Melting and infiltration combination method for powder metallurgy

A technology of powder metallurgy and infiltration, which is applied in the field of powder metallurgy, can solve the problems of affecting the performance of powder metallurgy parts, failing to meet the use requirements, and insufficient hardness, etc., to achieve improved copper infiltration effect, high copper infiltration efficiency, and high production efficiency Effect

Inactive Publication Date: 2019-05-07
益阳市再超粉末冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the powder metallurgy parts manufactured by the conventional pressing-sintering process cannot reach a completely dense state during the pressing process, and the residual pores will affect the performance of the powder metallurgy parts, and the iron-based powder metallurgy parts often have low strength. , Insufficient hardness and other problems, so that it cannot meet the requirements of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A powder metallurgy infiltration bonding method, comprising the steps of:

[0023] S1. Raw material mixing: Weigh 90 parts of iron powder, 1.0 part of graphene, 0.1 part of lanthanum oxide, 1.0 part of vanadium powder, 0.5 part of cobalt powder, 1.5 parts of chromium powder, 1.0 part of zinc powder, 2.0 parts of calcium oxide, and 2.0 parts of magnesium powder 0.2 parts of titanium carbide, 0.1 parts of aluminum nitride, and 0.6 parts of lubricant are added to a high-speed ball mill to control the speed of the mill to 400r / min, and the grinding and mixing time is 2-3h to obtain a mixed powder.

[0024] S2. Compression: Infiltrate the inner wall of the pressing mold with a powder metallurgy release agent, then add the mixture obtained in S1 into the pressing mold to form a blank, the pressing pressure is 400-500MPa, and the pressing density is 6.5-7.3g / cm 3 ;

[0025] S3, sintering: put the blank obtained in S2 into a vacuum sintering furnace for vacuum sintering to m...

Embodiment 2

[0031] A powder metallurgy infiltration bonding method, comprising the steps of:

[0032] S1. Raw material mixing: Weigh 100 parts of iron powder, 1.5 parts of graphene, 0.05 part of lanthanum oxide, 1.5 parts of vanadium powder, 1.0 part of cobalt powder, 1.0 part of chromium powder, 1.5 parts of zinc powder, 1.5 parts of calcium oxide, and 3.0 parts of magnesium powder 0.1 part of titanium carbide, 0.05 part of aluminum nitride, and 0.5 part of lubricant are added to a high-speed ball mill to control the speed of the mill to 400r / min, and the grinding and mixing time is 2-3h to obtain a mixed powder.

[0033] S2. Compression: Infiltrate the inner wall of the pressing mold with a powder metallurgy release agent, then add the mixture obtained in S1 into the pressing mold to form a blank, the pressing pressure is 400-500MPa, and the pressing density is 6.5-7.3g / cm 3 ;

[0034] S3, sintering: put the blank made in S2 into a vacuum sintering furnace for vacuum sintering to mak...

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Abstract

The invention discloses a melting and infiltration combination method for powder metallurgy. The melting and infiltration combination method comprises the steps of raw material mixing, compression moulding, sintering, copper infiltration and the like. The raw materials comprise, by weight part, 90-100 parts of iron powder, 1.0-1.5 parts of graphene, 0.05-0.1 part of lanthanum oxide, 1.0-1.5 partsof vanadium powder, 0.5-1.0 part of cobalt powder, 1.0-1.5 parts of chromium powder, 1.0-1.5 parts of zinc powder, 1.5-2.0 parts of calcium oxide, 2.0-3.0 parts of magnesium powder, 0.1-0.2 part of titanium carbide, 0.05-0.1 part of aluminum nitride and 0.5-0.6 part of a lubricating agent. A copper infiltration agent is prepared from, by weight part, 90-100 parts of copper powder, 2.0-3.0 parts ofiron powder, 0.5-1.0 part of nickel powder, 0.5-1.0 part of manganese powder, 0.5-1.0 part of molybdenum powder, 0.5-1.0 part of aluminum powder, 0.5-1.0 part of tin powder and 0.5-0.6 part of zinc stearate powder. The method is reasonable in raw material formula, simple in process and high in production efficiency, and produced and prepared parts have the beneficial effects of being excellent instrength, hardness, wear resisting performance and impact resisting performance.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a powder metallurgy dissolution and infiltration bonding method. Background technique [0002] With the development of powder metallurgy technology, powder metallurgy structural parts are more and more widely used in various industries, providing a larger market for the application of iron-based powder metallurgy parts. At the same time, the market has higher and higher requirements for the performance of powder metallurgy parts, which not only require parts to have good wear resistance and impact resistance, but also require parts to have high strength and hardness. However, the powder metallurgy parts manufactured by the conventional pressing-sintering process cannot reach a completely dense state during the pressing process, and the residual pores will affect the performance of the powder metallurgy parts, and the iron-based powder metallurgy parts often have low str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/24C22C38/28C22C38/30C22C33/02B22F1/00B22F3/02B22F3/10B22F3/26
Inventor 李建峰钟训华钟智超符人慧
Owner 益阳市再超粉末冶金有限公司
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