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A mim316 sintering process

A technology, argon gas technology, applied in the field of MIM316 sintering technology, can solve problems such as bruises and easy scratches on the product surface, achieve the effects of improving the degree of compactness, solving the problem of low sintering hardness and wide sintering range

Active Publication Date: 2022-07-22
东莞市华研新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, vacuum furnace sintered MIM316L products have low austenite hardness, and the general hardness is below 180HV. Under normal circumstances, the general hardness is only 110-140HV. Due to the current status of the MIM industry, the high-demand surface polished MIM parts are currently only 316 materials. It can meet the requirements of nearly full and dense polishing, but the low hardness makes the surface of the product easy to scratch, bruise and other defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A MIM316 sintering process includes the following steps: firstly, vacuum sintering is performed; then low-pressure argon gas is charged for sintering, and sintered to the surface layer of the product to form a dense layer; then high-pressure nitrogen is charged, and auxiliary pressure is applied during sintering to make the product further Densified and cooled with argon.

[0036] In the step of sintering with low pressure argon gas and sintering to the surface layer of the product to form a dense layer, the pressure of the argon gas is 10Kpa.

[0037] In the step of sintering with low pressure argon gas and sintering until the surface layer of the product forms a dense layer, the sintering temperature is 1350°C.

[0038] In the step of sintering with low pressure argon gas and sintering until the surface layer of the product forms a dense layer, the sintering time is 60 minutes.

[0039] In the step of then filling with high-pressure nitrogen, applying auxiliary press...

Embodiment 2

[0046] A MIM316 sintering process includes the following steps: firstly, vacuum sintering is performed; then low-pressure argon gas is charged for sintering, and sintered to the surface layer of the product to form a dense layer; then high-pressure nitrogen is charged, and auxiliary pressure is applied during sintering to make the product further Densified and cooled with argon.

[0047] The difference from Example 1 is that in the step of sintering with low-pressure argon gas and sintering to the surface layer of the product to form a dense layer, the pressure of the argon gas is 20Kpa.

[0048] The difference from Example 1 is that in the step of sintering with low pressure argon gas and sintering until the surface layer of the product forms a dense layer, the sintering temperature is 1365°C.

[0049] The difference from Example 1 is that in the step of sintering with low-pressure argon gas and sintering until the surface layer of the product forms a dense layer, the sinteri...

Embodiment 3

[0057] A MIM316 sintering process includes the following steps: firstly, vacuum sintering is performed; then low-pressure argon gas is charged for sintering, and sintered to the surface layer of the product to form a dense layer; Densified and cooled with argon.

[0058] The difference from Example 1 is that in the step of sintering with low-pressure argon gas and sintering to the surface layer of the product to form a dense layer, the pressure of the argon gas is 40Kpa.

[0059] The difference from Example 1 is that in the step of sintering with low-pressure argon gas and sintering until the surface layer of the product forms a dense layer, the sintering temperature is 1385°C.

[0060] The difference from Example 1 is that in the step of sintering with low-pressure argon gas and sintering until the surface layer of the product forms a dense layer, the sintering time is 180 min.

[0061] The difference from Example 1 is that in the step of then filling with high pressure nitr...

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Abstract

The invention relates to the technical field of sintering, in particular to a MIM316 sintering process, which comprises the following steps: first, vacuum sintering; then low-pressure argon gas is charged for sintering, and sintered to the surface layer of the product to form a dense layer; Auxiliary pressure is applied to further densify the product under pressure and argon is used to cool down. The invention improves the densification degree of powder metallurgy sintering, and simultaneously solves the industry problem that the sintering hardness of austenitic stainless steel is too low.

Description

technical field [0001] The invention relates to the technical field of sintering, in particular to a MIM316 sintering process. Background technique [0002] At present, vacuum furnace sintered MIM316L products have low austenite hardness, and the general hardness is below 180HV. Under normal circumstances, the general hardness is only 110-140HV. Subject to the current status of the MIM industry, the surface polishing MIM parts with high requirements are currently only 316 material. It can meet the requirements of nearly full dense polishing, but the low hardness makes the surface of the product prone to scratches, bumps and other defects. SUMMARY OF THE INVENTION [0003] In order to solve the above technical problems, the present invention provides a MIM316 sintering process, which can effectively improve the sintering hardness of austenitic stainless steel. [0004] The present invention adopts following technical scheme: [0005] A MIM316 sintering process, comprising...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/10B22F3/14B22F3/15
CPCB22F3/1007B22F3/14B22F3/15
Inventor 刘荣徐旭辉
Owner 东莞市华研新材料科技有限公司
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