CN202376928U - Coating preparation system for sintering hard alloy - Google Patents
Coating preparation system for sintering hard alloy Download PDFInfo
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- CN202376928U CN202376928U CN201120548901.6U CN201120548901U CN202376928U CN 202376928 U CN202376928 U CN 202376928U CN 201120548901 U CN201120548901 U CN 201120548901U CN 202376928 U CN202376928 U CN 202376928U
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Abstract
A coating preparation system for sintering a hard alloy is characterized in that the coating preparation system comprises a raw coating preparation device, a raw coating stirring device and a coating spreading device, the raw coating preparation device is provided with an aluminum oxide powder doser, a polyethylene glycol doser, an alcohol doser, a deionized water doser and a raw coating container, the raw coating stirring device is arranged at the downstream of the raw coating preparation device, contains mixed liquor prepared by the raw coating preparation device and is provided with a stirrer for stirring the mixed liquor at a uniform speed to obtain uniform turbid liquid, the coating spreading device is arranged at the downstream of the raw coating stirring device and used for uniformly spreading the obtained turbid liquid on a graphite boat, and the thickness of a coating layer ranges from 0.5mm to 2.0mm. The coating preparation system has the advantages that coating components are simple, operability is high, quality is stable, the turbid liquid is easily and uniformly spread on the graphite boat, drying is simple and practical, and bending, deformation, carburization and the like due to adhesion of hard alloy products on the graphite boat can be prevented.
Description
Technical field
The utility model relates to a kind of coating preparation system 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 institutional framework, and the magnetic saturation value is requiring the position relatively; The grain size appropriateness, evenly; Cobalt is evenly distributed mutually; Porosity is little, prevents product distortion, bending and peeling etc.
In the process of sintering, 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-making 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 interior diffusion, it is higher that local concentration of carbon 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 concentration of carbon still is higher than the required carbon content of alloy two phase structures; Local carburzing 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 key component is made with graphite powder, metallurgical carbon black, metal oxide, 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 20～40%, tween 4～8%, polyvinyl alcohol 0.2～1.0%, formaldehyde 0.05～0.5%, alumina powder 1～5%, water-soluble glue 0.1～1.0%, distilled water 50～70%; This coating composition has strong adhesion; Be easy to during brushing be uniformly dispersed; To characteristics such as the antistick characteristic of hard metal article is good, and preparing 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 carbide alloy.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 coating that is used for the high-cobalt hart metal product sintering; Its constituent has 6 kinds, and mass percent is: high-purity carbon black 25-40%, high purity titanium white powder TiO26-12%; Polyethylene glycol 1-4%; Glycerine 0.2-1.0%, n-butanol 0.2-1.0%, ionized water 40-67%.This coating is 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, dependable performance.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 key component 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 key component 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 key component has oxide, carbon black, distilled water etc.
Patent documentation CN1005097B discloses the antiseized carbon element gluing of a kind of hard alloy vacuum sintering, and its key component has high-purity carbon materials, hexamethylenetetramine, surfactant, water purification etc.
The above-mentioned prior art patent document that belongs to is a key component with carbon black or graphite powder, 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 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 percentage by weight 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.
The utility model content
The purpose of the utility model provides a kind of coating preparation system that is used for sintering cemented carbide; It is 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. occurring.
For this reason; The utility model provides a kind of coating preparation system of sintering cemented carbide; It is characterized in that; This coating preparation system comprises: the coating raw material device for formulating, and it has the storage container of alumina powder doser, polyethylene glycol doser, alcohol doser, deionized water doser and coating raw material; The coating raw material agitating device, the downstream that it is arranged at said coating raw material device for formulating hold the mixed solution by the preparation of said coating raw material device for formulating, and have it is at the uniform velocity stirred to obtain the agitator of even suspension body; And varnish coating device, it is arranged at the downstream of said coating raw material agitating device, and evenly brushing is on graphite boat with the said turbid liquid that obtains, and coating layer thickness is 0.5～2.0mm.
Preferably, the storage container of said coating raw material also is the coating raw material agitating device.
Preferably, the alumina powder doser capacity that has once or repeat repeatedly to realize to prepare by 30～50 weight %; The capacity that the polyethylene glycol doser has once or repeats repeatedly to realize to prepare according to 4～10 weight %; The capacity that the alcohol doser has once or repeats repeatedly to realize to prepare according to 40～70 weight %; The capacity that the deionized water doser has once or repeats repeatedly to realize to prepare according to 6～12 weight %.
Preferably, one of them is the automatic Open valve of setting gravity threshold value at least for said alumina powder doser, said polyethylene glycol doser, said alcohol doser, said deionized water doser.
Preferably, one of them is a balance at least for said alumina powder doser, said polyethylene glycol doser, said alcohol doser, said deionized water doser.
Preferably, said agitator is spoon or poking bar.
Preferably, said coating raw material agitating device is a beaker.
Preferably, said varnish coating device is a hairbrush.
Preferably, also has mixing timer.
Preferably, also has mixing timer air dry timer.
The utility model only relates to 4 kinds of paint ingredients.Raw material obtains easily, and cost is also lower.The preparation of coating is simpler, and operability is stronger, and production cost reduces significantly.
Description of drawings
Fig. 1 is the sketch map according to the coating preparation system of the sintering cemented carbide of the utility model.
The specific embodiment
Alumina powder is a main body of making coating, can on boat, form layer of even aluminium oxide bisque in the time of sintering, does not ftracture, peels off.
Polyethylene glycol (PEG6000) is as helper component, and it is insoluble to alcohol, and water soluble can improve the liquid viscosity of suspension, the uniformity of coating layer thickness when guaranteeing the coating brushing.
Alcohol and deionized water mainly are the effects of its dissolving polyethylene glycol, and after the coating suspension is painted on boat, but alcohol and deionized water rapid and natural are dry.
