CN104384518A - Method for coating copper on surface of tungsten copper carbide alloy composite material - Google Patents
Method for coating copper on surface of tungsten copper carbide alloy composite material Download PDFInfo
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- CN104384518A CN104384518A CN201410580214.0A CN201410580214A CN104384518A CN 104384518 A CN104384518 A CN 104384518A CN 201410580214 A CN201410580214 A CN 201410580214A CN 104384518 A CN104384518 A CN 104384518A
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Abstract
The invention discloses a method for coating copper on a surface of a tungsten copper carbide composite material through infiltration sintering. The method comprises the following steps: performing spray drying on tungsten carbide powder of different particle sizes according to a certain weight percentage, then granulating, and performing die forming to obtain a framework compact; stamping oxygen-free copper into a copper bar with required weight to serve as a sintering infiltration agent; laminating the framework compact and the sintering infiltration agent together, placing in a graphite mold matched with the outer circle of the compact, heating in a vacuum furnace to 1,250 DEG C to sinter, preserving the heat for 1 h, sintering to obtain tungsten copper carbide alloy, and remaining a copper layer of 0.3-5 mm thick on the surface of the alloy, wherein the sintering and the copper coating are performed in one step, an obtained product has superior welding performance, and testing shows that the relative density reaches over 99 percent.
Description
Technical field
The invention belongs to metal material field, relate to the preparation technology of the immiscible alloy of two-phase, be specifically related to preparation method of tungsten carbide carbon/carbon-copper composite material and products thereof.
Background technology
Tungsten carbide copper powder metallurgy composite is by high-melting-point, the tungsten carbide of high rigidity and high connductivity, the pseudo-alloy that the copper of high thermal conductivity is formed, because it has good resistance to arc erosion, resistance fusion welding and high strength, the advantages such as high rigidity, be widely used as electrical contact material at present, electric resistance welding, spark machined and plasma electrode material, electrothermal alloy and heavy alloy, the military project material of specific use is (as rocket nozzle, aircraft larynx serves as a contrast), and computer central processing system, the lead frame of large scale integrated circuit, the heat sink substrate of the electronic devices such as solid state microwave pipe.
Tungsten carbide, as a kind of important raw material of industry, is widely used in the industries such as surface peening, abrasive material, cutter.Because it has high hardness, density, fusing point, the difficulty in production and process is comparatively large, usually adopts the method for powder metallurgy to prepare carbide parts.Therefore, the performance of performance to tungsten carbide series of products of tungsten-carbide powder has material impact.
The tungsten carbide powder that tungsten carbide powder or interpolation are mixed with a small amount of copper powder is made pressed compact, and infiltrated metal copper and tungsten carbide pressed compact are stacked together, then in reducing atmosphere or vacuum, sinter at the temperature higher than copper fusing point.In sintering process, rely on capillarity, make the copper of melting infiltrate tungsten carbide skeleton.Sintering and infiltration can separately carry out, and also can be combined into an operation, but the mode of sintered skeleton infiltration again can obtain the skeleton of higher-strength in advance, and make the more resistance to electrical arc erosion of this composite, infiltration density is generally 98% ~ 99% of solid density.
The present invention aims to provide the method that copper is covered on a kind of new tungsten carbide carbon/carbon-copper composite material surface, can obtain the even full densification of relative density of more than 99%, and hardness is high, the alloy conducted electricity very well.
Summary of the invention
The invention provides a kind of preparation method having the tungsten carbide Cu alloy material of copper clad layers, the even fully dense copper clad layers of relative density of more than 99% can be obtained, and hardness is high, the alloy conducted electricity very well.
