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Preparation method of corrosion-resistant SUS420 material

A corrosion-resistant, 2wt%-4wt% technology, used in metal processing equipment, transportation and packaging, etc., can solve problems such as poor corrosion resistance, deterioration of corrosion resistance, product failure, etc., to achieve the effect of improving corrosion resistance

Pending Publication Date: 2022-05-10
ANHUI HAOFANG ELECTROMECHANICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the MIM process is rapidly promoted and matured in China, especially for the production of small and precise products, such as mobile phone card holders, charger type-c interfaces, etc., and the raw materials with the largest amount are 316 and 17-4ph series with low hardness and high corrosion resistance. With the development of MIM technology, the application types of raw materials are rapidly expanding, and high-hardness materials such as sus420 and sus440 are also added to it, but such materials are prone to poor corrosion resistance due to high carbon content, and the sintered sus420 material The salt spray performance of the product under the neutral salt spray test condition is usually less than 12h, and the corrosion resistance of sus440 is even worse, which causes great troubles for subsequent processing and easily causes product failure

Method used

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  • Preparation method of corrosion-resistant SUS420 material
  • Preparation method of corrosion-resistant SUS420 material
  • Preparation method of corrosion-resistant SUS420 material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: A kind of preparation method of corrosion-resistant SUS420 material, comprises the following steps: the selection of metal additive powder: MIM uses gas atomization or water atomization high-carbon alloy powder SUS420 material element composition is: carbon (C) accounts for 0.16-0.25% of the total weight of the metal powder; Manganese (Mn) ≤ 1.00% of the total weight of the metal powder; Silicon (Si) ≤ 1.00% of the total weight of the metal powder; Chromium (Cr) 12.0- 14.0%; Nickel (Ni) accounts for ≤0.75% of the total weight of the metal powder; phosphorus (P) accounts for 0.04% of the total weight of the metal powder; sulfur (S) accounts for ≤0.03% of the total weight of the metal powder; the rest of the metal powder is Fe . The elemental powder of metal chromium is selected, and the particle size D50 of the powder is 1.58 μm.

[0025] V mixing: When the carbon content of the high-carbon alloy powder SUS420 matrix metal powder used for MIM is 0.45%, add...

Embodiment 2

[0028] Embodiment 2: The similarities between this embodiment and Embodiment 1 will not be repeated. The difference lies in: according to the preparation method in Embodiment 1, the sintering temperature is 1290°C.

Embodiment 3

[0029] Embodiment 3: The similarities between this embodiment and Embodiment 1 will not be repeated, and the difference is: according to the preparation method in Embodiment 1, the sintering temperature is 1300°C.

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Abstract

The invention relates to a preparation method of a corrosion-resistant SUS420 material, which comprises the following steps: adding 2-4wt% of metal chromium powder into MIM gas atomized or water atomized high-carbon alloy powder SUS420 matrix with the powder carbon content of 0.65%, and the particle size D50 of the metal chromium powder is 0.1-3 [mu] m; fully and uniformly mixing in a V mixer to obtain mixed alloy powder; and mixing the mixed alloy powder with a binder, and then carrying out banburying, granulation, injection molding, degreasing and sintering to obtain a sintered blank of the corrosion-resistant SUS420 material.

Description

technical field [0001] The invention relates to the technical field of metal powder injection molding (MIM), in particular to a method for preparing a corrosion-resistant SUS420 material for metal powder injection molding. Background technique [0002] Metal injection molding technology is the product of multidisciplinary penetration and intersection of plastic molding technology, polymer chemistry, powder metallurgy technology and metal materials. MIM technology overcomes the low density, uneven material and low mechanical properties of traditional powder metallurgy products. , It is not easy to form thin-walled complex shortcomings, suitable for mass production of complex, high-precision, high-performance small metal parts. [0003] At present, the MIM process is rapidly promoted and matured in China, especially for the production of small and precise products, such as mobile phone card holders, charger type-c interfaces, etc., and the raw materials with the largest amount...

Claims

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Application Information

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IPC IPC(8): B22F1/103B22F3/22B22F3/10B22F3/24C21D1/18C22C38/40C22C38/18C22C38/04C22C38/02C22C33/02
CPCB22F3/225B22F3/1025B22F3/24C21D1/18C22C38/40C22C38/18C22C38/04C22C38/02C22C33/0207B22F2003/248
Inventor 杨勇杜朝晖
Owner ANHUI HAOFANG ELECTROMECHANICS
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