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High hardness stainless steel feedstock and preparation method thereof, high hardness stainless steel blank and preparation method thereof

A stainless steel, high hardness technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor thermal stability, low degreasing efficiency, low hardness, etc., achieve high thermal stability, high degreasing efficiency, and improve hardness

Active Publication Date: 2020-06-05
DONGGUAN HUAJING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a high-hardness stainless steel feed material and a preparation method thereof, a high-hardness stainless steel body and a preparation method thereof for the problems of low hardness, poor thermal stability, and low degreasing efficiency of high-hardness stainless steel feed materials

Method used

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  • High hardness stainless steel feedstock and preparation method thereof, high hardness stainless steel blank and preparation method thereof
  • High hardness stainless steel feedstock and preparation method thereof, high hardness stainless steel blank and preparation method thereof
  • High hardness stainless steel feedstock and preparation method thereof, high hardness stainless steel blank and preparation method thereof

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preparation example Construction

[0044] see figure 1 , the preparation method of the high-hardness stainless steel feeding material of one embodiment, comprises the following steps:

[0045] S110, uniformly mixing the stainless steel powder and the molybdenum carbide powder, and performing heat treatment until the temperature is 190° C. to 200° C. to obtain a base material.

[0046] In one embodiment, the stainless steel powder and the molybdenum carbide powder are mixed by stirring in a kneader, and the stirring rate is 4r / min-6r / min.

[0047] Heat treatment of stainless steel powder and molybdenum carbide powder to 190°C to 200°C can remove the moisture in the base material.

[0048] In one embodiment, the time for mixing the stainless steel powder and the molybdenum carbide powder is 1 hour to 2 hours.

[0049] S120, uniformly mixing the base material and the molding agent to obtain a mixture.

[0050] In one embodiment, the forming agent is added into the heated base material and mixed until it becomes...

Embodiment 1

[0069] Weigh 4.4Kg of SUS316L stainless steel powder and 0.09Kg of molybdenum carbide powder into a kneader, heat to 200°C and mix for 1 hour to obtain the base material. During the mixing process, the speed of the kneader is set to 5r / min.

[0070] Among them, the particle size of molybdenum carbide is 80nm; when the temperature of the detection substrate is greater than 170°C, add 0.025Kg of No. 58 fully refined paraffin wax, 0.02Kg of ethylene-vinyl acetate copolymer, and 0.027Kg of polymethyl ether to the kneader. Methyl acrylate, 0.025Kg of polyethylene glycol and 0.38Kg of polyoxymethylene were mixed to a muddy mass, wherein the mixing process made the temperature 185°C, the mixing speed was 20r / min, and the mixing time was 30min, and then stop the mixing process. Heating the substrate and molding agent, and continuing to mix for 30 minutes to obtain a mixture; put the mixture into a twin-screw extruder for plasticization and extrusion, and then granulate in a granulator ...

Embodiment 2

[0073] Weigh 9.4Kg of SUS316L stainless steel powder and 0.1Kg of molybdenum carbide powder into a kneader and heat to 190 ° C for 2 hours to obtain the base material. The diameter is 10nm; when the temperature of the detection substrate is greater than 170°C, add 0.03Kg of No. 58 fully refined paraffin wax, 0.03Kg of ethylene-vinyl acetate copolymer, 0.03Kg of polymethyl methacrylate, 0.03 Kg of polyethylene glycol and 0.38Kg of polyoxymethylene are mixed to a muddy mass, wherein the mixing process makes the temperature 180°C, the mixing speed is 30r / min, and the mixing time is 60min, and then stop the mixing of the substrate and the forming agent. Heat and continue mixing for 20 minutes to obtain a mixture; put the mixture into a twin-screw extruder for plasticization and extrusion, and then granulate in a granulator to obtain a high-hardness stainless steel feed.

[0074] The product mold is selected and installed in the injection molding equipment, and the high-hardness st...

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Abstract

The invention relates to a high-hardness stainless steel feeding material and a preparation method thereof, a high-hardness stainless steel body and a preparation method thereof. A high-hardness stainless steel feed material, including a base material and a molding agent; the base material includes 98 to 99 parts by mass of stainless steel powder and 1 to 2 parts of molybdenum carbide powder; The number of parts includes: 4 to 6 parts of paraffin; 4 to 6 parts of ethylene-vinyl acetate copolymer; 4 to 6 parts of polymethyl methacrylate; 4 to 6 parts of polyethylene glycol; and polyoxymethylene 76 to 88 copies. The above-mentioned high-hardness stainless steel feed and high-hardness stainless steel body can maintain the excellent corrosion resistance and polishing performance of the product, while improving the hardness of the material, so that the stainless steel product is not easy to deform; The combination of methyl acrylate, polyethylene glycol and polyoxymethylene makes the high-hardness stainless steel-based feed material have good plasticizing performance and toughness, high thermal stability and high degreasing efficiency.

Description

technical field [0001] The invention relates to the technical field of metal powder injection molding, in particular to a high-hardness stainless steel feed material and a preparation method thereof, a high-hardness stainless steel body and a preparation method thereof. Background technique [0002] Metal powder injection molding is a near-net-shaping technology combining traditional powder metallurgy technology and plastic injection molding technology. It is suitable for mass production of small and complex-shaped parts, and it better solves the problem of high production costs of metal parts. With the improvement of MIM technology, the bulk density of metal alloys has been improved, and the use of new binders has also reduced shrinkage, and problems such as size, accuracy, and density have been resolved. SUS316L stainless steel is widely used in the IT electronics industry due to its good corrosion resistance and polishing effect. However, the SUS316L stainless steel mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/22C22C38/44C22C38/58C22C38/04C22C38/02
CPCC22C38/02C22C38/04C22C38/44C22C38/58B22F3/225B22F1/108B22F1/103
Inventor 张伟明庞前列张柯
Owner DONGGUAN HUAJING POWDER METALLURGY
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