u1ed7 s\u00e2u, m\u00e1y khoan cacbua v\u00e0 m\u00e1y khoan cacbua c\u00f3 th\u1ec3 l\u1eadp ch\u1ec9 m\u1ee5c c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u00e0nh c\u00f4ng \u0111\u1ec3 luy\u1ec7n th\u00e9p. Ngo\u00e0i ra, c\u00e1c nh\u00e0 m\u00e1y cu\u1ed1i cacbua \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. C\u00e1c lo\u1ea1i kh\u00e1c nh\u01b0 m\u0169i khoan, m\u00e1y nghi\u1ec1n cu\u1ed1i, b\u00e1nh r\u0103ng m\u00f4 \u0111un nh\u1ecf, b\u00e1nh r\u0103ng m\u00f4 \u0111un v\u1eeba v\u00e0 l\u1edbn cho b\u1ec1 m\u1eb7t r\u0103ng c\u1ee9ng (nh\u01b0 m40 hob v\u00e0 m\u00e1y c\u1eaft pin m12), th\u1ed5 c\u1ea9m v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 kh\u00e1c s\u1eed d\u1ee5ng H\u1ee3p kim c\u1ee9ng c\u0169ng \u0111ang t\u0103ng l\u00ean. M\u1eb7c d\u00f9 t\u1ef7 l\u1ec7 cacbua xi m\u0103ng trong v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 th\u1ea5p h\u01a1n so v\u1edbi HSS v\u00e0 \u0111\u1ee9ng th\u1ee9 hai, nh\u01b0ng t\u1ef7 l\u1ec7 chip c\u1eaft c\u1ee7a n\u00f3 cao t\u1edbi 68%. (Theo gi\u00e1o s\u01b0 v\u1ec1 c\u00f4ng ty cacbua xi m\u0103ng n\u0103m 1979 c\u1ee7a Hoa K\u1ef3 \u0111\u00e3 \u0111\u1ebfn th\u0103m Trung Qu\u1ed1c, t\u1ea1i Hoa K\u1ef3, c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft cacbua \u0111\u00e3 c\u1eaft 80% chip c\u1eaft.). Theo b\u00e1o c\u00e1o, t\u1ea1i m\u1ed9t s\u1ed1 qu\u1ed1c gia, h\u01a1n 90% d\u1ee5ng c\u1ee5 ti\u1ec7n v\u00e0 h\u01a1n 55% dao phay \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng cacbua xi m\u0103ng, v\u00e0 xu h\u01b0\u1edbng n\u00e0y ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n.<\/div>\n<\/div>\n<\/div>\n<p><!-- .vgblk-rw-wrapper --><\/p>","protected":false},"excerpt":{"rendered":"<p>Cemented carbide is made of refractory metal hard compound (hard phase),which is generally a carbide, and metal binder (binding phase)obtained by powder metallurgy method,. As a hard alloy for cutting tools, the commonly used carbides are tungsten carbide (WC), titanium carbide (TiC), and tantalum carbide(TaC), niobium carbide (NbC), etc. The mostly used binder is Co&#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-1650","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\/1650","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=1650"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1650\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=1650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=1650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=1650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}