CN102585569A - Coating for sintering hard alloy, preparation method and using method - Google Patents
Coating for sintering hard alloy, preparation method and using method Download PDFInfo
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- CN102585569A CN102585569A CN2011104375332A CN201110437533A CN102585569A CN 102585569 A CN102585569 A CN 102585569A CN 2011104375332 A CN2011104375332 A CN 2011104375332A CN 201110437533 A CN201110437533 A CN 201110437533A CN 102585569 A CN102585569 A CN 102585569A
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Abstract
The invention provides a coating for hard alloy. The coating comprises the composing components with weight percentages as follows: 30 to 50 percent of alumina powder, 4 to 10 percent of polyethylene glycol, 40 to 70 percent of alcohol and 6 to 12 percent of deionized water. The coating provided by the invention has the advantages of simple composing component, high maneuverability and steady quality, is easy to homogenize when being brushed on a boat, is simple and easy to dry, and can solve the problems of bending, deformation, carburization, and the like which are caused by boat adhesion of hard alloy products.
Description
Technical field
The present invention relates to a kind of coating, compound method and method of use that is used for sintering cemented carbide.
Technical background
In the CEMENTED CARBIDE PRODUCTION process, the main task of sintering circuit is to make alloy obtain best weave construction, and the magneticsaturation value is requiring the position relatively; The grain fineness number appropriateness, evenly; Cobalt is evenly distributed mutually; Porosity is little, prevents product distortion, bending and peeling etc.
In the agglomerating process, because product directly contacts with graphite boat, the carbon in the graphite boat at high temperature can progressively be diffused into the alloy product middle part by the alloy product contact surface; Thereby cause problems such as alloy product bending, distortion, carburizing, its mechanism is, when high temperature sintering; When the carbon on the boat began from alloy surface toward internal diffusion, it is higher that local carbon concentration can appear in alloy product, and the sintering liquid phase can appear in its concentration higher position in advance; Thereby cause the alloy product sintering to shrink fine and close non-homogeneousization; Cause crooked, the distortion of product, when sintering finishes, if local carbon concentration still is higher than the required carbon content of alloy two phase structures; Local carburization will occur, the whole carburizing of alloy product will appear in the most serious result.So superior in quality, stable coating is the key of dealing with problems.
Existing coating commonly used is that main ingredient is made with Graphite Powder 99, metallurgical carbon black, MOX, water, formaldehyde etc. mainly.
Patent documentation CN1597885 discloses a kind of coating that is used for CEMENTED CARBIDE PRODUCTION; It is to adopt 7 kinds of components, and proportioning is following: Graphite Powder 99 20～40%, tween 4～8%, Z 150PH 0.2～1.0%, formaldehyde 0.05～0.5%, aluminum oxide powder 1～5%, water-soluble glue 0.1～1.0%, zero(ppm) water 50～70%; This coating composition has strong adhesion; Be easy to during brushing be uniformly dispersed; To characteristics such as the non-stick property of hard metal article is good, and blending process is simple in the vacuum sintering process, and cost is low; Use it can improve the hart metal product quality of stability, help the large-scale industrial production of wimet.Yet its composition is too much, operates more loaded down with trivial detailsly, and production cost is higher.
Patent documentation 101386055B discloses a kind of high-cobalt hart metal product agglomerating coating that is used for; Its moity has 6 kinds, and mass percent is: high-purity carbon black 25-40%, high purity titanium white powder TiO26-12%; Polyoxyethylene glycol 1-4%; Glycerine 0.2-1.0%, propyl carbinol 0.2-1.0%, ionized water 40-67%.This coating be a kind of effectively avoid product pitted skin and sticking boat phenomenon, dependable performance be used for high-cobalt hart metal product agglomerating coating.Yet its composition is too much, operates more loaded down with trivial detailsly, and production cost is higher.
Patent documentation CN101104773A discloses a kind of hard alloy vacuum anti-sticking coating, and its main ingredient has high-purity carbon black, anion water, tween etc.
Patent documentation CN1482193A discloses a kind of coating that is used for CEMENTED CARBIDE PRODUCTION, and its main ingredient has that high-purity metallurgical carbon black, graphite scale gather, anion water etc.
Patent documentation CN101928478A discloses a kind of coating for high bonding phase cemented carbide sintering, and its main ingredient has oxide compound, carbon black, zero(ppm) water etc.
Patent documentation CN1005097B discloses the antiseized carbon element gluing of a kind of hard alloy vacuum sintering, and its main ingredient has high-purity carbon materials, hexamethylenetetramine, tensio-active agent, water purification etc.
