Hard alloy sintered antisticking coating

A technology of anti-adhesive coating and hard alloy, which is applied in the direction of coating, etc., can solve the problems of sticking and other problems, and achieve the effects of good anti-adhesion and isolation, reasonable and scientific formula, high chemical stability and thermal stability

Active Publication Date: 2015-04-01
GUANGXI WUZHOU GANGDE HARD ALLOY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a cemented carbide sintering anti-adhesive coating, which has the advantages of simple manufacture, high temperature resistance, good adhesion to graphite boats, and environmental protection, and can make the bonding phases such as nickel and cobalt in cemented carbide and Graphite boats are separated from each other to solve the problems of boat sticking and carburization that cannot be completely solved by current coatings and anti-sticking methods, and improve the first-time success rate of high-binder phase cemented carbide sintering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Tween 2% Alumina or Zirconia 5%

[0033] Titanium carbide 10% flake graphite powder 5%

[0034] Methylcellulose 0.3% Polyethylene glycol 0.5%

[0035] The rest is deionized water.

[0036] Mix Tween with polyethylene glycol and stir evenly to obtain solution A;

[0037] Slowly add water to the methyl cellulose, stir while adding, and keep stirring until it becomes a uniform colloidal solution to prepare solution B;

[0038] Put alumina or zirconia, titanium carbide, and graphite powder into a ball mill for mixing and pulverization until the particle size is 0.08-0.2 mm to obtain material C;

[0039] Mix solution A and solution B evenly, slowly add to material C, stir while adding, keep stirring until evenly mixed, and obtain cemented carbide sintered anti-stick coating.

Embodiment 2

[0041] Tween 6% Alumina or Zirconia 20%

[0042] Titanium carbide 25% Flake graphite powder 20%

[0043] Methylcellulose 2% Polyethylene Glycol 3%

[0044] The rest is deionized water.

[0045] Mix Tween with polyethylene glycol and stir evenly to obtain solution A;

[0046] Slowly add water to the methyl cellulose, stir while adding, and keep stirring until it becomes a uniform colloidal solution to prepare solution B;

[0047] Put alumina or zirconia, titanium carbide, and flake graphite powder into a ball mill for mixing and pulverization until the particle size is 0.08~0.2mm to obtain material C;

[0048] Mix solution A and solution B evenly, slowly add to material C, stir while adding, keep stirring until evenly mixed, and obtain cemented carbide sintered anti-stick coating.

Embodiment 3

[0050] Tween 3% Alumina or Zirconia 15%

[0051] Titanium carbide 20% Flake graphite powder 10%

[0052] Methylcellulose 0.8% Polyethylene glycol 2%

[0053] The rest is deionized water.

[0054] Mix Tween with polyethylene glycol and stir evenly to obtain solution A;

[0055] Slowly add water to the methyl cellulose, stir while adding, and keep stirring until it becomes a uniform colloidal solution to prepare solution B;

[0056] Put aluminum oxide or zirconium oxide, titanium carbide, and phosphorus flake graphite powder into a ball mill for mixing and pulverization until the particle size is 0.08-0.2 mm to obtain material C;

[0057] Mix solution A and solution B evenly, slowly add to material C, stir while adding, keep stirring until evenly mixed, and then obtain cemented carbide sintered anti-sticking coating.

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PUM

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Abstract

The invention aims to provide a hard alloy sintered antisticking coating which is mainly prepared from tween, aluminium oxide powder or zirconium oxide powder, titanium carbide, graphite powder, methylcellulose, polyethylene glycol and the rest of water. The hard alloy sintered antisticking coating is rational and scientific in formula and has the advantages of simplicity in preparation, high-temperature resistance, high attachment to a graphite boat, environment friendliness and the like; sticky phases such as nickel and cobalt in a hard alloy are separated from the graphite boat; the problem of sticky boat and carbon penetration which cannot be completely solved by the existing coating and antisticking method is solved; the one-time success rate of sintering the large sticky phase hard alloy product is increased; and the hard alloy sintered antisticking coating is outstanding in performance and has prominent practical characteristics and obvious advancement.

Description

technical field [0001] The invention relates to a coating for cemented carbide sintering, in particular to a coating for anti-sticking of cemented carbide sintering. Background technique [0002] Due to the high content of cobalt and nickel in the binder phase, the cemented carbide has good wettability with graphite. Therefore, when the binder phase changes to a liquid phase at the sintering temperature, the binder phase and carbon will occur. The interdiffusion and migration process between the sintered alloy and the graphite boat will cause the sintered product to bond to the graphite boat, and at the same time, the bottom alloy in contact with the boat will be carburized, which will deform the contact layer of the sintered alloy and the final alloy The performance is unqualified, resulting in a low pass rate of sintered products. [0003] At present, there are mainly two anti-adhesive methods for sintering cemented carbide with high bonding phase: anti-adhesive coating t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/12
Inventor 陈德勇吴立雄谢汉雄叶剑锋欧锦超何瑞明韦国华邓智勇李接林甘兴帮陈烽石展飞潘金凤
Owner GUANGXI WUZHOU GANGDE HARD ALLOY MFG
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