CN104388721B - The alloy product sintering process that high cobalt is bonding - Google Patents
The alloy product sintering process that high cobalt is bonding Download PDFInfo
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- CN104388721B CN104388721B CN201410606899.1A CN201410606899A CN104388721B CN 104388721 B CN104388721 B CN 104388721B CN 201410606899 A CN201410606899 A CN 201410606899A CN 104388721 B CN104388721 B CN 104388721B
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Abstract
The invention discloses the alloy product sintering process that high cobalt is bonding, comprise the following steps successively: pressure 500Pa, within 2 hours, temperature average rate rises to about 700 DEG C, it is incubated 1 hour, in 3 hours, temperature is risen to about 1200 DEG C again, then be incubated 2 hours, then in 2 hours, cool to about 700 DEG C, it is warming up to about 1200 DEG C again in 2 hours, by boost in pressure to 800Pa, it is incubated 1 hour, then temperature is risen to 1400 DEG C by 2 hours, adherence pressure is incubated 2 hours to 6MPa, then is down to normal temperature and pressure in 11 hours.The invention have the advantage that before heating to maximum temperature, carry out the step of a cooling so that have the time of sizing at the product fired, so product would not cave in sintering process, improves the yield rate of sintering.
Description
Technical field
The present invention relates to the alloy product sintering process that high cobalt is bonding.
Background technology
High cobalt bonding alloy product occupies very big component in hart metal product, the so-called bonding hart metal product of high cobalt refers to that wherein cobalt content is 20～30%, when firing this series products larger-size, common burning process be heat-be incubated-heat-be incubated-heat-be incubated-be warmed to 1400 the highest degrees centigrade, then in cooling-insulation-cooling, this method can make the large scale bonding hard alloy of height cobalt lose in sintering process sizing generation cave in, cause percent defective to raise.
Summary of the invention
It is an object of the invention to provide the alloy product sintering process that high cobalt is bonding, it is possible to the existing large scale bonding hard alloy of height cobalt of effective solution loses sizing generation in sintering process and caves in, and causes the problem that percent defective raises.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions: the alloy product sintering process that high cobalt is bonding, comprises the following steps successively:
A., product to be sintered is put into sintering furnace, pressure 500Pa, and sintering time 2 hours, sintering temperature average rate rises to 680-720 DEG C；
B. keep the pressure and temperature in step A constant, be incubated 1 hour；
C. keeping the pressure in step A constant, sintering time 3 hours, sintering temperature average rate rises to 1180-1220 DEG C；
D. under the pressure and temperature of step C, it is incubated 2 hours；
E. keep the pressure inconvenience of step D, time 2 h, temperature average rate is down to 680-720 DEG C；
F. the pressure keeping step E is constant, and temperature average rate is risen to 1180-1220 DEG C by time 2 h；
G. adherence pressure is to 800Pa, is incubated 1 hour；
H. keep the pressure of step G, time 2 h, temperature is at the uniform velocity promoted to 1380-1420 DEG C；
I. adherence pressure is to 6MPa, is incubated 2 hours；
J. time 11 hours, temperature is down to room temperature, and pressure is down to normal pressure.
Preferably, in step J, pressure is down to normal pressure 9 hours average rates；In advance pressure is dropped to normal pressure so that will not ftracture during the product cooling fired.
Preferably, in step J, in 4 hours, temperature average rate is down to 900 DEG C, is then down to 400 DEG C after 3 hours temperature average rates, is then down to room temperature after 4 hours temperature；Ensure that the product fired can cool down uniformly, will not because of cooling time internal-external temperature difference excessive and ftracture.
Compared with prior art, the invention have the advantage that before heating to maximum temperature, carry out the step of a cooling so that have the time of sizing at the product fired, so product would not cave in sintering process, improves the yield rate of sintering.
Accompanying drawing explanation
Fig. 1 is the time-temperature curve figure of the bonding alloy product sintering process of height cobalt of the present invention；
Fig. 2 is the time m-pressue-graph of the bonding alloy product sintering process of height cobalt of the present invention.