The above-mentioned prior art patent document that belongs to is a main ingredient with carbon black or Graphite Powder 99, water all, and the partial monopoly document also is added with formaldehyde, tween equals human body harmful's composition, though all obtained effect preferably separately; But,, in coating, add Graphite Powder 99 or carbon black because hard metal article sintering boat is graphite boat; Make painting color and boat become in full accord; Like this, when brushing boat, exist brush boat quality just to be difficult to guarantee to coating, thereby; When sintering, the qualification rate of hard metal article can descend to some extent.Simultaneously, the weight percent of water all accounts for higher proportion in the above-mentioned patent documentation, like this, is unlikely to have influence on the sintering atmosphere of alloy in order to guarantee the moisture in the coating, must have higher requirement to the drying of boat.This not only makes complicated operationization, and cost has also improved.
Summary of the invention
The purpose of this invention is to provide a kind of coating, compound method and method of use that is used for sintering cemented carbide; Its system component is simple, workable, steady quality, brush boat easy and uniform, dry simple, can prevent because of bending that the sticking boat of hart metal product causes, distortion, carburizing etc.
For this reason, according to a first aspect of the invention, a kind of coating that is used for sintering cemented carbide is provided, it adopts following composition and weight proportion: aluminum oxide powder 30～50%; Polyoxyethylene glycol 4～10%; Alcohol 40～70%; With deionized water 6～12%.
Preferably, the weight percent of each moity is: aluminum oxide powder: 36～50%; Polyoxyethylene glycol: 6～10%; Alcohol: 45～70%; And deionized water: 7～12%.
Preferably, the weight percent of each moity is: aluminum oxide powder: 40～50%; Polyoxyethylene glycol: 6～10%; Alcohol: 50～70%; And deionized water: 8～12%.
Preferably, the weight percent of each moity is: aluminum oxide powder: 45～50%; Polyoxyethylene glycol: 8～10%; Alcohol: 55～70%; And deionized water: 9～12%.
Preferably, the weight percent of each moity is: aluminum oxide powder: 48～50%; Polyoxyethylene glycol: 9～10%; Alcohol: 60～70%; And deionized water: 10～12%.
Preferably, the weight percent of each moity is: aluminum oxide powder: 30～45%; Polyoxyethylene glycol: 4～9%; Alcohol: 40～65%; And deionized water: 6～11%.
Preferably, 30～40% of each moity; Polyoxyethylene glycol: 4～8%; Alcohol: 40～60%; And deionized water: 6～10%.
Preferably, 35～45% of each moity; Polyoxyethylene glycol: 6～8%; Alcohol: 50～60%; And deionized water: 8～10%.
According to a second aspect of the invention; A kind of compound method of coating of sintering cemented carbide is provided; It is characterized in that, alumina powder, polyoxyethylene glycol, alcohol, deionized water by the proportioning preparation, were at the uniform velocity stirred in the beaker of packing into 10-15 minute; Can obtain uniform suspension liquid body, weight percent is: aluminum oxide powder 30～50%; Polyoxyethylene glycol 4～10%; Alcohol 40～70%; And deionized water 6～12%.
According to a third aspect of the invention we; A kind of method of use of coating of sintering cemented carbide is provided; It is characterized in that, alumina powder, polyoxyethylene glycol, alcohol, deionized water by the proportioning preparation, were at the uniform velocity stirred in the beaker of packing into 10-15 minute; Can obtain uniform suspension liquid body, weight percent is: aluminum oxide powder 30～50%; Polyoxyethylene glycol 4～10%; Alcohol 40～70%; And deionized water 6～12%; Adopt hairbrush that turbid liquid is evenly brushed on graphite boat, the about 0.5～2.0mm of coat-thickness, seasoning was used after 4～5 hours.
The composition of such scheme is compared with conventional coating composition, and composition is simpler, and operability is stronger.
The present invention has only 4 kinds of compositions.Raw material obtains easily, and cost is also lower.The preparation of coating is simpler, and production cost reduces significantly.
Description of drawings
Fig. 1 is the coating preparation and method of use synoptic diagram according to sintering cemented carbide of the present invention.
Embodiment
Aluminum oxide powder is a main body of making coating, can on boat, form layer of even aluminum oxide bisque in the time of agglomerating, does not ftracture, peels off.
Polyoxyethylene glycol (PEG6000) is as auxiliary component, and it is insoluble to alcohol, and water soluble can improve the liquid viscosity of suspension liquid, the homogeneity of coat-thickness when guaranteeing the coating brushing.
