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Sintering process for strengthening SUS316L stainless steel material

A technology of stainless steel and process, which is applied in the field of sintering process of strengthening SUS316L stainless steel material, can solve the problem of low hardness of SUS316L stainless steel, achieve the effect of uniform material, strong hardness and enhanced fluidity

Inactive Publication Date: 2019-11-15
SHENZHEN SHINDY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a sintering process for strengthening SUS316L stainless steel material, which solves the problem of low hardness of the SUS316L stainless steel produced by the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of sintering process for strengthening the SUS316L stainless steel material of the present embodiment comprises the following steps:

[0028] S1. First take 9 parts of polypropylene and 20 parts of low-density polyethylene and put them into an internal mixer for thorough mixing, then add 1 part of stearic acid and 70 parts of paraffin wax to continue mixing, and after fully mixing, add 500 parts of 316L of powder mixture was kneaded for 60 minutes at 145°C to obtain block mixture;

[0029] Wherein, the regular 316L powder and the irregular 316L powder are mixed according to the ratio of 6:4, and the obtained is the 316L powder mixture;

[0030] S2. Cool the block mixture obtained by kneading in S1, and crush it with a pulverizer after cooling to prepare powder;

[0031] S3, making the powder prepared in S2 into a sample blank through a process of feed injection molding, wherein, before performing injection molding, the mold is preheated to 100°C;

[0032] S4, d...

Embodiment 2

[0043] A kind of sintering process for strengthening the SUS316L stainless steel material of the present embodiment comprises the following steps:

[0044] S1. First take 9 parts of polypropylene and 20 parts of low-density polyethylene and put them into an internal mixer for thorough mixing, then add 1 part of stearic acid and 70 parts of paraffin wax to continue mixing, and after fully mixing, add 500 parts of 316L of powder mixture was kneaded for 55 minutes at 140°C to obtain block mixture;

[0045] Wherein, the regular 316L powder and the irregular 316L powder are mixed according to the ratio of 6:4, and the obtained is the 316L powder mixture;

[0046] S2. Cool the block mixture obtained by kneading in S1, and crush it with a pulverizer after cooling to prepare powder;

[0047] S3. Making the powder prepared in S2 into a sample blank through a process of feed injection molding, wherein, before performing injection molding, the mold is preheated to 120° C.;

[0048] S4,...

Embodiment 3

[0059] A kind of sintering process for strengthening the SUS316L stainless steel material of the present embodiment comprises the following steps:

[0060] S1. First take 9 parts of polypropylene and 20 parts of low-density polyethylene and put them into an internal mixer for thorough mixing, then add 1 part of stearic acid and 70 parts of paraffin to it and continue mixing. After fully mixing, add 600 parts of 316L of powder mixture was kneaded for 65 minutes at 142°C to obtain block mixture;

[0061] Wherein, the regular 316L powder and the irregular 316L powder are mixed according to the ratio of 6:4, and the obtained is the 316L powder mixture;

[0062] S2. Cool the block mixture obtained by kneading in S1, and crush it with a pulverizer after cooling to prepare powder;

[0063] S3. Making the powder obtained in S2 into a sample blank through a process of feed injection molding, wherein, before performing injection molding, the mold is preheated to 110° C.;

[0064] S4, ...

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Abstract

The invention relates to the technical field of stainless steel sintering, and provides a sintering process for strengthening an SUS316L stainless steel material. Polypropylene, low-density polyethylene, stearic acid and paraffin of binders are mixed according to the ratio being 9:20:1:70, in the mixing process, the binders are sequentially added into an internal mixer for mixing according to thetemperatures of the melting points from high to low, and the binders can be sequentially mixed; and finally powder of the binders are mixed more uniformly, so that the action of the binders is maximized. Raw materials of the stainless steel are 316L powder mixtures which are obtained by mixing regular 316L powder and irregular 316L powder according to the ratio being 6:4, so that the hardness of the sintered stainless steel is made stronger; and the stainless steel is subjected to nitriding and partial pressure in the sintering process, as high-strength nitride can be generated by a reaction of nitrogen and elements such as Cr, the strength of the sintered stainless steel can be strengthened.

Description

technical field [0001] The invention relates to the technical field of stainless steel sintering, in particular to a sintering process for strengthening SUS316L stainless steel materials. Background technique [0002] SUS316L stainless steel is an important corrosion-resistant material. It has good crystal corrosion resistance, high temperature resistance, easy processing, and high strength. Mo is added to 316L stainless steel, so its corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good, and it can be used under harsh conditions. 316L stainless steel belongs to austenitic stainless steel, which has good strength, plasticity, toughness, cold formability and good low temperature performance. Due to the addition of 2% Mo on the basis of Cr18Ni8, it endows the steel with good reduction resistance and corrosion resistance. It has suitable corrosion resistance in various organic acids, inorganic acids, alkalis, salts and seaw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/22B22F3/10B22F3/15
CPCB22F3/225B22F3/1021B22F3/15B22F1/103B22F1/10
Inventor 李继坪张世荣吴晓燕
Owner SHENZHEN SHINDY TECH
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