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Powder metallurgy sintering method of non-magnetic steel structural component

A technology of powder metallurgy and sintering method, which is applied in the field of powder metallurgy, can solve the problems of large size change, large product size tolerance, and large change fluctuation, and achieve the effects of reducing size change, controllable production process, and improving product quality

Inactive Publication Date: 2017-01-11
GUANGDONG YUEHAI HUAJIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally, the structural parts manufactured by powder metallurgy have small dimensional changes during the sintering process, generally within 3 to 5 per thousand, but the non-magnetic steel structural parts manufactured by powder metallurgy liquid phase sintering have dimensional changes during the sintering process. Large, the linear shrinkage rate reaches 2-3%, and the change fluctuates greatly, which makes it difficult to control the size of the non-magnetic steel mechanism components, and the product size tolerance is large, which can not give full play to the high precision of powder metallurgy parts only by pressing and sintering Advantages, can not meet the requirements of industrial applications

Method used

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  • Powder metallurgy sintering method of non-magnetic steel structural component

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Experimental program
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Effect test

Embodiment 1

[0026] A powder metallurgy sintering method of a non-magnetic steel balance weight in this embodiment comprises the following steps:

[0027] (1) According to the conventional method of powder metallurgy, the green body of non-magnetic steel balance weight is made; the green body has through holes, and the green body density is 5.8g / cm 3 ;

[0028] (2) Take out the tray of the powder metallurgy high-temperature sintering furnace, and lay a layer of corundum sand on the bottom of the tray to form a sand cushion layer; the particle size of the corundum sand is 80 mesh, and the thickness of the sand cushion layer is 1mm;

[0029] (3) placing the green body on the cushion sand layer, and then continue to fill the above-mentioned corundum sand in the through hole;

[0030] (4) Push the tray into a powder metallurgy high-temperature sintering furnace, and sinter at a temperature of 1180°C for 1.5h;

[0031] (5) After the sintering is completed, take it out, and carry out the follo...

Embodiment 2

[0033] A powder metallurgy sintering method of a non-magnetic steel balance weight in this embodiment comprises the following steps:

[0034] (1) According to the conventional method of powder metallurgy, the green body of non-magnetic steel balance weight is made; the green body has through holes, and the green body density is 6.2g / cm 3 ;

[0035] (2) Take out the tray of the powder metallurgy high-temperature sintering furnace, and lay a layer of corundum sand on the bottom of the tray to form a sand cushion; the particle size of the corundum sand is 120 mesh, and the thickness of the sand cushion is 1.5mm;

[0036] (3) placing the green body on the cushion sand layer, and then continue to fill the above-mentioned corundum sand in the through hole;

[0037] (4) Push the tray into a powder metallurgy high-temperature sintering furnace, and sinter at a temperature of 1175°C for 1.8 hours;

[0038] (5) Take it out after sintering is completed, and carry out follow-up polishin...

Embodiment 3

[0040] A powder metallurgy sintering method of a non-magnetic steel balance weight in this embodiment comprises the following steps:

[0041] (1) According to the conventional method of powder metallurgy, the green body of non-magnetic steel balance weight is made; the green body has through holes, and the green body density is 6.4g / cm 3 ;

[0042] (2) Take out the tray of the powder metallurgy high-temperature sintering furnace, and lay a layer of corundum sand on the bottom of the tray to form a sand cushion; the particle size of the corundum sand is 150 mesh, and the thickness of the sand cushion is 2mm;

[0043] (3) placing the green body on the cushion sand layer, and then continue to fill the above-mentioned corundum sand in the through hole;

[0044] (4) Push the tray into a powder metallurgy high-temperature sintering furnace, and sinter at a temperature of 1175°C for 2 hours;

[0045] (5) Take it out after the sintering is completed, and carry out follow-up polishin...

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Abstract

The invention relates to a powder metallurgy sintering method of a non-magnetic steel structural component. A powder metallurgy sintering device is adopted for carrying out sintering. The powder metallurgy sintering method comprises the following steps that a green body of the non-magnetic steel structural component is obtained; the powder metallurgy sintering device is provided with a tray used for containing the green body, and sand is laid at the bottom of the tray so as to form a placing sand layer; and the green body is placed on the placing sand layer to be sintered, and the non-magnetic steel structural component is obtained. According to the powder metallurgy sintering method, size changes generated before and after non-magnetic steel structural component sintering can be reduced, and the tolerance of the non-magnetic steel structural component can meet the market requirement.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a powder metallurgy sintering method for non-magnetic steel structural parts. Background technique [0002] The use of non-magnetic steel structural parts is very extensive, and non-magnetic steel structural parts are required in automatic control systems, precision instruments, telecommunications and motors, as well as in many military fields. [0003] At present, non-magnetic steel structural parts are mainly manufactured by powder metallurgy technology. Powder metallurgy technology is a process technology for producing metal or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, after forming and sintering, to manufacture metal materials, composite materials and various types of products. [0004] Generally, the structural parts manufactured by powder metallurgy have small dimensional changes during the sintering process, generall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10C22C38/04C22C38/16C22C38/02C22C38/60
CPCB22F3/10B22F3/1035B22F2003/1042C22C38/02C22C38/04C22C38/16C22C38/60
Inventor 吴苑标潘永汉刘军陈家坚朱权利
Owner GUANGDONG YUEHAI HUAJIN TECH CO LTD
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