Alcohol and deionized water mainly are the effects of its dissolving polyoxyethylene glycol, and after the coating suspension liquid is painted on boat, but alcohol and deionized water rapid and natural are dry.
Aluminum oxide powder 30 weight %, polyoxyethylene glycol 10 weight %, alcohol 48 weight %, deionized water 12 weight % stir above component and get final product.
Aluminum oxide powder 35 weight %, polyoxyethylene glycol 8 weight %, alcohol 47 weight %, deionized water 10 weight % stir above component and get final product.
Aluminum oxide powder 44 weight %, polyoxyethylene glycol 4 weight %, alcohol 46 weight %, deionized water 6 weight % stir above component and get final product.
The present invention can also have other many specific embodiments, and the composition of each embodiment comprises: aluminum oxide powder, polyoxyethylene glycol, alcohol and deionized water.
The content of aluminum oxide powder, polyoxyethylene glycol, alcohol and deionized water composition is separate each other, and composition is: aluminum oxide powder 30～50 weight %, polyoxyethylene glycol 4～10 weight %, alcohol 40～70 weight %, deionized water 6～12 weight %.
Specifically, the content of aluminum oxide powder can be 30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50 weight %;
Specifically, the content of polyoxyethylene glycol can be 4,5,6,7,8,9,10 weight %;
Specifically, the content of alcohol can be 40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70 weight %; And
Specifically, the content of deionized water can be 6,7,8,9,10,11,12 weight %.
Comparative example
This comparative example is a kind of existing wimet examples of paints commonly used of illustration.Composition comprises: Graphite Powder 99 30 weight %; Tween 6 weight %; Z 150PH 0.6 weight %; Formaldehyde 0.3 weight %; Aluminum oxide powder 3 weight %; Water-soluble glue 0.6 weight %; Zero(ppm) water 59.5 weight %.
Raw material is ready on request, Z 150PH is used the zero(ppm) water heating for dissolving in advance, process the aqueous solution of 5 weight %.By the weight of strict each component of weighing of proportioning, each component is stirred under the dry type state earlier, add zero(ppm) water then and adopted mechanical stirring 4 hours.
Test Example
As shown in Figure 1, various raw materials are prepared in proportion, then; Pour in the stirred vessel 1 (for example beaker), stir, form the suspension liquid body; Use hairbrush, the coating 3 that embodiment 1, embodiment 2, embodiment 3, comparative example are processed is brushed on the surface of graphite boat 2 coat-thickness 0.5-2mm respectively; Seasoning 5 hours; After checking respectively then, the alloy bar material product of putting
carries out sintering, and test-results is seen table 1:
Table 1 unit: %
| |
|
|
Comparative example | |
| Brush boat qualification rate | 100 | 100 | 100 | 95 |
| The product rate of curving | 3 | 0 | 2 | 12 |
| The product deformation rate | 0 | 0 | 0 | 1.0 |
| Product carburizing rate | 0 | 0 | 0 | 1.5 |
Above-mentioned experimental result shows that component of the present invention is simple, and is workable, and brush boat good uniformity has good effect to preventing product bending, distortion, carburizing that sticking boat causes.
Claims (10)
1. a novel hard alloy agglomerating coating is characterized in that its component and weight percent can be: aluminum oxide powder: 30～50%; Polyoxyethylene glycol: 4～10%; Alcohol: 40～70%; And deionized water: 6～12%.
2. the coating of sintering cemented carbide as claimed in claim 1 is characterized in that, weight percent is: aluminum oxide powder: 36～50%; Polyoxyethylene glycol: 6～10%; Alcohol: 45～70%; And deionized water: 7～12%.
3. according to claim 1 or claim 2 the coating of sintering cemented carbide is characterized in that weight percent is: aluminum oxide powder: 40～50%; Polyoxyethylene glycol: 6～10%; Alcohol: 50～70%; And deionized water: 8～12%.
4. like the coating of one of them described sintering cemented carbide of claim, it is characterized in that weight percent is: aluminum oxide powder: 45～50%; Polyoxyethylene glycol: 8～10%; Alcohol: 55～70%; And deionized water: 9～12%.
5. like the coating of one of them described sintering cemented carbide of claim, it is characterized in that weight percent is: aluminum oxide powder: 48～50%; Polyoxyethylene glycol: 9～10%; Alcohol: 60～70%; And deionized water: 10～12%.
6. like the coating of one of them described sintering cemented carbide of claim, it is characterized in that weight percent is: aluminum oxide powder: 30～45%; Polyoxyethylene glycol: 4～9%; Alcohol: 40～65%; And deionized water: 6～11%.
