CN101386055B - Coating for sintering the high-cobalt hard metal product - Google Patents
Coating for sintering the high-cobalt hard metal product Download PDFInfo
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- CN101386055B CN101386055B CN2008101433851A CN200810143385A CN101386055B CN 101386055 B CN101386055 B CN 101386055B CN 2008101433851 A CN2008101433851 A CN 2008101433851A CN 200810143385 A CN200810143385 A CN 200810143385A CN 101386055 B CN101386055 B CN 101386055B
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- sintering
- coating
- boat
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- metal product
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Abstract
The invention discloses a paint for sintering a high-cobalt hard alloy product. The paint is made from the following components by weight percentage: 25-40% of high-purity carbon black, 6-12% of high-purity white titanium pigment TiO2, 1-4% of polyethylene glycol, 0.2-1.0% of glycerol, 0.2-1.0% of n-butanol and 40-67% of ionized water. The paint is used for sintering the high-cobalt hard alloy product, effectively avoids pitted surface and boat adhesion, and has the advantages of convenient manufacture and reliable performances.
Description
Technical field
The present invention relates to a kind of coating that is used for high-cobalt hart metal product in vacuum and pressure sintering atmosphere.
Background technology
The CEMENTED CARBIDE PRODUCTION basic procedure is earlier with powder, is pressed into blank again, carries out sintering then and obtains finished product.In vacuum and pressure sintering process, blank must be positioned over above the graphite boat.If but blank directly contacts with boat, will cause that finished product and boat stick at one behind the sintering, thereby cause scrapping of alloy product and boat.Therefore must brush a coating on boat is used to isolate carbide alloy blank and boat.Existing coating is suitable for basically for the hard alloy in low cobalt product.But still there is the defective of gluing boat, making product distortion, pitted skin in existing coating aspect the high cobalt of sintering (the cobalt mass fraction is more than 15%) product.Because existing coating main component is carbon black, polyethylene glycol, AL substantially
2O
3, formaldehyde, deionized water etc., and AL
2O
3In sintering process, very easily immerse carbide alloy blank surface, thereby cause alloy surface the pitted skin phenomenon to occur, and cobalt content to be too high, the sintering process liquid phase is more, may pass the coating separation layer and causes product to glue boat, and then cause the product distortion.Pitted skin can influence the size and the precision of product, and the appearance looks elegant degree.Sticking boat, distortion then may cause product rejection.
Summary of the invention
Technical problem to be solved by this invention provides a kind of coating that is used for the high-cobalt hart metal product sintering of effectively avoiding product pitted skin and sticking boat phenomenon.
In order to solve the problems of the technologies described above, the coating that is used for the high-cobalt hart metal product sintering provided by the invention, its constituent and mass percent are:
High-purity carbon black 25-40%,
High purity titanium white powder TiO
26-12%,
Polyethylene glycol 1-4%,
Glycerine 0.2-2.0%,
N-butanol 0.2-2.0%,
Ionized water 40-67%.
Adopt the coating that is used for the high-cobalt hart metal product sintering of technique scheme, replace AL by adopting the high purity titanium white powder
2O
3, and the adjustment by other composition and ratio mixes above components in certain proportion and stirs, and the even suspension that obtains promptly obtains the present invention, and this coating is owing to cancelled AL
2O
3, effectively avoided product pitted skin and sticking boat phenomenon, because AL
2O
3In sintering process, very easily immerse carbide alloy blank surface, thereby cause alloy surface pitted skin to occur, and adopt TiO2, because TiO2 and other paint ingredient still can keep one deck planar isolated film under the temperature condition with higher, so avoided the pitted skin phenomenon.Adopt this prescription gained coating, owing to avoided high-temperature liquid-phase to puncture dope layer, thus avoided sticking boat phenomenon, and then avoided because the product distortion that sticking boat causes.
In sum, the present invention is a kind of product pitted skin and sticking boat phenomenon and coating that is used for the high-cobalt hart metal product sintering easily manufactured, dependable performance effectively avoided.
The specific embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
High-purity carbon black 25%,
High purity titanium white powder TiO
26%,
Polyethylene glycol 1%,
Glycerine 0.2%,
N-butanol 0.8%,
Ionized water 67%.