Alumina powder 30 weight %, polyethylene glycol 10 weight %, alcohol 48 weight %, deionized water 12 weight % stir above component and get final product.
Alumina powder 35 weight %, polyethylene glycol 8 weight %, alcohol 47 weight %, deionized water 10 weight % stir above component and get final product.
Alumina powder 44 weight %, polyethylene glycol 4 weight %, alcohol 46 weight %, deionized water 6 weight % stir above component and get final product.
The utility model can also have other many specific embodiments, and the composition of each embodiment comprises: alumina powder, polyethylene glycol, alcohol and deionized water.
The content of alumina powder, polyethylene glycol, alcohol and deionized water composition is separate each other, and composition is: alumina powder 30～50 weight %, polyethylene glycol 4～10 weight %, alcohol 40～70 weight %, deionized water 6～12 weight %.
Specifically, the content of alumina 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 polyethylene 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 carbide alloy examples of paints commonly used of illustration.Composition comprises; Graphite powder 30 weight %; Tween 6 weight %; Polyvinyl alcohol 0.6 weight %; Formaldehyde 0.3 weight %; Alumina powder 3 weight %; Water-soluble glue 0.6 weight %; Distilled water 59.5 weight %.
Raw material is ready on request, polyvinyl alcohol is used the distilled 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 distilled water then and adopted mechanical agitation 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 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 coating layer thickness 0.5-2mm respectively; Air dry 5 hours; After checking respectively then, the alloy bar material product of putting
carries out sintering, and result of the test 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 the utility model component 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. the coating preparation system of a sintering cemented carbide; It is characterized in that; This coating preparation system comprises: the coating raw material device for formulating, and it has the storage container of alumina powder doser, polyethylene glycol doser, alcohol doser, deionized water doser and coating raw material; The coating raw material agitating device, the downstream that it is arranged at said coating raw material device for formulating hold the mixed solution by the preparation of said coating raw material device for formulating, and have it is at the uniform velocity stirred to obtain the agitator of even suspension body; And varnish coating device, it is arranged at the downstream of said coating raw material agitating device, and evenly brushing is on graphite boat with the said turbid liquid that obtains, and coating layer thickness is 0.5～2.0mm.
2. coating preparation system as claimed in claim 1 is characterized in that, the storage container of said coating raw material also is the coating raw material agitating device.
3. according to claim 1 or claim 2 coating preparation system is characterized in that the capacity that the alumina powder doser has once or repeats repeatedly to realize to prepare by 30～50 weight %; The capacity that the polyethylene glycol doser has once or repeats repeatedly to realize to prepare according to 4～10 weight %; The capacity that the alcohol doser has once or repeats repeatedly to realize to prepare according to 40～70 weight %; The capacity that the deionized water doser has once or repeats repeatedly to realize to prepare according to 6～12 weight %.
4. according to claim 1 or claim 2 coating preparation system; It is characterized in that one of them is the automatic Open valve of setting gravity threshold value at least for said alumina powder doser, said polyethylene glycol doser, said alcohol doser, said deionized water doser.
5. according to claim 1 or claim 2 coating preparation system is characterized in that one of them is a balance at least for said alumina powder doser, said polyethylene glycol doser, said alcohol doser, said deionized water doser.
6. according to claim 1 or claim 2 coating preparation system is characterized in that, said agitator is spoon or poking bar.
7. according to claim 1 or claim 2 coating preparation system is characterized in that said coating raw material agitating device is a beaker.
8. according to claim 1 or claim 2 coating preparation system is characterized in that said varnish coating device is a hairbrush.
9. according to claim 1 or claim 2 coating preparation system is characterized in that also having mixing timer.
10. according to claim 1 or claim 2 coating preparation system is characterized in that also having mixing timer air dry timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120548901.6U CN202376928U (en) | 2011-12-23 | 2011-12-23 | Coating preparation system for sintering hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120548901.6U CN202376928U (en) | 2011-12-23 | 2011-12-23 | Coating preparation system for sintering hard alloy |
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| CN202376928U true CN202376928U (en) | 2012-08-15 |
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|---|---|---|---|
| CN201120548901.6U Expired - Fee Related CN202376928U (en) | 2011-12-23 | 2011-12-23 | Coating preparation system for sintering hard alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191510A (en) * | 2014-08-18 | 2014-12-10 | 济南建源机械制造有限公司 | Automatic component color pouring machine |
| CN106540611A (en) * | 2016-11-28 | 2017-03-29 | 山东国元新材料有限公司 | Foam dust suppression agent automated production equipment and production method |
| CN108176294A (en) * | 2018-03-04 | 2018-06-19 | 华北理工大学 | A kind of powder metallurgy milling and feed device |
| CN110538606A (en) * | 2019-10-12 | 2019-12-06 | 南京中亚重工机械有限公司 | Production line device for automatically producing facing materials |
-
2011
- 2011-12-23 CN CN201120548901.6U patent/CN202376928U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191510A (en) * | 2014-08-18 | 2014-12-10 | 济南建源机械制造有限公司 | Automatic component color pouring machine |
| CN104191510B (en) * | 2014-08-18 | 2016-08-24 | 济南建源机械制造有限公司 | Automatization's component color casting machine |
| CN106540611A (en) * | 2016-11-28 | 2017-03-29 | 山东国元新材料有限公司 | Foam dust suppression agent automated production equipment and production method |
| CN108176294A (en) * | 2018-03-04 | 2018-06-19 | 华北理工大学 | A kind of powder metallurgy milling and feed device |
| CN110538606A (en) * | 2019-10-12 | 2019-12-06 | 南京中亚重工机械有限公司 | Production line device for automatically producing facing materials |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20171223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |