{"id":22174,"date":"2023-08-25T17:34:33","date_gmt":"2023-08-25T09:34:33","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=22174"},"modified":"2023-08-25T17:35:11","modified_gmt":"2023-08-25T09:35:11","slug":"what-is-hyper-carbide","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/what-is-hyper-carbide\/","title":{"rendered":"Hyper cacbua l\u00e0 g\u00ec?"},"content":{"rendered":"
Hyper carbide = h\u1ee3p kim si\u00eau c\u1ee9ng + carbide xi m\u0103ng<\/p>\n

Ng\u01b0\u1eddi ta \u0111\u1ec1u bi\u1ebft r\u1eb1ng c\u00f3 hai ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng: \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n. Hai y\u1ebfu t\u1ed1 n\u00e0y th\u01b0\u1eddng kh\u00f3 c\u00e2n b\u1eb1ng, gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00e1i b\u1eadp b\u00eanh. Tuy nhi\u00ean, vi\u1ec7c b\u1ed5 sung rheni v\u00e0o h\u1ee3p kim ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 d\u1ebbo dai v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a v\u1eadt li\u1ec7u, bao g\u1ed3m h\u1ee3p kim ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao g\u1ed1c s\u1eaft, g\u1ed1c niken v\u00e0 g\u1ed1c coban.<\/p>\n

 <\/p>\n

\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a hyper carbide<\/h1>\n

V\u1eadt li\u1ec7u si\u00eau cacbua, \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o tr\u00ean n\u1ec1n t\u1ea3ng h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng n\u00f3i chung, k\u1ebft h\u1ee3p m\u1ed9t ho\u1eb7c nhi\u1ec1u th\u00e0nh ph\u1ea7n kim lo\u1ea1i ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao t\u1eeb h\u1ee3p kim si\u00eau c\u1ee9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 rheni, rutheni, osmi, molypden, vanadi, tantali, niobi, v.v. S\u1ef1 bi\u1ebfn \u0111\u1ed5i n\u00e0y mang l\u1ea1i c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u1eb7c bi\u1ec7t bao g\u1ed3m \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao h\u01a1n so v\u1edbi c\u00e1c h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng th\u00f4ng th\u01b0\u1eddng.<\/p>\n

M\u1ed9t hi\u1ec7u \u1ee9ng \u0111\u1eb7c bi\u1ec7t \u0111\u00e1ng ch\u00fa \u00fd \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y khi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf rheni \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng. S\u1ef1 b\u1ed5 sung n\u00e0y l\u00e0m t\u0103ng c\u01b0\u1eddng v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a v\u1eadt li\u1ec7u h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1ec1 \u0111\u1ed9 c\u1ee9ng \u0111\u1ecf v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a h\u1ee3p kim (m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i). Rheni \u00e1p d\u1ee5ng hi\u1ec7u \u1ee9ng t\u0103ng c\u01b0\u1eddng dung d\u1ecbch r\u1eafn cho c\u00e1c kim lo\u1ea1i pha li\u00ean k\u1ebft hi\u1ec7n c\u00f3 (s\u1eaft, coban, niken) trong h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong l\u0129nh v\u1ef1c c\u1eaft t\u1ed1c \u0111\u1ed9 cao v\u00e0 gia c\u00f4ng ch\u00ednh x\u00e1c c\u00e1c v\u1eadt li\u1ec7u kh\u00f3 gia c\u00f4ng nh\u01b0 h\u1ee3p kim ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao g\u1ed1c niken, th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ecbu nhi\u1ec7t, h\u1ee3p kim titan, h\u1ee3p kim \u0111\u1eb7c bi\u1ec7t lo\u1ea1i vonfram-molypden-tantalum-niobi-zirconium-hafni. Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft v\u00e0 khu\u00f4n ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00e1c v\u1eadt li\u1ec7u si\u00eau cacbua m\u1edbi ph\u00e1t tri\u1ec3n n\u00e0y mang l\u1ea1i l\u1ee3i th\u1ebf v\u1ec1 hi\u1ec7u su\u1ea5t chi ph\u00ed phi th\u01b0\u1eddng, thay th\u1ebf c\u00e1c c\u00f4ng c\u1ee5 th\u00f4ng th\u01b0\u1eddng theo m\u1ed9t c\u00e1ch \u0111\u00e1ng ch\u00fa \u00fd.<\/p>\n

