CN102909370A - Method for sintering damage-proof filler gasket of hard alloy ball - Google Patents
Method for sintering damage-proof filler gasket of hard alloy ball Download PDFInfo
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- CN102909370A CN102909370A CN201210444766XA CN201210444766A CN102909370A CN 102909370 A CN102909370 A CN 102909370A CN 201210444766X A CN201210444766X A CN 201210444766XA CN 201210444766 A CN201210444766 A CN 201210444766A CN 102909370 A CN102909370 A CN 102909370A
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- sintered carbide
- carbide ball
- sintering
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Abstract
The invention provides a method for sintering a damage-proof filler gasket of a hard alloy ball, relates to the technical field of hard alloy manufacture, and aims to solve the technical problem that the bottom of the ball can be pressed into a platform when the hard alloy ball is placed on a graphite boat for sintering in the prior art, which causes product scrap and the like. According to the method provided by the invention, aluminum sesquioxide filler spheres (2), of which the particle sizes rang from 1 to 3 mm, are placed into a graphite box (3) to serve as filler lining material; the difference value between the filling height of the aluminum sesquioxide filler spheres (2) in the graphite box (3) and the radius of hard alloy ball pressed shapes (1) is not smaller than 1 to 3 cm; after the filling of the aluminum sesquioxide filler spheres (2) is fulfilled, the hard alloy ball pressed shapes (1) are placed on the aluminum sesquioxide filler spheres (2), and the interval between adjacent hard alloy ball pressed shapes (1) is not smaller than 1 cm; and after being arranged, the hard alloy ball pressed shapes (1) enter a vacuum sintering oven for sintering.
Description
Technical field
The present invention relates to carbide alloy manufacturing technology field, can not produce with the liner boat a kind of loss prevention matrix liner sintering method that contact, can not be pressed into platform bottom ball when particularly controlling the sintered carbide ball sintering.
Background technology
The carbide alloy manufacturing process mainly is comprised of compound preparation, moulding and sintering three parts.Sintering normally is placed on product and completes on graphite boat.The sintering of carbide alloy belongs to liquid-phase sintering, be sintered body and be accurate mecystasis when the high temperature of degree more than 1400 burns, impact due to Action of Gravity Field, if sintered carbide ball is placed directly in carries out sintering on graphite boat, sintered carbide ball is produced with the liner boat to be contacted, the ball bottom will be pressed into platform, makes product become waste product.Make the sintered carbide ball sintering quality can be controlled, the technical problem of eliminating the sintered carbide ball bottom platform must effectively be solved.
Summary of the invention
The present invention be intended to solve existing when directly sintered carbide ball being placed on sintering on graphite boat the ball bottom can be pressed into platform, make the technical problem of product rejection, with provide a kind of have can not be pressed into can effectively control sintered carbide ball bottom sintering the time platform, significantly improve yield rate, use simple and reliable sintered carbide ball loss prevention matrix liner sintering method.
The objective of the invention is to be achieved through the following technical solutions.
Sintered carbide ball loss prevention matrix liner sintering method of the present invention, alundum (Al2O3) sphere padding 2 take particle diameter as 1-3mm is put into graphite 3 as the matrix liner thing, the difference that the loading height of alundum (Al2O3) sphere padding 2 in graphite 3 deducts sintered carbide ball pressed compact 1 radius size is not less than 1-3cm, after filling alundum (Al2O3) sphere padding 2 is complete, sintered carbide ball pressed compact 1 is placed on alundum (Al2O3) sphere padding 2, adjacent sintered carbide ball pressed compact 1 spacing is not less than 1cm, enters vacuum sintering furnace after sintered carbide ball pressed compact 1 is arranged and completed and carries out sintering.
The degree of depth that sintered carbide ball loss prevention matrix liner sintering method of the present invention, wherein said sintered carbide ball pressed compact 1 are placed in alundum (Al2O3) sphere padding 2 is 1/3～1/2 of sintered carbide ball pressed compact 1 radius.
The beneficial effect of sintered carbide ball loss prevention matrix liner sintering method of the present invention:
1. sintering shrinkage overall process sintered carbide ball by the alundum (Al2O3) spherolite liner of the sphere of fitting in a large number, can not contact with the graphite bottom surface all the time, produces ball bottom platform waste product;
2. the vavuum pump draft can not be taken the alundum (Al2O3) spherolite away, can not destroy sintering atmosphere in stove, can not cause the vavuum pump wearing and tearing.As use the alundum (Al2O3) powder, will occur destroying in stove sintering atmosphere outer, cause the problems such as vavuum pump wearing and tearing;
3. method is simple and reliable;
4. be applicable to the liner sintering of various abnormal complex hart metal products.
Description of drawings
Fig. 1 working state schematic representation of the present invention
The number in the figure explanation:
1 sintered carbide ball pressed compact, 2 alundum (Al2O3) sphere paddings, 3 graphites
The specific embodiment
Sintered carbide ball loss prevention matrix liner sintering method of the present invention is further described by following embodiment.
