CN101381835A - Super high toughness shock resistance cemented carbides - Google Patents
Super high toughness shock resistance cemented carbides Download PDFInfo
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- CN101381835A CN101381835A CNA2008101433832A CN200810143383A CN101381835A CN 101381835 A CN101381835 A CN 101381835A CN A2008101433832 A CNA2008101433832 A CN A2008101433832A CN 200810143383 A CN200810143383 A CN 200810143383A CN 101381835 A CN101381835 A CN 101381835A
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Abstract
The invention discloses an extreme high toughness impact resisting hard alloy, the hard phase is WC and the binder phase is cobalt, and the alloy contains higher carbon content. The mass percentage compositions of the alloy are: 70 to 86 percent of WC and 14 to 30 percent of Co, wherein the mass percentage of the total carbon in the mixture of tungsten and cobalt is 4.3 to 5.4 percent. The extreme high toughness impact resisting hard alloy has good impact and fatigue resistance properties, is not easy to crack and has long service life. The hard alloy produced is mainly applied in the application environment with higher requirements on impact and fatigue properties.
Description
Technical field
The present invention relates to a kind of alloy, particularly relate to a kind of have high tough, tired flexible Wimet.
Background technology
At present, the cold-heading cold punching sintered-carbide die of production standard spare generally adopts coarse particles wolfram varbide hard phase, with addition of the bonding phase of high cobalt content, its tungsten carbide carbon content range of choice is generally: 6.03～6.13%, and its metallurgical structure non-compound carbon scope is: C00--C02.Standardized component mould shock-resistance, resistance to fatigue that this kind alloy is made are relatively poor, and alloy easily falls piece, cracking, and fragility is bigger, and work-ing life is shorter.Do not satisfy the needs of producing.The cold heading die alloy in use accounts for 40～50% because of above-mentioned reason cracking.
Summary of the invention
Technical problem to be solved by this invention provides a kind of its shock-resistance, resistance to fatigue is good, is difficult for falling fast, cracking, the high flexible impact resistant rigid alloy of long service life.
In order to solve the problems of the technologies described above, high flexible impact resistant rigid alloy provided by the invention, hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 70—86％
Co 14—30％
Wherein tungsten cobalt compound total carbon is 4.30～5.4%.
Adopt the high flexible impact resistant rigid alloy of technique scheme, a kind of rich carbon or the Wimet of micro-carburizing are provided, its cardinal principle be exactly in the Wimet cobalt binder mutually in along with the increase of carbon content, the amount of liquid phase that occurs during alloy sintering increases, and WC grain is grown up, and cobalt phase average free path increases, bonding phase factor solid solution W amount is few, plastic state is good, so its fracture toughness property improves, shock resistance fatigue also improves.But have uncombined carbon to separate out when serious, hardness is reduced, breaking tenacity descends.Wimet metallurgical structure non-compound carbon scope of the present invention is: C02--C06, its shock-resistance, resistance to fatigue are good, are difficult for falling fast, cracking, long service life.
In sum, the present invention is that a kind of its shock-resistance, resistance to fatigue are good, is difficult for falling fast, cracking, the high flexible impact resistant rigid alloy of long service life.The Wimet that the present invention produces is mainly used under the higher environment for use of impact and fatigability.
Embodiment
Six embodiment are provided below, and the invention will be further described.
Embodiment 1:
Hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 86％
Co 14％
Wherein tungsten cobalt compound total carbon is 5.29%,
Total carbon is 6.15% among the raw material WC.
Embodiment 2:
Hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 78％
Co 22％
Wherein tungsten cobalt compound total carbon is 4.8%,
Total carbon is 6.15% among the raw material WC
Embodiment 3:
Hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 70％
Co 30％
Wherein tungsten cobalt compound total carbon is 4.3%,
Total carbon is 6.15% among the raw material WC.
