Preparation method of stainless steel
A stainless steel, atomized powder making technology, applied in the direction of metal processing equipment, furnace types, furnaces, etc., can solve the problems of increased magnetic permeability of products, reduced nitrogen solid solution, and insufficient elements for forming iron in Worth field, etc., to achieve practical Strong, easy-to-operate effect
Active Publication Date: 2020-07-31
CHAMP TECH OPTICAL FOSHAN
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Problems solved by technology
However, the melting point of manganese is 1241-1247°C. When the sintering temperature of stainless steel is frequently 1300°C, the manganese in the alloy is easily burnt, resulting in insufficient manganese.
Since manganese will increase the solid solution of nitrogen in stainless steel, when manganese is burned out, the solid solution of nitrogen will be reduced, which will eventually result in insufficient elements for the formation of ferrite, which will increase the magnetic permeability of the product
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[0013] In order to make the purpose, technical solution and beneficial technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
[0014] see figure 1 , the embodiment of the present invention provides a method for preparing stainless steel, which mainly includes steps S1-S5.
[0015] In step S1, the metal material is smelted and atomized to powder to obtain a first alloy powder.
[0016] Among them, there are many kinds of metal materials for smelting, mainly including iron, chromium, manganese and other metal materials. The melting temperature can be 1500-1600°C.
[0017] Step S2, detecting the manganese content in the first alloy powder.
[0018] In step S3, ...
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Abstract
The invention relates to a method for preparing stainless steel, which comprises the following steps: first alloy powder is obtained by atomizing and pulverizing metal materials after melting; detecting the manganese content in the first alloy powder, if the mass fraction of the manganese element is less than 12 %, then add a preset amount of manganese-containing material to the first alloy powder, heat and knead with plastic to obtain the second alloy powder, so that the mass fraction of manganese in the second alloy powder reaches 12-15 %; and the second alloy powder is granulated, injected and sintered to obtain a finished product. The product prepared by the invention has low magnetic permeability, and the method is easy to operate.
Description
technical field [0001] The invention relates to the technical field of stainless steel production, in particular to a method for preparing stainless steel. Background technique [0002] In the prior art, the sintering feed ingredients of commercial stainless steel basically contain 10-12wt% manganese in the stainless steel substrate, and then a nitrogen atmosphere is applied during the sintering process to allow nitrogen to diffuse in the stainless steel substrate to increase the nitrogen content. It is hoped that In this way, the stainless steel is enriched with wosfield iron-forming elements, so that the magnetic permeability of the product is very small. However, the melting point of manganese is 1241-1247°C. When the sintering temperature of stainless steel is frequently 1300°C, the manganese in the alloy is easily burnt, resulting in insufficient manganese. Since manganese will increase the solid solution of nitrogen in stainless steel, when manganese is burned out, th...
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IPC IPC(8): B22F3/22B22F1/00B22F1/10
CPCB22F3/225B22F2998/10B22F1/10B22F9/082B22F3/1007C21D1/78C22C33/0278C22C33/0285B22F2999/00B22F2201/20C21C5/005C21C5/5264
Inventor 叶东昌朱金洪
Owner CHAMP TECH OPTICAL FOSHAN