Step of the present invention is as follows:
(1) tungsten carbide powder is mixed: be 0.05 μm by average grain diameter, 0.2 μm, 1 μm, 3 μm, the tungsten carbide powder of 8 μm mixes according to the ratio that percentage by weight is 1:2:3:3:1, the tungsten carbide powder mixed and copper is mixed, then adds the spray-dried granulation of a certain amount of forming agent;
(2) tungsten carbide skeleton compacting: compressing in a mold, pressing pressure 150 ~ 400MPa, obtains the tungsten carbide skeleton pressed compact with various given shape;
(3) oxygen-free copper is struck out the copper bar of demand weight as sintering and infiltration agent;
(4) skeleton pressed compact and sintering and infiltration agent are stacked together, be placed in the graphite mo(u)ld coordinated with its cylindrical, be warmed up to 1250 DEG C in a vacuum furnace to sinter, temperature retention time is 1h, sintering obtains tungsten carbide copper alloy, and leave the layers of copper of 0.3 ~ 5mm thickness at alloy surface, sinter and cover copper and once complete.
The weight ratio of the preferred tungsten carbide powder of step (1) and forming agent is 10:1;
Step (1) preferably forming agent is polyvinyl alcohol;
The mass percentage of the preferred wherein tungsten carbide copper powder proportioning of step (4) is tungsten carbide 90 ~ 95wt%, copper 5 ~ 10wt%.
Usefulness of the present invention is:
1, on tungsten carbide copper product, once sintered that to cover copper be advantage of the present invention, adopt the method easy to operate, whole preparation technology simply can control, and cost reduces;
2, adhere to by melting infiltration sintering tungsten carbide copper alloy surface the welding performance that certain thickness layers of copper improves tungsten carbide copper alloy;
3, the constraint of graphite mo(u)ld makes copper clad layers full;
4, alloy monolithic can obtain the even fully dense effect of relative density of more than 99%.
Accompanying drawing explanation
Fig. 1 is the stacked configuration rough schematic of tungsten carbide skeleton pressed compact and copper bar.
Detailed description of the invention
embodiment 1:
Have a preparation method for the tungsten carbide Cu alloy material of copper clad layers, its step is as follows:
(1) mix tungsten carbide powder: be 0.05 μm by average grain diameter, 0.2 μm, 1 μm, 3 μm, the tungsten carbide powder of 8 μm mixes according to the ratio that percentage by weight is 1:2:3:3:1;
(2) tungsten carbide skeleton compacting: the tungsten carbide powder mixed and copper are mixed, wherein the percentage composition of alloy material is tungsten carbide 90wt%, copper 10wt%, after adding the spray-dried granulation of a certain amount of polyvinyl alcohol again, compressing in a mold, pressing pressure 150 ~ 400MPa, obtains the tungsten carbide skeleton pressed compact with various given shape;
(3) oxygen-free copper is struck out the copper bar of demand weight as sintering and infiltration agent;
(4) skeleton pressed compact and sintering and infiltration agent are stacked together, be placed in the graphite mo(u)ld coordinated with its cylindrical, be warmed up to 1250 DEG C in a vacuum furnace to sinter, temperature retention time is 1h, sintering obtains tungsten carbide copper alloy, and leave the layers of copper of 0.3 ~ 5mm thickness at alloy surface, sinter and cover copper and once complete.
The relative density of product reaches 100% after testing.
embodiment 2:
Have a preparation method for the tungsten carbide Cu alloy material of copper clad layers, its step is as follows:
(1) mix tungsten carbide powder: be 0.05 μm by average grain diameter, 0.2 μm, 1 μm, 3 μm, the tungsten carbide powder of 8 μm mixes according to the ratio that percentage by weight is 1:2:3:3:1;
(2) tungsten carbide skeleton compacting: the tungsten carbide powder mixed and copper are mixed, wherein the percentage composition of alloy material is tungsten carbide 96wt%, copper 4wt%, after adding the spray-dried granulation of a certain amount of stearic acid again, compressing in a mold, pressing pressure 150 ~ 400MPa, obtains the tungsten carbide skeleton pressed compact with various given shape;
(3) oxygen-free copper is struck out the copper bar of demand weight as sintering and infiltration agent;
(4) skeleton pressed compact and sintering and infiltration agent are stacked together, be placed in the graphite mo(u)ld coordinated with its cylindrical, be warmed up to 1250 DEG C in a vacuum furnace to sinter, temperature retention time is 1h, sintering obtains tungsten carbide copper alloy, and leave the layers of copper of 0.3 ~ 5mm thickness at alloy surface, sinter and cover copper and once complete.