In the sintering shrinkage overall process, sintered carbide ball is all the time by the alundum (Al2O3) spherolite liner of the sphere of fitting in a large number, its principle that can not contact with the graphite bottom surface is: during sintering shrinkage, the diameter of sintered carbide ball can diminish, pressure to the alundum (Al2O3) spherolite of liner can increase, and causes sintered carbide ball to push downwards.Extruded alundum (Al2O3) spherolite produces staggered slippage and abdicates the space and taken by sintered carbide ball, and the sintered carbide ball sintering shrinkage diameter space that stays that diminishes also can be filled constantly by the alundum (Al2O3) spherolite of staggered slippage simultaneously.Thereby realize sintering shrinkage overall process sphere applying support.Fill out section's loading height greater than 1 to 3 centimetre of sintered carbide ball pressed compact radius because of the alundum (Al2O3) spherolite, guaranteed sintering shrinkage overall process sintered carbide ball all the time by the alundum (Al2O3) spherolite with the arc surface liner, can not contact with the graphite bottom surface.
Below the invention will be further described by specific embodiment.
Embodiment 1:
Sintered carbide ball product diameter D=30mm
Constriction coefficient: K=1.22
Sintered carbide ball damages radius R=18.3mm by pressure
Bulk 200mm * 200mm in graphite * 30mm
The alundum (Al2O3) spherolite is filled out the loading height 20mm of section
The sintered carbide ball pressed compact is put into 4 row's 4 row, 4 of every dischargings, totally 16
Sintered carbide ball is put into the alundum (Al2O3) spherolite and is filled out the degree of depth 8mm that trembles
More than the alundum (Al2O3) spherolite is housed fills out to tremble and put into vacuum sintering furnace with the graphite of sintered carbide ball and carry out sintering, after sintering, sintered carbide ball produces without the bottom platform.
Embodiment 2:
Sintered carbide ball product diameter D=55mm
Constriction coefficient: K=1.25
Sintered carbide ball damages radius R=34.4mm by pressure
Bulk 180mm * 180mm in graphite * 55mm
The alundum (Al2O3) spherolite is filled out the loading height 37mm of section
The sintered carbide ball pressed compact is put into 2 row's 2 row, 2 of every dischargings, totally 4
Sintered carbide ball is put into the alundum (Al2O3) spherolite and is filled out the degree of depth 15mm that trembles
More than the alundum (Al2O3) spherolite is housed fills out to tremble and put into vacuum sintering furnace with the graphite of sintered carbide ball and carry out sintering, after sintering, sintered carbide ball produces without the bottom platform.
Embodiment 3:
Sintered carbide ball product diameter D=107mm
Constriction coefficient: K=1.28
Sintered carbide ball damages radius R=68.5mm by pressure
Bulk 180mm * 180mm in graphite * 100mm
The alundum (Al2O3) spherolite is filled out the loading height 85mm of section
The sintered carbide ball pressed compact is put into 1 row's 1 row, 1 of every discharging, totally 1
Sintered carbide ball is put into the alundum (Al2O3) spherolite and is filled out the degree of depth 30mm that trembles
More than the alundum (Al2O3) spherolite is housed fills out to tremble and put into vacuum sintering furnace with the graphite of sintered carbide ball and carry out sintering, after sintering, sintered carbide ball produces without the bottom platform.
In sum, sintered carbide ball loss prevention matrix liner sintering method of the present invention is selected the alundum (Al2O3) spherolite to fill out and is trembled to do liner, and calculate the alundum (Al2O3) spherolite according to the size of sintered carbide ball and fill out put spacing and the sintered carbide ball of trembling loading height, ball and put into the alundum (Al2O3) spherolite and fill out the degree of depth of trembling, sintering shrinkage overall process sintered carbide ball all the time by the alundum (Al2O3) spherolite with the arc surface liner of fitting, can not contact with the graphite bottom surface, can not produce the bottom platform waste product.
Claims (2)
1. sintered carbide ball loss prevention matrix liner sintering method, it is characterized in that: the alundum (Al2O3) sphere padding (2) take particle diameter as 1-3mm is put into graphite (3) as the matrix liner thing, the difference that the loading height of alundum (Al2O3) sphere padding (2) in graphite (3) deducts sintered carbide ball pressed compact (1) radius size is not less than 1-3cm, after filling alundum (Al2O3) sphere padding (2) is complete, sintered carbide ball pressed compact (1) is placed on alundum (Al2O3) sphere padding (2), adjacent sintered carbide ball pressed compact (1) spacing is not less than 1cm, enter vacuum sintering furnace after sintered carbide ball pressed compact (1) is arranged and completed and carry out sintering.
