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Method for preparing multilayer composite stainless steel based on gel injection molding technology

A gel injection molding and multi-layer composite technology, which is applied in the field of multi-layer composite metal material forming and processing, can solve the problems of multiple inclusions, low material utilization rate, complex process, etc., and achieves low equipment condition requirements and material utilization rate. High, simple molding process effect

Inactive Publication Date: 2016-01-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The explosive welding-rolling composite method makes the composite interface wavy due to the action of the jet, and the output, productivity and yield are relatively low, the product quality is poor, and the dimensional accuracy is low
At the same time, due to a series of problems such as the storage of explosives, the selection of blasting sites, the treatment of noise, the protection of personal safety and the serious environmental pollution, this method is not easy to be popularized and used.
[0008] (2) The combined rolling method requires high reduction in the first pass of rolling, and requires the use of a large-tonnage press, which requires a large investment in equipment
Before processing, the joint surface between the two layers of metal needs to be cleaned, vacuumed, and quickly welded, and the process is complicated
[0009] (3) The casting-rolling technology content is high, and the process factors that need to be controlled include mold coating, casting temperature, mold speed, etc. The process is complex, and it is difficult to exclude impurities in the molten alloy during centrifugal casting of multi-layer alloys, and it is easy to form more inclusions thing
Large billet processing volume, low material utilization rate

Method used

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  • Method for preparing multilayer composite stainless steel based on gel injection molding technology
  • Method for preparing multilayer composite stainless steel based on gel injection molding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the first step, in parts by weight, 10 parts of hydroxyethyl methacrylate and 1 part of tetraethylene glycol diacrylate are mixed to form a mixture; 5 parts of The mixture, 1 part of polyethylene oxide, and 0.5 part of ammonium persulfate are fully mixed to form a monomer solution;

[0030] In the second step, in parts by weight, add 97 parts of 7Cr17 powder to 3 parts of the monomer solution prepared in the first step to make a 7Cr17 powder-monomer mixture; add 95 parts of 4Cr13 powder to 5 parts of the first step to prepare In the obtained monomer solution, make 4Cr13 powder-monomer mixture;

[0031] The third step is to pour the 7Cr17 powder-monomer mixture into the mold, heat it to 70°C, and keep it warm for 1 hour to make a 7Cr17 gel base; pour the 4Cr13 powder-monomer mixture into the mold on the surface of the 7Cr17 gel base, heat To 70 ℃, keep warm for 1 hour to make 4Cr13 / 7Cr17 double-layer gel blank;

[0032] The fourth step is to heat the 4Cr13 / 7Cr17 dou...

Embodiment 2

[0036] In the first step, in parts by weight, 20 parts of hydroxyethyl methacrylate and 1 part of tetraethylene glycol diacrylate are mixed to form a mixture; 10 parts of deionized water are added The mixture, 5 parts of polyethylene oxide, and 0.8 part of ammonium persulfate were fully mixed to form a monomer solution;

[0037] In the second step, in parts by weight, 97 parts of 3Cr13 powder are added to 3 parts of the monomer solution prepared in the first step to make a 3Cr13 powder-monomer mixture; 96 parts of 9Cr18 powder are added to 4 parts of the first step to prepare In the obtained monomer solution, make 9Cr18 powder-monomer mixture;

[0038] The third step is to pour the 3Cr13 powder-monomer mixture into the mold, heat it to 65°C, and keep it warm for 1.5 hours to make a 3Cr13 gel base; pour the 9Cr18 powder-monomer mixture onto the surface of the 3Cr13 gel base in the mold, heat 9Cr18 / 3Cr13 double-layer gel billet is made by heating at 65°C for 1.5 hours; pouring ...

Embodiment 3

[0043] In the first step, in parts by weight, 1 part of 40 parts of hydroxyethyl methacrylate is mixed with tetraethylene glycol diacrylate to form a mixture; 25 parts of The mixture, 17 parts of polyvinylpyrrolidone, and 1.5 parts of ammonium persulfate were fully mixed to form a monomer solution;

[0044] In the second step, in parts by weight, 95 parts of 9Cr18 powder are added to 5 parts of the monomer solution prepared in the first step to make a 9Cr18 powder-monomer mixture; 96 parts of 2Cr13 powder are added to 4 parts of the first step to prepare In the obtained monomer solution, 2Cr13 powder-monomer mixture was made; 95 parts of 7Cr17 powder were added to 5 parts of the monomer solution obtained in the first step to make 7Cr17 powder-monomer mixture; 97 parts of 3Cr13 powder were added 3 parts of the monomer solution prepared in the first step are made into a 3Cr13 powder-monomer mixture; 96 parts of 8Cr17 powder are added into 4 parts of the monomer solution prepared...

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Abstract

The invention discloses a method for preparing multi-layer composite stainless steel based on the gel-casting technology. According to the method, hydroxyethyl methylacrylate and triuret tetraethylene glycol double acrylate mixture, water-soluble polymer materials and ammonium persulfate are added to deionized water, a monomer solution is prepared; at least two kinds of stainless steel powder are respectively added to the monomer solution, and at least two kinds of stainless steel powder-monomer mixtures are prepared; one kind of stainless steel powder-monomer mixture is poured into a mould, and a stainless steel gel blank is prepared; the other kind of stainless steel powder-monomer mixture is poured into the surface of the gel blank in the mould, the stainless steel powder-monomer mixture is added sequentially layer by layer, and a multi-layer stainless steel green ware body is obtained after heating; a multi-layer stainless steel sintered blank is obtained after sintering. The multi-layer stainless steel green ware body is obtained through a gel-casting technology, the forming process is simple, the production is free of noise, and no pollution is generated to the environment. The obtained materials have good comprehensive mechanical performance.

Description

technical field [0001] The invention relates to the technical field of forming and processing multilayer composite metal materials, in particular to a method for preparing multilayer composite stainless steel based on gel injection molding technology. Background technique [0002] With the progress of society and the improvement of people's living standards, people's requirements for daily necessities are not limited to their functionality, and their requirements for aesthetic appearance, decoration, and impact on health are also increasing. Kitchen knives are one of the most commonly used daily necessities. Water, steam, salt, acid, etc. in the kitchen environment can easily cause corrosion of metal materials. Ordinary carbon steel kitchen knives will soon become rusty, which not only affects the appearance, but also rust Excessive intake can cause damage to the human liver. Due to its high hardness, wear resistance and excellent corrosion resistance, martensitic stainless...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22
Inventor 车晓舟
Owner SOUTH CHINA UNIV OF TECH