 <\/p>\n

Nguy\u00ean l\u00fd t\u0103ng c\u01b0\u1eddng Rhenium trong hi\u1ec7u su\u1ea5t cacbua<\/h1>\n

M\u1ecdi ng\u01b0\u1eddi \u0111\u00e3 nh\u1eadn ra r\u1eb1ng vi\u1ec7c th\u00eam rheni v\u00e0o ch\u1ea5t k\u1ebft d\u00ednh c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng g\u1ed1c WC c\u00f3 th\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a ch\u00fang.<\/p>\n

H\u00ecnh 1 m\u00f4 t\u1ea3 s\u01a1 \u0111\u1ed3 pha W-Co-Re-C trong \u0111i\u1ec1u ki\u1ec7n 9wt% Re + 6wt% Co. S\u01a1 \u0111\u1ed3 n\u00e0y, d\u1ef1a tr\u00ean t\u00e0i li\u1ec7u v\u00e0 k\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m, \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi s\u01a1 \u0111\u1ed3 pha \u0111\u01b0\u1ee3c v\u1ebd l\u1ea1i c\u1ee7a WC-Co trong \u0111i\u1ec1u ki\u1ec7n 10wt% Co. Xem x\u00e9t r\u1eb1ng m\u1eadt \u0111\u1ed9 c\u1ee7a Re cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi Co, h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re v\u1edbi 9wt% Re v\u00e0 6wt% Co ch\u1ee9a t\u1ef7 l\u1ec7 pha ch\u1ea5t k\u1ebft d\u00ednh g\u1ea7n nh\u01b0 gi\u1ed1ng nhau v\u1ec1 m\u1eb7t th\u1ec3 t\u00edch nh\u01b0 v\u1eadt li\u1ec7u WC-Co v\u1edbi 10wt% Co.<\/p>\n

T\u1eeb H\u00ecnh 1, c\u00f3 th\u1ec3 th\u1ea5y r\u00f5 r\u1eb1ng bi\u1ec3u \u0111\u1ed3 pha W-Co-Re-C kh\u00e1c v\u1edbi bi\u1ec3u \u0111\u1ed3 pha W-Co-C. Sau \u0111\u00e2y l\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a bi\u1ec3u \u0111\u1ed3 pha W-Co-Re-C:<\/p>\n

\"H\u00ecnh
H\u00ecnh 1 Bi\u1ec3u \u0111\u1ed3 pha W-Co-Re-C v\u1edbi 9 wt% Re + 6 wt% Co (\u0111\u01b0\u1eddng m\u00e0u \u0111\u1ecf) so v\u1edbi bi\u1ec3u \u0111\u1ed3 pha W-Co-C v\u1edbi 10 wt% Co (\u0111\u01b0\u1eddng m\u00e0u \u0111en).<\/figcaption><\/figure>\n

\u0110\u1ea7u ti\u00ean, trong s\u01a1 \u0111\u1ed3 pha W-Co-Re-C, t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m n\u00f3ng ch\u1ea3y \u0111\u1ec1u d\u1ecbch chuy\u1ec3n v\u1ec1 ph\u00eda nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n. Do \u0111\u00f3, so v\u1edbi v\u1eadt li\u1ec7u WC-Co truy\u1ec1n th\u1ed1ng, h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re \u0111\u00f2i h\u1ecfi ph\u1ea3i thi\u00eau k\u1ebft \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n.<\/p>\n

Secondly, for WC-Co-Re hard metal alloys, the two-phase region without the \u03b7 phase and free carbon slightly shifts towards the higher end at higher carbon contents. This shift is relatively minor but still needs to be considered in the preparation of WC-Co-Re hard metal alloys. It’s worth noting that the width of the two-phase regions in the W-Co-Re-C phase diagram is similar to that in the W-Co-C phase diagram.<\/p>\n