The relative density of product reaches more than 99% after testing.
embodiment 3:
Have a preparation method for the tungsten carbide Cu alloy material of copper clad layers, its step is as follows:
(1) mix tungsten carbide powder: be 0.05 μm by average grain diameter, 0.2 μm, 1 μm, 3 μm, the tungsten carbide powder of 8 μm mixes according to the ratio that percentage by weight is 1:2:3:3:1;
(2) tungsten carbide skeleton compacting: the tungsten carbide powder mixed and copper are mixed, wherein the percentage composition of alloy material is tungsten carbide 98wt%, copper 2wt%, after adding the spray-dried granulation of a certain amount of polyvinyl alcohol again, compressing in a mold, pressing pressure 150 ~ 400MPa, obtains the W skeleton pressed compact with various given shape;
(3) oxygen-free copper is struck out the copper bar of demand weight as sintering and infiltration agent;
(4) skeleton pressed compact and sintering and infiltration agent are stacked together, be placed in the graphite mo(u)ld coordinated with its cylindrical, be warmed up to 1250 DEG C in a vacuum furnace to sinter, temperature retention time is 1h, sintering obtains tungsten carbide copper alloy, and leave the layers of copper of 0.3 ~ 5mm thickness at alloy surface, sinter and cover copper and once complete.
The relative density of product reaches more than 99% after testing.
embodiment 4:
Have a preparation method for the tungsten carbide Cu alloy material of copper clad layers, its step is as follows:
(1) mix tungsten carbide powder: be 0.05 μm by average grain diameter, 0.2 μm, 1 μm, 3 μm, the tungsten carbide powder of 8 μm mixes according to the ratio that percentage by weight is 1:2:3:3:1;
(2) tungsten carbide skeleton compacting: the tungsten carbide powder mixed and copper are mixed, wherein the percentage composition of alloy material is tungsten carbide 92wt%, copper 8wt%, after adding the spray-dried granulation of a certain amount of polyvinyl alcohol again, compressing in a mold, pressing pressure 150 ~ 400MPa, obtains the W skeleton pressed compact with various given shape;
(3) oxygen-free copper is struck out the copper bar of demand weight as sintering and infiltration agent;
(4) skeleton pressed compact and sintering and infiltration agent are stacked together, be placed in the graphite mo(u)ld coordinated with its cylindrical, be warmed up to 1250 DEG C in a vacuum furnace to sinter, temperature retention time is 1h, sintering obtains tungsten carbide copper alloy, and leave the layers of copper of 0.3 ~ 5mm thickness at alloy surface, sinter and cover copper and once complete.
The relative density of product reaches more than 99% after testing.
Tungsten carbide copper product has once sintered and has covered copper technique simply can be controlled, cost reduces; The constraint of graphite mo(u)ld also makes copper clad layers fuller.Technique of the present invention is significantly better than prior art, is a kind of method that copper is covered on outstanding brand-new tungsten carbide carbon/carbon-copper composite material surface.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a method for copper is covered on tungsten carbide carbon/carbon-copper composite material surface, and its step is as follows:
(1) tungsten carbide powder is mixed: be 0.05 μm by average grain diameter, 0.2 μm, 1 μm, 3 μm, the tungsten carbide powder of 8 μm mixes according to the ratio that percentage by weight is 1:2:3:3:1, and the tungsten carbide powder mixed and copper powder are mixed, wherein the composition by weight percent of alloy material is tungsten carbide 90 ~ 98wt%, copper 2 ~ 10wt%, then after adding the spray-dried granulation of a certain amount of binder;
(2) tungsten carbide skeleton compacting: compressing in a mold, pressing pressure 150 ~ 400MPa, obtains the tungsten carbide skeleton pressed compact with various given shape;
(3) oxygen-free copper is struck out the copper bar of demand weight as sintering and infiltration agent;
(4) skeleton pressed compact and sintering and infiltration agent are stacked together, be placed in the graphite mo(u)ld coordinated with its cylindrical, be warmed up to 1250 DEG C in a vacuum furnace to sinter, temperature retention time is 1h, sintering obtains tungsten carbide copper alloy, and leave the layers of copper of 0.3 ~ 5mm thickness at alloy surface, sinter and cover copper and once complete.