7. like the coating of one of them described sintering cemented carbide of claim, it is characterized in that weight percent is: aluminum oxide powder: 30～40%; Polyoxyethylene glycol: 4～8%; Alcohol: 40～60%; And deionized water: 6～10%.
8. like the coating of one of them described sintering cemented carbide of claim, it is characterized in that weight percent is: aluminum oxide powder: 35～45%; Polyoxyethylene glycol: 6～8%; Alcohol: 50～60%; And deionized water: 8～10%.
9. compound method like the coating of one of them described sintering cemented carbide of claim 1-8; It is characterized in that; Alumina powder, polyoxyethylene glycol, alcohol, deionized water by the proportioning preparation, were at the uniform velocity stirred in the beaker of packing into 10-15 minute, obtain uniform suspension liquid body.
10. the method for use like the coating of one of them described sintering cemented carbide of claim 1-8 is characterized in that,
Alumina powder, polyoxyethylene glycol, alcohol, deionized water by the proportioning preparation, were at the uniform velocity stirred in the beaker of packing into 10-15 minute, obtain uniform suspension liquid body;
The suspension liquid body is evenly brushed on graphite boat, coat-thickness 0.5～2.0mm, seasoning was used after 4～5 hours.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744404A (en) * | 2012-07-26 | 2012-10-24 | 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 |
| CN104761933A (en) * | 2015-03-13 | 2015-07-08 | 昆山长鹰硬质合金有限公司 | Coat and spraying process |
| CN105294136A (en) * | 2015-12-07 | 2016-02-03 | 河南省大地合金股份有限公司 | Coating for sintering of hard alloy |
| CN110039040A (en) * | 2019-04-11 | 2019-07-23 | 宁波顺达粉末冶金工业有限公司 | A kind of guider of shock absorber and preparation method thereof |
| CN110643929A (en) * | 2019-11-05 | 2020-01-03 | 江西省科学院应用物理研究所 | Anti-sticking coating on surface of hard alloy sintered boat and preparation method thereof |
| CN110922796A (en) * | 2019-12-16 | 2020-03-27 | 浙江名鹰合金材料有限公司 | Wear-resistant coating for graphite boat plate and preparation process thereof |
| CN113121250A (en) * | 2021-05-08 | 2021-07-16 | 丁威 | Preparation method of nano coating laminar flow steel brick |
| CN116102365A (en) * | 2022-12-30 | 2023-05-12 | 株洲精工硬质合金有限公司 | Graphite boat with coating and preparation method and application thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102744404A (en) * | 2012-07-26 | 2012-10-24 | 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 |
| 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 |
| CN104761933A (en) * | 2015-03-13 | 2015-07-08 | 昆山长鹰硬质合金有限公司 | Coat and spraying process |
| CN105294136A (en) * | 2015-12-07 | 2016-02-03 | 河南省大地合金股份有限公司 | Coating for sintering of hard alloy |
| CN110039040A (en) * | 2019-04-11 | 2019-07-23 | 宁波顺达粉末冶金工业有限公司 | A kind of guider of shock absorber and preparation method thereof |
| CN110039040B (en) * | 2019-04-11 | 2020-10-09 | 宁波顺达粉末冶金工业有限公司 | Guider of shock absorber and preparation method of guider |
| CN110643929A (en) * | 2019-11-05 | 2020-01-03 | 江西省科学院应用物理研究所 | Anti-sticking coating on surface of hard alloy sintered boat and preparation method thereof |
| CN110922796A (en) * | 2019-12-16 | 2020-03-27 | 浙江名鹰合金材料有限公司 | Wear-resistant coating for graphite boat plate and preparation process thereof |
| CN113121250A (en) * | 2021-05-08 | 2021-07-16 | 丁威 | Preparation method of nano coating laminar flow steel brick |
| CN116102365A (en) * | 2022-12-30 | 2023-05-12 | 株洲精工硬质合金有限公司 | Graphite boat with coating and preparation method and application thereof |
| CN116102365B (en) * | 2022-12-30 | 2024-05-03 | 株洲精工硬质合金有限公司 | Graphite boat with coating and preparation method and application thereof |
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Effective date of registration: 20220214 Address after: 330600 Industrial Park, Jing'an County, Yichun City, Jiangxi Province Patentee after: JIANGXI JIANGWU CEMENTED CARBIDE CO.,LTD. Address before: 330046 No. 118 West Beijing Road, Jiangxi, Nanchang Patentee before: JIANGXI RARE EARTH AND RARE METALS TUNGSTEN Group Corp. |
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