Cu\u1ed1i c\u00f9ng, vi\u1ec7c b\u1ed5 sung rheni v\u00e0o ch\u1ea5t k\u1ebft d\u00ednh l\u00e0m m\u1edf r\u1ed9ng \u0111\u00e1ng k\u1ec3 v\u00f9ng m\u00e0 tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng c\u1ee7a pha WC + \u03b7 + pha l\u1ecfng t\u1ed3n t\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean kho\u1ea3ng 1430\u00b0C. \u0110i\u1ec1u n\u00e0y ng\u1ee5 \u00fd r\u1eb1ng n\u1ebfu h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re c\u00f3 h\u00e0m l\u01b0\u1ee3ng carbon trung b\u00ecnh \u0111\u1ebfn th\u1ea5p v\u00e0 h\u00e0m l\u01b0\u1ee3ng carbon th\u1ea5p \u0111\u01b0\u1ee3c l\u00e0m ngu\u1ed9i nhanh t\u1eeb nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft, ch\u00fang c\u00f3 th\u1ec3 ch\u1ee9a pha \u03b7 thay v\u00ec ph\u00e2n h\u1ee7y th\u00e0nh h\u1ed7n h\u1ee3p WC + Co\/Re \u1ed5n \u0111\u1ecbnh v\u1ec1 m\u1eb7t nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc. Do \u0111\u00f3, h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re sau khi thi\u00eau k\u1ebft ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m ngu\u1ed9i \u1edf t\u1ed1c \u0111\u1ed9 l\u00e0m ngu\u1ed9i t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ph\u00e2n h\u1ee7y ho\u00e0n to\u00e0n pha \u03b7.<\/p>\n

Figure 2 illustrates this, showing that batches of WC-Co-Re with medium to low carbon content contain the encapsulated \u03b7 phase after rapid cooling, while they don’t contain the \u03b7 phase after slow cooling.<\/p>\n

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Fig2\u00a0Under conditions of cooling from the sintering temperature (1520\u00b0C) to 1300\u00b0C at different cooling rates: (a – cooling rate of 4\u00b0C\/minute, b – cooling rate of 0.5\u00b0C\/minute), the microstructure of a medium-grained WC-Co-Re hard metal alloy with 9wt% Re + 6wt% Co and a total carbon content of 5.45 wt%<\/figcaption><\/figure>\n
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H\u00ecnh 3 Thi\u00eau k\u1ebft \u1edf 1520\u00b0C, sau \u0111\u00f3 l\u00e0m ngu\u1ed9i ch\u1eadm \u0111\u1ebfn 1250\u00b0C, c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-10%Co h\u1ea1t trung b\u00ecnh (b\u00ean tr\u00e1i) v\u00e0 h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re h\u1ea1t trung b\u00ecnh (ch\u1ee9a 9wt% Re + 6wt% Co) (b\u00ean ph\u1ea3i)<\/figcaption><\/figure>\n