2. method according to claim 2, is characterized in that the weight ratio of step (2) described tungsten carbide powder and forming agent is 10:1.
3. method according to claim 3, is characterized in that the binder in the weight ratio of step (2) described tungsten carbide powder and binder is polyvinyl alcohol.
4. the tungsten carbide copper alloy of copper is covered on the surface that the method described in claim 1-3 prepares.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105568209A (en) * | 2016-03-04 | 2016-05-11 | 西安理工大学 | In-situ formation preparation method for gradient WC-strengthened CuW composite material |
| CN108893642A (en) * | 2018-06-25 | 2018-11-27 | 浙江立泰复合材料股份有限公司 | A kind of preparation method of contact material of vacuum switch |
| WO2019037651A1 (en) * | 2017-08-23 | 2019-02-28 | 安泰天龙（宝鸡）钨钼科技有限公司 | Boron-containing tungsten carbide copper alloy and method for manufacturing same |
| CN109609792A (en) * | 2018-12-17 | 2019-04-12 | 河源市凯源硬质合金有限公司 | A method of preparing tungsten-copper alloy |
| CN110823656A (en) * | 2019-11-06 | 2020-02-21 | 株洲硬质合金集团有限公司 | Preparation method of tungsten carbide mosaic sample |
| CN111621661A (en) * | 2020-06-09 | 2020-09-04 | 山东威尔斯通钨业有限公司 | Preparation method of tungsten carbide copper |
| CN115522090A (en) * | 2021-10-29 | 2022-12-27 | 山东威尔斯通钨业有限公司 | Method and treatment equipment for coating copper on surface of tungsten carbide copper composite material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568209A (en) * | 2016-03-04 | 2016-05-11 | 西安理工大学 | In-situ formation preparation method for gradient WC-strengthened CuW composite material |
| WO2019037651A1 (en) * | 2017-08-23 | 2019-02-28 | 安泰天龙（宝鸡）钨钼科技有限公司 | Boron-containing tungsten carbide copper alloy and method for manufacturing same |
| CN108893642A (en) * | 2018-06-25 | 2018-11-27 | 浙江立泰复合材料股份有限公司 | A kind of preparation method of contact material of vacuum switch |
| CN109609792A (en) * | 2018-12-17 | 2019-04-12 | 河源市凯源硬质合金有限公司 | A method of preparing tungsten-copper alloy |
| CN110823656A (en) * | 2019-11-06 | 2020-02-21 | 株洲硬质合金集团有限公司 | Preparation method of tungsten carbide mosaic sample |
| CN111621661A (en) * | 2020-06-09 | 2020-09-04 | 山东威尔斯通钨业有限公司 | Preparation method of tungsten carbide copper |
| CN115522090A (en) * | 2021-10-29 | 2022-12-27 | 山东威尔斯通钨业有限公司 | Method and treatment equipment for coating copper on surface of tungsten carbide copper composite material |
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Address after: 313219 Zhejiang city of Huzhou province Deqing County leidian town revitalization Road No. 7 Patentee after: Zhejiang Li Tai composite limited company Address before: 313000 Zhejiang city of Huzhou province Deqing County LEIDIAN Town Industrial Park Patentee before: Zhejiang Light-tough Composite Materials Co., Ltd. |
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Denomination of invention: A method of copper coating on WC-Cu composite Effective date of registration: 20210531 Granted publication date: 20160504 Pledgee: Zhejiang Deqing Rural Commercial Bank Co.,Ltd. leidian sub branch Pledgor: ZHEJIANG LIGHT-TOUGH COMPOSITE MATERIALS Co.,Ltd. Registration number: Y2021330000496 |