CN106987158B - A kind of spraying barrier coating for high-cobalt hart metal product sintering - Google Patents
A kind of spraying barrier coating for high-cobalt hart metal product sintering Download PDFInfo
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- CN106987158B CN106987158B CN201710316113.6A CN201710316113A CN106987158B CN 106987158 B CN106987158 B CN 106987158B CN 201710316113 A CN201710316113 A CN 201710316113A CN 106987158 B CN106987158 B CN 106987158B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
Abstract
The present invention relates to a kind of spraying barrier coating for high-cobalt hart metal product sintering, its constituent and mass percent are：High-purity C black 15%~30%；Zirconium oxide 39%~74.8%；N-butanol 0.2%~1.0%；Ionized water 10%~30%；Above components in certain proportion is mixed and centrifugal mixer is uniform under conventional centrifugal power, provided by the present invention for the spraying barrier coating of high-cobalt hart metal product sintering, the coating is sprayed on boat in a manner of brushing of spraying for obtained uniform suspension；The present invention uses high content zirconium oxide, and without using materials such as tween and polyethylene glycol, it still can keep that layer of surface is smooth, planar isolated layer in uniform thickness under the conditions of high temperature sintering, product can be effectively avoided to glue boat phenomenon, the viscous boat rate of production checking is less than 2%, and the coating constituent is few thus easily manufactured, dependable performance.
Description
Technical field
The present invention relates to a kind of spraying barrier coating for hart metal product sintering, suitable for cobalt content >=15%
The sintering of hart metal product.
Background technology
CEMENTED CARBIDE PRODUCTION flow is to be mixed with, and is pressed into base, and sintering obtains finished product.In vacuum and pressure sintering process
In, it is necessary to it will be positioned over into base on graphite boat.But if directly being contacted into base with boat, finished product and boat after sintering will be caused
One is sticked at, so as to cause alloy product and boat to scrap.Therefore a coating must be sprayed on boat to be used to isolate hard
Alloy blank and boat.
Cobalt content scope is less than 11% or the system higher than 11% from 5%~25% for cobalt content in hart metal product
Product need to use different boat coating.Cobalt content is low, and it sinters coating using carbon black as principal component, does not add metal oxidation
Thing；And cobalt content is high, then metal oxide must be added, otherwise phenomena such as viscous boat, carburizing deformation, metal oxidation occurs in coating
Thing content is low, can glue boat, and Gao Zehui is not easy scattered easily reunion, coating deposition often occurs, flakes, to avoid adding metal oxygen
Coating is not easy scattered the problem of easily reuniting after compound, and often Tween 80 and polyethylene glycol, Tween 80 and poly- second two are used in coating
Alcohol plays dispersed effect.
Existing coating main component is essentially carbon black, polyethylene glycol, AL2O3, formaldehyde, deionized water etc., such as Chinese invention
Apply " a kind of coating for CEMENTED CARBIDE PRODUCTION " (application number CN200410045077), the coating is sintering high cobalt (cobalt matter
Fraction is measured more than 15%) in terms of product, due to the presence of cobalt liquid phase, and the smaller angle of wetting between cobalt and graphite, hard
Alloy product can bond with graphite boat, cause carburizing, contraction distortion, cause viscous boat, lack deformation of products, pitted skin
Fall into.Reason is AL2O3In sintering process, hard alloy blank surface is easily immersed, so as to cause alloy surface pitted skin occur
Phenomenon, and cobalt content is too high, sintering process liquid phase is more, may pass through coating separation layer and causes product to glue boat, and then causes
Deformation of products, empirical tests for cobalt content 20% high-cobalt hart metal product, using AL2O3Coating its viscous boat rate be higher than
10%.Pitted skin can influence the size and precision of product, and exterior aesthetics, and viscous boat, deformation may then cause product rejection.
The content of the invention
It is an object of the invention to overcome the problems of existing spraying barrier coating, and one kind is provided and effectively avoids producing
Product glue the spraying barrier coating for being used for high-cobalt hart metal product sintering of boat phenomenon.