Above components in certain proportion is mixed and stir, the even suspension that obtains promptly obtains the present invention.
Embodiment 2:
High-purity carbon black 33%,
High purity titanium white powder TiO
29%,
Polyethylene glycol 2%,
Glycerine 1%,
N-butanol 1%,
Ionized water 54%.
Above components in certain proportion is mixed and stir, the even suspension that obtains promptly obtains the present invention.
Embodiment 3:
High-purity carbon black 40%,
High purity titanium white powder TiO
212%,
Polyethylene glycol 2%,
Glycerine 1%,
N-butanol 1%,
Ionized water 44%.
Above components in certain proportion is mixed and stir, the even suspension that obtains promptly obtains the present invention.
Embodiment 4:
High-purity carbon black 40%,
High purity titanium white powder TiO
212%,
Polyethylene glycol 4%,
Glycerine 2%,
N-butanol 2%,
Ionized water 40%.
Above components in certain proportion is mixed and stir, the even suspension that obtains promptly obtains the present invention.
Embodiment 5:
High-purity carbon black 30%,
High purity titanium white powder TiO
212%,
Polyethylene glycol 3%,
Glycerine 0.8%,
N-butanol 0.2%,
Ionized water 54%.
Above components in certain proportion is mixed and stir, the even suspension that obtains promptly obtains the present invention.
Claims (1)
1. coating that is used for the high-cobalt hart metal product sintering, it is characterized in that: its constituent and mass percent are:
High-purity carbon black 25-40%,
High purity titanium white powder TiO
26-12%,
Polyethylene glycol 1-4%,
Glycerine 0.2-2.0%,
N-butanol 0.2-2.0%,
Ionized water 40-67%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101433851A CN101386055B (en) | 2008-10-21 | 2008-10-21 | Coating for sintering the high-cobalt hard metal product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101433851A CN101386055B (en) | 2008-10-21 | 2008-10-21 | Coating for sintering the high-cobalt hard metal product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101386055A CN101386055A (en) | 2009-03-18 |
| CN101386055B true CN101386055B (en) | 2010-08-11 |
Family
ID=40475838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101433851A Expired - Fee Related CN101386055B (en) | 2008-10-21 | 2008-10-21 | Coating for sintering the high-cobalt hard metal product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101386055B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928478B (en) * | 2009-06-18 | 2013-03-13 | 自贡硬质合金有限责任公司 | Coating for high bonding phase cemented carbide sintering |
| CN101972848B (en) * | 2010-11-17 | 2012-05-16 | 河源富马硬质合金股份有限公司 | Special coating for vacuum sintering of high-cobalt hard alloy and preparation and use methods thereof |
| CN101972849A (en) * | 2010-11-17 | 2011-02-16 | 河源富马硬质合金股份有限公司 | Anti-boat sticking coating and preparation and use methods thereof |
| CN102554223B (en) * | 2011-11-28 | 2013-08-14 | 株洲硬质合金集团有限公司 | Coating for sintering hard alloy product |
| CN104559709B (en) * | 2014-12-31 | 2017-05-10 | 温丽娥 | Special coating for producing tungsten-cobalt alloys |
| CN104761933A (en) * | 2015-03-13 | 2015-07-08 | 昆山长鹰硬质合金有限公司 | Coat and spraying process |
| CN105238240A (en) * | 2015-11-13 | 2016-01-13 | 浙江中质合金材料有限公司 | Antisticking coating for high-temperature sintering of hard alloy and preparation method of antisticking coating |
| CN106987158B (en) * | 2017-05-08 | 2018-04-10 | 株洲力洲硬质合金有限公司 | A kind of spraying barrier coating for high-cobalt hart metal product sintering |
| CN108677136A (en) * | 2018-05-28 | 2018-10-19 | 株洲硬质合金集团有限公司 | A method of eliminating hard alloy decarburization defect |
-
2008
- 2008-10-21 CN CN2008101433851A patent/CN101386055B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101386055A (en) | 2009-03-18 |
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| PB01 | Publication | ||
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Granted publication date: 20100811 Termination date: 20121021 |