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Method for injection forming material by rustless steel powder

A powder injection molding and injection molding technology, applied in the direction of coating, can solve the problems of high compressive strength, high tensile strength, good impact toughness, etc., and achieve the effect of high compressive strength, high tensile strength and good impact toughness

Inactive Publication Date: 2011-07-27
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 object 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 injection molding stainless steel powder material produced by metal injection molding technology in the prior art, and to provide a The obtained stainless steel powder injection molding material has high density, high hardness, high tensile strength, good elongation, high compressive strength, and good impact toughness. The method of using stainless steel powder injection molding material

Method used

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  • Method for injection forming material by rustless steel powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment is used to illustrate the method of using stainless steel powder injection molding materials 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, and the content of stearic acid is 3% by weight. . The injection molding stainless steel powder raw material containing 3 wt% copper powder and 97 wt% stainless steel powder and the binder are mixed at a temperature of 170° C. at a weight ratio of 92:8 for 4 hours. The above mixture is placed in an injection molding machine and processed into blanks at 180°C, an injection pressure of 80 MPa, and a mo...

Embodiment 2

[0026] This embodiment is used to illustrate the method of using stainless steel powder injection molding materials 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, and the content of stearic acid is 4% by weight. %. The injection-molded stainless steel powder raw material containing 4% by weight of copper powder and 96% by weight of stainless steel powder and the binder were mixed at a temperature of 170° C. at a weight ratio of 92.8:7.2 for 4 hours. The above ingredients are placed in an injection molding machine and processed into blanks at 180°C, an injectio...

Embodiment 3

[0029] This embodiment is used to illustrate the method of using stainless steel powder injection molding materials provided by the present invention.

[0030] High-density polypropylene, paraffin wax, carnauba wax (Shanghai Hecai Chemical Industry, 1#), ethylene-vinyl acetate copolymer and stearic acid are mixed to prepare a binder. Based on the total amount of the binder, The content of propylene is 10% by weight, the content of paraffin wax is 16% by weight, the content of carnauba wax is 30% by weight, the content of ethylene-vinyl acetate copolymer is 40% by weight, and the content of stearic acid is 4% by weight. The injection molding stainless steel powder raw material containing 2% by weight of copper powder and 98% by weight of stainless steel powder and the binder are mixed at a temperature of 170° C. at a weight ratio of 92:8 for 4 hours. The above ingredients are placed in an injection molding machine and processed into blanks at 180°C, an injection pressure of 80 MPa...

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Abstract

The invention relates to a method of an injection molding material by using a stainless steel powder, which comprises the following steps: mixing uniformly the injection molding stainless steel powder raw material with the a binder, obtaining a blank through the injection molding, degreasing the obtained blank, then sintering the degreased blank under vacuum environment or under an inert gas atmosphere to obtain the injection molding stainless steel powder material, wherein the injection molding stainless steel powder material contains the 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 by using the stainless steel powder injection molding material which helps the obtained injection molding 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 method of using stainless steel powder injection molding materials. Background technique [0002] Injection molding is a molding method of injection and model, also known as injection molding. General injection molding is to heat and plasticize solid polymer materials, including pellets or powders, into a molten state, and inject them into the mold at high speed under high pressure to give the shape of the melt cavity. After cooling, heating, crosslinking or heat Press vulcanization to solidify the polymer, then open the mold and take out the product to complete the injection molding process. Powder injection molding is to uniformly mix powder and thermoplastic materials into a fluid substance with good flow properties. This fluid substance is injected into a mold at a certain temperature and pressure on an injection molding machine. [0003] The development of metal powder injection molding technology was relatively late, and it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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