Technical scheme is used by realizing the object of the invention, it is a kind of for high-cobalt hart metal product sintering spraying every
From coating, its constituent and mass percent are：
As shown from the above technical solution, the spraying provided by the present invention for high-cobalt hart metal product sintering, which is isolated, applies
Material, it is the spraying barrier coating for the high-cobalt hart metal product for being exclusively used in cobalt content >=15%, it is auxiliary using the zirconium oxide of high content
With the adjustment of other components, above component is mixed and stirred in proportion, obtained uniform suspension is this hair
It is bright.For cobalt content >=15% high-cobalt hart metal product sinter when obvious cobalt liquid phase, spraying provided by the invention be present
Barrier coating uses the zirconium oxide of high content, zirconium oxide (ZrO2) it is that one kind disclosure satisfy that more than 1600 DEG C superhigh temperature oxidizing atmospheres
Lower long-term use of docrystalline oxide refractory fibrous material, due to ZrO2Material high-melting-point (2700 DEG C) in itself, do not aoxidize
With other high temperature good characteristics so that ZrO2Fiber uses temperature with higher than existing refractory fibre kind on domestic market
Degree and more preferable heat-proof quality, and high temeperature chemistry property is stable, corrosion-resistant, anti-oxidant, anti-thermal shock, non-volatile, pollution-free, is
A kind of undisputed most high-grade refractory fibrous material.
Cobalt content is higher in alloy, and the metal oxide content used in coating also accordingly increases, but metal oxide
Then coating is not easy scattered easily reunion to too high levels, coating deposition often occurs, flakes, the data that can be inquired about is shown, metal oxidation
Thing content is up to 25%, adds tween, polyethylene glycol etc. to eliminate agglomeration traits, in existing barrier coating and plays uniformly
The material of peptizaiton, but still suffer from viscous boat phenomenon.In barrier coating provided by the invention, zirconium oxide dosage is far above existing
Coating, and the material that tween, polyethylene glycol etc. play dispersed effect is not used, verification experimental verification is for cobalt content 20%
High-cobalt hart metal product, its viscous boat rate are less than 2%, and positive effect is better than existing coating, the reason is that existing coating due to
With the addition of the material that tween, polyethylene glycol etc. play dispersed effect, above-mentioned substance volatilizees in sintering process, to anti-boat sticking without
Any contribution function, the main reason in fact playing buffer action, preventing product Nian Jie with boat are exactly that metal oxide exists
Boat surface forms one layer of thin layer and serves buffer action, but the volatilization due to above-mentioned substance in sintering process, destroys
Coated coating structure before sintering so that coating layer thickness is uneven, adds the several of high-temperature liquid-phase breakdown coating separation layer on the contrary
Rate.The present invention still can keep layer of surface smooth, thick due to not tween 80 and polyethylene glycol in the case where temperature is higher
Uniform planar isolated layer is spent, the zirconium oxide of high content forms one layer of thin layer in boat surface and serves buffer action, so as to keep away
Free sticky boat phenomenon.And due to improving technique, traditional handicraft is that coating is brushed into boat using manual mode, it is necessary to uses and divides
Powder, modified technique are using spraying brushing mode, are verified through actual production, coating of the invention does not occur being not easy scattered ask
Topic.
Compared with prior art, provided by the present invention for the spraying barrier coating of high-cobalt hart metal product sintering, adopt
With high content zirconium oxide, and without using materials such as tween and polyethylene glycol, one layer still can be kept under the conditions of high temperature sintering
Surfacing, planar isolated layer in uniform thickness, product can be effectively avoided to glue boat phenomenon, for the high cobalt hard of cobalt content 20%
Alloy product, its viscous boat rate are less than 2%.The coating constituent is few thus easily manufactured, dependable performance.
Embodiment
The present invention is illustrated in detail with reference to specific embodiment, present disclosure is not limited to following reality
Apply example.
Embodiment 1：
A kind of spraying barrier coating for high-cobalt hart metal product sintering, its constituent and mass percent are：
High-purity C black 15.0%；Zirconium oxide 74.8%；N-butanol 0.2%；Ionized water 10.0%.