Detailed description of the invention
Consult the embodiment that Fig. 1, Fig. 2 are the bonding alloy product sintering process of height cobalt of the present invention, the alloy product sintering process that high cobalt is bonding, comprise the following steps successively:
A., product to be sintered is put into sintering furnace, pressure 500Pa, and sintering time 2 hours, sintering temperature average rate rises to 680-720 DEG C；
B. keep the pressure and temperature in step A constant, be incubated 1 hour；
C. keeping the pressure in step A constant, sintering time 3 hours, sintering temperature average rate rises to 1180-1220 DEG C；
D. under the pressure and temperature of step C, it is incubated 2 hours；
E. keep the pressure inconvenience of step D, time 2 h, temperature average rate is down to 680-720 DEG C；
F. the pressure keeping step E is constant, and temperature average rate is risen to 1180-1220 DEG C by time 2 h；
G. adherence pressure is to 800Pa, is incubated 1 hour；
H. keep the pressure of step G, time 2 h, temperature is at the uniform velocity promoted to 1380-1420 DEG C；
I. adherence pressure is to 6MPa, is incubated 2 hours；
J. pressure is down to normal pressure 9 hours average rates, and in 4 hours, temperature average rate is down to 900 DEG C, is then down to 400 DEG C after 3 hours temperature average rates, is then down to room temperature after 4 hours temperature.
Before heating to maximum temperature, carry out the step of a cooling so that have the time of sizing at the product fired, so product would not cave in sintering process, improves the yield rate of sintering.
The foregoing is only specific embodiments of the invention, but the technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and change or the modification made all are encompassed among the scope of the claims of the present invention.
Claims (3)
1. the alloy product sintering process that high cobalt is bonding, it is characterised in that: comprise the following steps successively:
A., product to be sintered is put into sintering furnace, pressure 500Pa, and sintering time 2 hours, sintering temperature average rate rises to 680-720 DEG C；
B. keep the pressure and temperature in step A constant, be incubated 1 hour；
C. keeping the pressure in step A constant, sintering time 3 hours, sintering temperature average rate rises to 1180-1220 DEG C；
D. under the pressure and temperature of step C, it is incubated 2 hours；
E. the pressure keeping step D is constant, and temperature average rate is down to 680-720 DEG C by time 2 h；
F. the pressure keeping step E is constant, and temperature average rate is risen to 1180-1220 DEG C by time 2 h；
G. adherence pressure is to 800Pa, is incubated 1 hour；
H. keep the pressure of step G, time 2 h, temperature is at the uniform velocity promoted to 1380-1420 DEG C；
I. adherence pressure is to 6MPa, is incubated 2 hours；
J., in 11 hours time, temperature is down to room temperature, and pressure is down to normal pressure.
2. the alloy product sintering process that high cobalt as claimed in claim 1 is bonding, it is characterised in that: in step J, pressure is down to normal pressure 9 hours average rates.
3. the alloy product sintering process that high cobalt as claimed in claim 1 is bonding, it is characterised in that: in step J, in 4 hours, temperature average rate is down to 900 DEG C, is then down to 400 DEG C after 3 hours temperature average rates, is then down to room temperature after 4 hours temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410606899.1A CN104388721B (en) | 2014-10-31 | 2014-10-31 | The alloy product sintering process that high cobalt is bonding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410606899.1A CN104388721B (en) | 2014-10-31 | 2014-10-31 | The alloy product sintering process that high cobalt is bonding |
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| Publication Number | Publication Date |
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| CN104388721A CN104388721A (en) | 2015-03-04 |
| CN104388721B true CN104388721B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6797369B2 (en) * | 2001-09-26 | 2004-09-28 | Kyocera Corporation | Cemented carbide and cutting tool |
| JP5375707B2 (en) * | 2010-03-28 | 2013-12-25 | 三菱マテリアル株式会社 | Sputtering target for forming a magnetic recording film and method for producing the same |
| CN102634685A (en) * | 2011-02-10 | 2012-08-15 | 厦门金鹭特种合金有限公司 | Ultra-coarse grain cemented carbide secondary liquid-phase sintering process |
| CN103695835B (en) * | 2013-12-10 | 2015-12-09 | 浙江恒成硬质合金有限公司 | A kind of Hard alloy filler repair technology |
| CN103643100B (en) * | 2013-12-11 | 2016-02-03 | 中国神华能源股份有限公司 | A kind of Nanograin Cemented Carbide and preparation method thereof |
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Denomination of invention: Sintering process of high cobalt bonded alloy products Effective date of registration: 20230630 Granted publication date: 20160706 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG HENGCHENG CEMENTED CARBIDE Co.,Ltd. Registration number: Y2023330001295 |
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