Preparation method of cermet material

A technology of cermets and raw materials, applied in the direction of coating, etc., can solve the problems of poor tensile strength, elongation, compressive strength and impact toughness, high tensile strength, high density, etc., and achieve good elongation and high tensile strength , the effect of high density

Active Publication Date: 2009-06-03
靖江市华信科技创业园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of poor density, hardness, tensile strength, elongation, compressive strength and impact toughness of the stainless steel powder cermet material produced by metal injection molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0008] The invention provides a method for preparing a cermet material. The method comprises uniformly mixing a cermet raw material with a binder, injecting molding to obtain a blank, degreasing the obtained blank, and then degreasing the blank in a vacuum environment or an inert gas atmosphere. The degreased blank is sintered to obtain a cermet material, the cermet raw material contains stainless steel powder and copper powder; the binder contains paraffin wax, ethylene-vinyl acetate copolymer, high-density polyethylene, carnauba wax and hard Fatty acid.

[0009] The cermet raw material contains stainless steel powder and copper powder, wherein the particle size of the stainless steel powder and copper powder can be selected according to actual needs, and the finer the particle, the easier it is to form and sinter. The particle size of the stainless steel powder is preferably less than 20 microns, more preferably 15-20 microns; the particle size of the copper powder is prefer...

Embodiment 1

[0023] This example is used to illustrate the preparation method of the cermet material provided by the present invention.

[0024] Mix ethylene-vinyl acetate copolymer, paraffin wax, carnauba wax (Shanghai Hecai Chemical Industry, 1#), high-density polypropylene and stearic acid to prepare a binder. Based on the total amount of the binder, ethylene - The content of vinyl acetate copolymer is 40% by weight, the content of paraffin wax is 10% by weight, the content of carnauba wax is 38% by weight, the content of high density polypropylene is 19% by weight, the content of stearic acid is 3% by weight . The cermet raw material containing 3 wt % copper powder and 97 wt % stainless steel powder and the binder were mixed at a temperature of 170° C. for 4 hours at a weight ratio of 92:8. The above mixture was placed in an injection molding machine, and processed into a blank under the conditions of 180° C., injection pressure of 80 MPa, and mold temperature of 40° C. Put the blank...

Embodiment 2

[0026] This example is used to illustrate the preparation method of the cermet material provided by the present invention.

[0027]Mix ethylene-vinyl acetate copolymer, paraffin wax, carnauba wax (Shanghai Hecai Chemical Industry, 1#), high-density polypropylene and stearic acid to prepare a binder. Based on the total amount of the binder, ethylene - The content of vinyl acetate copolymer is 34% by weight, the content of paraffin wax is 12% by weight, the content of carnauba wax is 40% by weight, the content of high density polypropylene is 20% by weight, the content of stearic acid is 4% by weight %. The cermet raw material containing 4 wt % copper powder and 96 wt % stainless steel powder and the binder were mixed at a temperature of 170° C. for 4 hours at a weight ratio of 92.8:7.2. The above-mentioned ingredients are placed in the injection molding machine, and processed into a blank under the conditions of 180° C., injection pressure 80 MPa, and mold temperature 40° C. ...

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Abstract

The invention relates to a preparation method of a cermet material. The method comprises the following steps: raw cermet materials are evenly blended with a binder and are injected for molding to obtain a blank, the obtained blank is degreased, the degreased blank is sintered in vacuum environment or under an inert gas atmosphere to obtain the cermet material, wherein, the raw cermet materials contain stainless steel powder and copper powder; the binder contains paraffin wax, ethylene-vinyl acetate copolymer, high-density polypropylene, carnauba wax and stearic acid. The invention provides the preparation method which help the obtained cermet material have high density, high hardness, high tensile strength, good extensibility, high compressive strength and good impact toughness.

Description

technical field [0001] The invention relates to a preparation method of a cermet material. Background technique [0002] Injection molding is an injection and model molding method, also known as injection molding. General injection molding is to heat and plasticize solid polymer materials, including pellets or powder, into a molten state. Press vulcanization to solidify the polymer, then open the mold and take out the product, which completes an injection molding process. Powder injection molding is to uniformly mix powder and thermoplastic materials to make a fluid substance with good flow properties, and inject this fluid substance into the mold on the injection molding machine under a certain temperature and pressure. [0003] The development of metal powder injection molding technology was relatively late, and it was not until 1979 that it attracted the attention of the powder metallurgy industry. Although there have been some reports on metal powder injection molding...

Claims

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Application Information

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IPC IPC(8): C22C1/05B22F3/00B29C45/00
Inventor 桑淑华郭忠臣向其军陈福平刘慧强
Owner 靖江市华信科技创业园有限公司
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