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Preparation process of powder metallurgy component

A preparation process, powder metallurgy technology, applied in metal material coating process, metal processing equipment, coating and other directions, can solve the problems of low surface hardness, insufficient wear resistance, shorten the service life of the workpiece, etc., to improve the mutual bonding force , reduce friction and prolong service life

Inactive Publication Date: 2019-12-20
深圳市冠强粉末冶金制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface hardness of the workpiece obtained by existing powder metallurgy is low, and the wear resistance is not enough, which greatly shortens the service life of the workpiece

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation process of powder metallurgy parts, comprising the following steps:

[0035] S1. Mixing: Weigh 100 parts of iron powder, 1 part of copper powder, 2 parts of manganese powder, 0.3 part of molybdenum powder, 2 parts of tantalum carbide powder, 1 part of lubricant and 1 part of adhesive according to the proportion of components by weight. And mix evenly, the mixing time is 1.5 hours, you can add grinding balls when mixing, and get a uniform mixture;

[0036] S2. Compression: use a powder molding machine to compress the mixture to obtain a green body with a certain density and strength;

[0037] S2', use the vacuum system to remove the mixture powder attached to the surface of the green body, and the vacuum system takes out the uncompacted powder on the surface of the green body, so as to prevent these powders from bubbling during the sintering process and make the surface of the sintered workpiece smoother ;

[0038] S3. Sintering: The pressed green body is...

Embodiment 2

[0044] A preparation process of powder metallurgy parts, comprising the following steps:

[0045] S1. Mixing: Weigh 100 parts of iron powder, 1 part of copper powder, 2 parts of manganese powder, 0.3 part of molybdenum powder, 3 parts of tantalum carbide powder, 1 part of lubricant and 1 part of adhesive according to the proportion of components by weight. And mix evenly, the mixing time is 1.5 hours, you can add grinding balls when mixing, and get a uniform mixture;

[0046] S2. Compression: use a powder molding machine to compress the mixture to obtain a green body with a certain density and strength;

[0047] S2', use the vacuum system to remove the mixture powder attached to the surface of the green body, and the vacuum system takes out the uncompacted powder on the surface of the green body, so as to prevent these powders from bubbling during the sintering process and make the surface of the sintered workpiece smoother ;

[0048] S3. Sintering: The pressed green body is p...

Embodiment 3

[0054] A preparation process of powder metallurgy parts, comprising the following steps:

[0055] S1. Mixing: Weigh 100 parts of iron powder, 3 parts of copper powder, 3 parts of manganese powder, 1 part of molybdenum powder, 4 parts of tantalum carbide powder, 2 parts of lubricant and 2 parts of adhesive according to the proportion of components by weight. And mix evenly, the mixing time is 1.5 hours, you can add grinding balls when mixing, and get a uniform mixture;

[0056] S2. Compression: use a powder molding machine to compress the mixture to obtain a green body with a certain density and strength;

[0057] S2', use the vacuum system to remove the mixture powder attached to the surface of the green body, and the vacuum system takes out the uncompacted powder on the surface of the green body, so as to prevent these powders from bubbling during the sintering process and make the surface of the sintered workpiece smoother ;

[0058] S3. Sintering: The pressed green body i...

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PUM

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Abstract

The invention relates to a preparation process of a powder metallurgy component. The preparation process comprises the following steps that, S1, materials are mixed, specifically, all required raw materials are weighed and taken according to needs, and a uniform mixture is obtained by using a mixing method; S2, pressing is carried out, specifically, the mixture is pressed for forming by using a powder forming machine, and a green body is obtained; S3, sintering is carried out, specifically, the pressed green body is placed in a material bearing frame, firstly the green body passes through a presintering area, then the green body passes through a sintering area and passes through a high-temperature section for alloying, finally the green body passes through a cooling area, wherein the cooling area adopts nitrogen protection, an outer layer is cooled through water circulation, and discharging is carried out after cooling is completed; S4, shaping stamping is carried out, specifically, workpieces after being cooled and discharged are arranged in alignment, and then fed into a shaping machine to undergo precise stamping shaping one by one; and S5, coating is carried out, specifically,a NiCrBSi coating is sprayed on the outer surface of each workpiece by using a thermal spraying method. By adopting the thermal spraying method, the NiCrBSi coating is sprayed on the outer surface ofeach workpiece, so that the surface layer of each workpiece is provided with a high-hardness layer, the surface of each workpiece is hard and has a higher anti-pressure ability and a higher wear resistance ability, and the service life of the workpieces is prolonged.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, more specifically, it relates to a preparation process of powder metallurgy parts. Background technique [0002] Powder metallurgy is a process technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. The powder metallurgy method has similarities with the production of ceramics, and both belong to the powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solve the problems of new materials and plays a pivotal role in the development of new materials. [0003] The surface hardness of the workpiece obtained by existing powder metallurgy is low, ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/10B22F3/16B22F3/24C22C38/16C22C38/12C22C38/04C22C33/02C23C4/06
CPCB22F3/1007B22F3/16B22F3/24C23C4/06C22C38/16C22C38/12C22C38/04C22C33/0228C22C33/0264B22F2003/166B22F2003/242B22F2998/10B22F2999/00B22F1/10B22F2201/013B22F2201/02B22F3/02
Inventor 童恒刚宦有强李峰
Owner 深圳市冠强粉末冶金制品有限公司