2. sintered carbide ball loss prevention matrix liner sintering method according to claim 1, it is characterized in that: the degree of depth that described sintered carbide ball pressed compact (1) is placed in alundum (Al2O3) sphere padding (2) is 1/3～1/2 of sintered carbide ball pressed compact (1) radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210444766XA CN102909370A (en) | 2012-11-09 | 2012-11-09 | Method for sintering damage-proof filler gasket of hard alloy ball |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210444766XA CN102909370A (en) | 2012-11-09 | 2012-11-09 | Method for sintering damage-proof filler gasket of hard alloy ball |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498684A (en) * | 2015-01-19 | 2015-04-08 | 四川科力特硬质合金股份有限公司 | Decarburization method for hard alloy in vacuum sintering furnace |
| CN104493161A (en) * | 2015-01-19 | 2015-04-08 | 四川科力特硬质合金股份有限公司 | Carburization method for hard alloy in vacuum sintering furnace |
| CN107764069A (en) * | 2017-09-21 | 2018-03-06 | 中国科学院长春光学精密机械与物理研究所 | A kind of supporting construction of large scale silicon carbide reaction-sintered sintering process |
| CN109536763A (en) * | 2018-12-12 | 2019-03-29 | 株洲金韦硬质合金有限公司 | A kind of sintering process of miniature cemented carbide pellet |
| CN111318693A (en) * | 2018-12-13 | 2020-06-23 | 株洲欧科亿数控精密刀具股份有限公司 | Vacuum sintering process for hard alloy saw teeth |
| CN113686157A (en) * | 2021-08-27 | 2021-11-23 | 苏州中耀科技有限公司 | Sintering jig |
| CN115287423A (en) * | 2022-08-05 | 2022-11-04 | 浙江恒成硬质合金有限公司 | Preparation method of gradient hard alloy |
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| EP0599371A1 (en) * | 1992-11-18 | 1994-06-01 | Philips Composants Et Semiconducteurs | Process and sintering means for ferrite sectors |
| DE19547601A1 (en) * | 1995-12-20 | 1997-06-26 | Sel Alcatel Ag | Temperature gradient sintering furnace |
| CN102230099A (en) * | 2011-04-01 | 2011-11-02 | 浙江恒成硬质合金有限公司 | Protective device for ultrahigh fine hard alloy sintered product |
| CN202137807U (en) * | 2011-06-03 | 2012-02-08 | 株洲精工硬质合金有限公司 | Graphite boat for sintering hard alloy product |
| CN202329202U (en) * | 2011-11-21 | 2012-07-11 | 越峰电子(广州)有限公司 | Pad sintering furnace material for sintering soft magnetic ferrite |
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- 2012-11-09 CN CN201210444766XA patent/CN102909370A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0599371A1 (en) * | 1992-11-18 | 1994-06-01 | Philips Composants Et Semiconducteurs | Process and sintering means for ferrite sectors |
| DE19547601A1 (en) * | 1995-12-20 | 1997-06-26 | Sel Alcatel Ag | Temperature gradient sintering furnace |
| CN102230099A (en) * | 2011-04-01 | 2011-11-02 | 浙江恒成硬质合金有限公司 | Protective device for ultrahigh fine hard alloy sintered product |
| CN202137807U (en) * | 2011-06-03 | 2012-02-08 | 株洲精工硬质合金有限公司 | Graphite boat for sintering hard alloy product |
| CN202329202U (en) * | 2011-11-21 | 2012-07-11 | 越峰电子(广州)有限公司 | Pad sintering furnace material for sintering soft magnetic ferrite |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498684A (en) * | 2015-01-19 | 2015-04-08 | 四川科力特硬质合金股份有限公司 | Decarburization method for hard alloy in vacuum sintering furnace |
| CN104493161A (en) * | 2015-01-19 | 2015-04-08 | 四川科力特硬质合金股份有限公司 | Carburization method for hard alloy in vacuum sintering furnace |
| CN104498684B (en) * | 2015-01-19 | 2017-01-25 | 四川科力特硬质合金股份有限公司 | Decarburization method for hard alloy in vacuum sintering furnace |
| CN107764069A (en) * | 2017-09-21 | 2018-03-06 | 中国科学院长春光学精密机械与物理研究所 | A kind of supporting construction of large scale silicon carbide reaction-sintered sintering process |
| CN107764069B (en) * | 2017-09-21 | 2018-11-27 | 中国科学院长春光学精密机械与物理研究所 | A kind of support construction of large scale silicon carbide reaction-sintered sintering process |
| CN109536763A (en) * | 2018-12-12 | 2019-03-29 | 株洲金韦硬质合金有限公司 | A kind of sintering process of miniature cemented carbide pellet |
| CN111318693A (en) * | 2018-12-13 | 2020-06-23 | 株洲欧科亿数控精密刀具股份有限公司 | Vacuum sintering process for hard alloy saw teeth |
| CN111318693B (en) * | 2018-12-13 | 2022-03-11 | 株洲欧科亿数控精密刀具股份有限公司 | Vacuum sintering process for hard alloy saw teeth |
| CN113686157A (en) * | 2021-08-27 | 2021-11-23 | 苏州中耀科技有限公司 | Sintering jig |
| CN115287423A (en) * | 2022-08-05 | 2022-11-04 | 浙江恒成硬质合金有限公司 | Preparation method of gradient hard alloy |
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Application publication date: 20130206 |