H\u00ecnh 3 v\u00e0 4 tr\u00ecnh b\u00e0y c\u00e1c c\u1ea5u tr\u00fac vi m\u00f4 \u0111i\u1ec3n h\u00ecnh c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re h\u1ea1t trung b\u00ecnh, so v\u1edbi c\u00e1c v\u1eadt li\u1ec7u WC-Co truy\u1ec1n th\u1ed1ng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb c\u00f9ng m\u1ed9t m\u1ee9c b\u1ed9t WC. T\u1eeb H\u00ecnh 3, r\u00f5 r\u00e0ng l\u00e0 c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re m\u1ecbn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co truy\u1ec1n th\u1ed1ng. Do \u0111\u00f3, rheni \u0111\u00f3ng vai tr\u00f2 l\u00e0 ch\u1ea5t \u1ee9c ch\u1ebf m\u1ea1nh s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t WC, h\u1ea1n ch\u1ebf qu\u00e1 tr\u00ecnh th\u00f4 h\u00f3a c\u1ee7a WC. Theo c\u00e1c ph\u00e1t hi\u1ec7n nghi\u00ean c\u1ee9u, rheni c\u00f3 xu h\u01b0\u1edbng t\u1eadp trung t\u1ea1i ranh gi\u1edbi h\u1ea1t WC\/ch\u1ea5t k\u1ebft d\u00ednh. Do \u0111\u00f3, c\u00f3 th\u1ec3 suy ra r\u1eb1ng vai tr\u00f2 \u1ee9c ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t WC trong v\u1eadt li\u1ec7u WC-Co-Re t\u01b0\u01a1ng t\u1ef1 nh\u01b0 t\u00e1c d\u1ee5ng \u1ee9c ch\u1ebf c\u1ee7a c\u00e1c ch\u1ea5t \u1ee9c ch\u1ebf ph\u00e1t tri\u1ec3n h\u1ea1t truy\u1ec1n th\u1ed1ng t\u1ea1i c\u00e1c giao di\u1ec7n WC-Co.<\/p>\n

H\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re d\u01b0\u1edbi micron th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c th\u00e0nh ph\u1ea7n nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 \u00e1p su\u1ea5t cao, trong \u0111\u00f3 vai tr\u00f2 c\u1ee7a rheni trong vi\u1ec7c \u1ee9c ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t l\u00e0 r\u1ea5t quan tr\u1ecdng. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 lo\u1ea1i b\u1ecf nhu c\u1ea7u ph\u1ea3i th\u00eam ch\u1ea5t \u1ee9c ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t th\u00f4ng th\u01b0\u1eddng v\u00e0o h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re d\u01b0\u1edbi micron. H\u00ecnh 4 v\u00e0 5 m\u00f4 t\u1ea3 c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re d\u01b0\u1edbi micron kh\u00f4ng c\u00f3 ch\u1ea5t \u1ee9c ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t, th\u1ec3 hi\u1ec7n c\u00e1c h\u1ea1t m\u1ecbn v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u m\u00e0 kh\u00f4ng c\u00f3 h\u1ea1t WC \u0111\u1eb7c bi\u1ec7t l\u1edbn. Nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft cho h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng n\u00e0y l\u00e0 1520\u00b0C, cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft th\u00f4ng th\u01b0\u1eddng \u0111\u1ed1i v\u1edbi h\u1ee3p kim WC-Co d\u01b0\u1edbi micron.<\/p>\n

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H\u00ecnh 4 cho th\u1ea5y c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re h\u1ea1t trung b\u00ecnh v\u1edbi 9 wt% Re + 6 wt% Co (b\u00ean tr\u00e1i) v\u00e0 h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re d\u01b0\u1edbi micron v\u1edbi 5,5 wt% Re + 3,7 wt% Co<\/figcaption><\/figure>\n
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H\u00ecnh 5 hi\u1ec3n th\u1ecb c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re d\u01b0\u1edbi micron v\u1edbi 5,5 wt% Re + 3,7 wt% Co.<\/figcaption><\/figure>\n