Embodiment 4:
Hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 86％
Co 14％
Wherein tungsten cobalt compound total carbon is 5.4%,
Total carbon is 6.28% among the raw material WC.
Embodiment 5:
Hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 78％
Co 22％
Wherein tungsten cobalt compound total carbon is 4.9%,
Total carbon is 6.28% among the raw material WC.
Embodiment 6:
Hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 70％
Co 30％
Wherein tungsten cobalt compound total carbon is 4.4%,
Total carbon is 6.28% among the raw material WC.
Can adopt the low-carbon (LC) total carbon is that 6.03～6.14% wolfram varbide is a wolfram varbide common on the market, also can be according to necessary requirement, it to the customized contained total carbon of raw material wolfram varbide manufacturer 6.15～6.28% wolfram varbide raw material, preferably use the back a kind of, not enough carbon amount is that 6.15～6.28% the scope of value is up and down carried out charge calculation according to the contained total carbon of WC, again by adding carbon black to required compound total carbon.Cobalt that the present invention carries (Co) content can not be lower than 14%, is lower than 14%, and bonding phase average thickness is too thin, and makes alloy shock resistance and fatigability variation; Cobalt (Co) content can not be higher than 30%, is higher than 30%, and alloy is too soft, the wear resistance variation.The present invention by above-mentioned per-cent proportioning, adopts common hard alloy powder metallurgical technology with each component, through wet-milling, mix glue (or mixing wax), suppress, come unstuck (or dewaxing), sintering the alloy finished product.
Claims (3)
1, a kind of high flexible impact resistant rigid alloy is characterized in that: hard is wolfram varbide mutually, and bonding is cobalt mutually, wherein contains higher mixed carbon comtent, and its mass percent is:
WC 70—86％
Co 14—30％
Wherein tungsten cobalt compound total carbon is 4.30～5.4%.
2, high flexible impact resistant rigid alloy according to claim 1, it is characterized in that: its prescription is:
WC 70—86％
Co 14—30％
Wherein, WC adopts superelevation carbon WC, and total carbon range is among this WC: 6.15-6.28%.
3, high flexible impact resistant rigid alloy according to claim 1, it is characterized in that: its prescription is:
WC 70—86％
Co 14—30％
The WC raw material adopts total carbon range to be: 6.03-6.14% conventional WC, then by charge calculation, adopt to add metallurgical carbon black, and make that total carbon range reaches among the WC: 6.15-6.28%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101433832A CN101381835A (en) | 2008-10-21 | 2008-10-21 | Super high toughness shock resistance cemented carbides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101433832A CN101381835A (en) | 2008-10-21 | 2008-10-21 | Super high toughness shock resistance cemented carbides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101381835A true CN101381835A (en) | 2009-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101433832A Pending CN101381835A (en) | 2008-10-21 | 2008-10-21 | Super high toughness shock resistance cemented carbides |
Country Status (1)
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| CN (1) | CN101381835A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728710A (en) * | 2012-07-06 | 2012-10-17 | 济南市冶金科学研究所 | Hard alloy plunger chip |
| CN104625076A (en) * | 2015-03-03 | 2015-05-20 | 株洲力洲硬质合金有限公司 | Production process of composite rolls |
| CN105296780A (en) * | 2015-11-05 | 2016-02-03 | 江苏和田科技材料有限公司 | Method for preparing nanometer tungsten carbide-cobalt hard alloy material |
-
2008
- 2008-10-21 CN CNA2008101433832A patent/CN101381835A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728710A (en) * | 2012-07-06 | 2012-10-17 | 济南市冶金科学研究所 | Hard alloy plunger chip |
| CN104625076A (en) * | 2015-03-03 | 2015-05-20 | 株洲力洲硬质合金有限公司 | Production process of composite rolls |
| CN105296780A (en) * | 2015-11-05 | 2016-02-03 | 江苏和田科技材料有限公司 | Method for preparing nanometer tungsten carbide-cobalt hard alloy material |
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Open date: 20090311 |