Hard alloy adhesive

A cemented carbide and binder technology, applied in the field of powder metallurgy, can solve the problems of poor resistance to environmental stress cracking, cracks, and poor compatibility, and achieve strong resistance to environmental stress cracking, excellent wettability, and compatibility. Good results

Inactive Publication Date: 2016-06-08
LIUZHOU ANLONG MACHINERY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a cemented carbide binder, which can solve the problem of poor compatibility between the existing binder and metal powder, and the feeding material mixed with metal powder is injected to form a blank. Poor resistance to environmental stress cracking, prone to cracks during solvent degreasing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A cemented carbide binder consisting of the following raw materials: 600 kg of solid paraffin, 50 kg of liquid paraffin, 100 kg of high-density polyethylene, 80 kg of polypropylene, 50 kg of dioctyl phthalate, ethylene-propylene copolymer 40 kilograms of food, 50 kilograms of stearic acid.

[0016] Weigh each raw material according to the above weight, put solid paraffin, high-density polyethylene, polypropylene, and stearic acid into the reaction kettle, heat it to 170°C-180°C, add ethylene-propylene copolymer for stirring, and then add phthalate Stir dioctyl formate, then add liquid paraffin and continue stirring; after the raw materials in the reaction kettle are completely dissolved, leave it for 8 hours to obtain the cemented carbide binder.

[0017] The invention has good compatibility with metal powder and excellent wettability, and the feeding material made by mixing the binder and metal powder has strong resistance to environmental stress cracking and can avoid...

Embodiment 2

[0019] A cemented carbide binder consisting of the following raw materials: 650 kg of solid paraffin, 80 kg of liquid paraffin, 150 kg of high-density polyethylene, 120 kg of polypropylene, 80 kg of dioctyl phthalate, ethylene-propylene copolymer 90 kilograms of food, 100 kilograms of stearic acid.

[0020] Weigh each raw material according to the above weight, put solid paraffin, high-density polyethylene, polypropylene, and stearic acid into the reaction kettle, heat it to 170°C-180°C, add ethylene-propylene copolymer for stirring, and then add phthalate Dioctyl formate was stirred, and then liquid paraffin was added to continue stirring; after the raw materials in the reaction kettle were completely dissolved, the cemented carbide binder was obtained by standing for 10 hours.

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Abstract

The invention discloses a hard alloy adhesive and relates to the field of the powder metallurgy technology. The hard alloy adhesive comprises, by weight, 60-65 parts of solid paraffin, 5-8 parts of liquid paraffin, 10-15 parts of high density polyethylene, 8-12 parts of polypropylene, 5-8 parts of dioctyl phthalate and 5-10 parts of stearic acid. Compared with the prior art, compatibility between the hard alloy adhesive and metal powder is good, environmental stress cracking resisting capacity of a blank formed by injection of feed formed by mixing the adhesive and the metal powder is high, and cracks are prevented from being generated in the solvent degreasing process.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a binder for cemented carbide injection molding. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy, and is widely used as tool materials. Cemented carbide injection molding technology is to make metal powder and binder into a feed material with certain rheology at a certain temperature through a mixing process, inject it into a mold cavity on an injection machine to form a blank, and then sinter the blank after solvent degreasing treatment. The currently used binder has good fluidity, strength and shape retention, but has poor compatibility with metal powder. The binder is mixed with metal powder to form a feed that is injected to form a blank that is resistant to environmental stress cracking. Poor ability, prone to cracks during solvent degreasing. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L23/06C08L23/12C08K5/12C08K5/09B22F1/00B22F3/22C22C1/05
CPCC22C1/05C08L91/06B22F3/225C08L2205/035C08L2205/025C08L2207/062B22F1/103B22F1/10C08L23/06C08L23/12C08K5/12C08K5/09
Inventor 唐振荣
Owner LIUZHOU ANLONG MACHINERY EQUIP
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