 <\/p>\n

Hi\u1ec7u su\u1ea5t c\u1ee7a WC-Co-Re si\u00eau cacbua<\/h1>\n

Nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re th\u1ec3 hi\u1ec7n c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 \u1edf nhi\u1ec7t \u0111\u1ed9 cao. C\u00e1c \u0111\u01b0\u1eddng cong trong H\u00ecnh 6 ch\u1ec9 ra r\u1eb1ng \u0111\u1ed9 c\u1ee9ng c\u1ee7a v\u1eadt li\u1ec7u WC-Co-Re v\u1eabn \u1ed5n \u0111\u1ecbnh h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m (20-800\u00b0C) so v\u1edbi h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co truy\u1ec1n th\u1ed1ng. Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng 300\u00b0C v\u00e0 500\u00b0C l\u00e0 ph\u1ed5 bi\u1ebfn \u0111\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n HPHT (\u00c1p su\u1ea5t cao nhi\u1ec7t \u0111\u1ed9 cao). So v\u1edbi v\u1eadt li\u1ec7u WC-Co th\u00f4ng th\u01b0\u1eddng, \u0111\u1ed9 c\u1ee9ng c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re gi\u1ea3m g\u1ea7n hai l\u1ea7n \u1edf hai nhi\u1ec7t \u0111\u1ed9 n\u00e0y. \u0110\u1ed9 c\u1ee9ng nhi\u1ec7t t\u0103ng l\u00ean r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho h\u1ee3p kim nhi\u1ec7t \u0111\u1ed9 cao g\u1ed1c niken ho\u1eb7c c\u00e1c v\u1eadt li\u1ec7u sinh nhi\u1ec7t kh\u00e1c. C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y y\u00eau c\u1ea7u c\u00e1c l\u01b0\u1ee1i c\u1eaft c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t cao v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc.<\/p>\n

\"\"<\/p>\n

H\u00ecnh 6. S\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 c\u1ee9ng theo nhi\u1ec7t \u0111\u1ed9 khi so s\u00e1nh cacbua xi m\u0103ng WC-Co-Re d\u01b0\u1edbi micron ch\u1ee9a 5,5 wt % Co + 3,7 wt % Re v\u1edbi cacbua xi m\u0103ng d\u01b0\u1edbi micron truy\u1ec1n th\u1ed1ng ch\u1ee9a 6 wt % Co<\/p>\n

H\u00ecnh 6 minh h\u1ecda s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 c\u1ee9ng theo nhi\u1ec7t \u0111\u1ed9 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re d\u01b0\u1edbi micron ch\u1ee9a 5,5 wt% Co + 3,7 wt% Re, so v\u1edbi h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng d\u01b0\u1edbi micron truy\u1ec1n th\u1ed1ng c\u00f3 6 wt% Co.<\/p>\n

D\u1ef1a tr\u00ean \u0111\u1ed9 c\u1ee9ng nhi\u1ec7t cao h\u01a1n \u0111\u00e3 \u0111\u1ec1 c\u1eadp tr\u01b0\u1edbc \u0111\u00f3 c\u1ee7a h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re, c\u00f3 th\u1ec3 suy ra r\u1eb1ng h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng ch\u1ee9a Re th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. Tr\u00ean th\u1ef1c t\u1ebf, nh\u01b0 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 trong H\u00ecnh 7, h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00f9ng gi\u00e1 tr\u1ecb t\u1ed1c \u0111\u1ed9 \u1ee9ng su\u1ea5t n\u00e9n d\u01b0\u1edbi t\u1ea3i tr\u1ecdng cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi v\u1eadt li\u1ec7u WC-Co th\u00f4ng th\u01b0\u1eddng. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y ch\u1ea5t k\u1ebft d\u00ednh Co-Re th\u1ec3 hi\u1ec7n hi\u1ec7u su\u1ea5t bi\u1ebfn d\u1ea1ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3.<\/p>\n

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H\u00ecnh 7 minh h\u1ecda m\u1ed1i quan h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng v\u00e0 \u1ee9ng su\u1ea5t n\u00e9n \u0111\u1ed1i v\u1edbi h\u1ee3p kim kim lo\u1ea1i c\u1ee9ng WC-Co-Re v\u00e0 WC-Co \u1edf nhi\u1ec7t \u0111\u1ed9 800\u00b0C.<\/p><\/div>\n

<\/p>","protected":false},"excerpt":{"rendered":"

Hyper carbide = hyper alloy + cemented carbide It is well known that there are two important performance indicators for hard metal alloys: hardness and strength. These two factors are often difficult to balance, much like a seesaw. However, the addition of rhenium to high-temperature alloys can significantly enhance the toughness and high-temperature deformation resistance…<\/p>","protected":false},"author":2,"featured_media":22182,"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-22174","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-weekly"],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2023\/08\/562c11dfa9ec8a131108bcbf99dcfd83a1ecc04f.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/22174","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=22174"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/22174\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/22182"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=22174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=22174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=22174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}