Above component is mixed in proportion and centrifugal mixer is uniform under conventional centrifugal power, obtained uniform suspension is i.e. originally
The spraying barrier coating for high-cobalt hart metal product sintering is invented, the coating is sprayed into boat in a manner of brushing of spraying
On, the viscous boat rate of production checking is 1.3%.
Embodiment 2：
A kind of spraying barrier coating for high-cobalt hart metal product sintering, its constituent and mass percent are：
High-purity C black 20.0%；Zirconium oxide 69.8%；N-butanol 0.2%；Ionized water 10.0%.
Above component is mixed in proportion and centrifugal mixer is uniform under conventional centrifugal power, obtained uniform suspension is i.e. originally
The spraying barrier coating for high-cobalt hart metal product sintering is invented, the coating is sprayed into boat in a manner of brushing of spraying
On, the viscous boat rate of production checking is 1.5%.
Embodiment 3：
A kind of spraying barrier coating for high-cobalt hart metal product sintering, its constituent and mass percent are：
High-purity C black 20.0%；Zirconium oxide 64.8%；N-butanol 0.2%；Ionized water 15.0%.
Above component is mixed in proportion and centrifugal mixer is uniform under conventional centrifugal power, obtained uniform suspension is i.e. originally
The spraying barrier coating for high-cobalt hart metal product sintering is invented, the coating is sprayed into boat in a manner of brushing of spraying
On, the viscous boat rate of production checking is 1.8%.
Embodiment 4：
A kind of spraying barrier coating for high-cobalt hart metal product sintering, its constituent and mass percent are：
High-purity C black 22.0%；Zirconium oxide 60.0%；N-butanol 0.2%；Ionized water 17.8%.
Above component is mixed in proportion and centrifugal mixer is uniform under conventional centrifugal power, obtained uniform suspension is i.e. originally
The spraying barrier coating for high-cobalt hart metal product sintering is invented, the coating is sprayed into boat in a manner of brushing of spraying
On, the viscous boat rate of production checking is 1.9%.
Claims (1)
1. a kind of spraying barrier coating for high-cobalt hart metal product sintering, it is characterised in that its constituent and quality
Percentage is：
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710316113.6A CN106987158B (en) | 2017-05-08 | 2017-05-08 | A kind of spraying barrier coating for high-cobalt hart metal product sintering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710316113.6A CN106987158B (en) | 2017-05-08 | 2017-05-08 | A kind of spraying barrier coating for high-cobalt hart metal product sintering |
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| CN106987158A CN106987158A (en) | 2017-07-28 |
| CN106987158B true CN106987158B (en) | 2018-04-10 |
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| CN109535781A (en) * | 2018-10-29 | 2019-03-29 | 株洲市超宇实业有限责任公司 | A kind of anti-sticking universal lacquer of senior middle school's hard alloy in low cobalt sintering |
| CN109722069B (en) * | 2018-12-25 | 2021-03-05 | 苏州新锐合金工具股份有限公司 | Environment-friendly high-adhesion hard alloy anti-sticking coating and preparation method and application thereof |
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| US7632323B2 (en) * | 2005-12-29 | 2009-12-15 | Schlumberger Technology Corporation | Reducing abrasive wear in abrasion resistant coatings |
| CN101386055B (en) * | 2008-10-21 | 2010-08-11 | 株洲力洲硬质合金有限公司 | Coating for sintering the high-cobalt hard metal product |
| 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 |
| CN102367333A (en) * | 2011-09-01 | 2012-03-07 | 四川科力特硬质合金股份有限公司 | Anti-sticking paint for cemented carbide vacuum sintering |
| 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 |
| CN102744404B (en) * | 2012-07-26 | 2013-10-23 | 江西稀有稀土金属钨业集团有限公司 | Surface bonding-proof method for hard alloy parison sintering boat |
| CN106566321A (en) * | 2016-10-31 | 2017-04-19 | 浙江德威硬质合金制造有限公司 | Multifunctional coating for high-temperature sintering of hard alloy and metal ceramic |
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