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A kind of austenitic stainless steel and preparation method thereof

A technology for austenitic stainless steel and steel plate, applied in the field of austenitic stainless steel preparation, can solve the problems of increased cost and poor austenite stability, and achieve the effect of low hardness and yield strength

Active Publication Date: 2021-11-12
NINGBO BAOXIN STAINLESS STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent replaces the austenite-forming element Ni by adding Mn and N, and adds a certain amount of Cu elements and rare earth elements, which increases the cost and has poor austenite stability.

Method used

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  • A kind of austenitic stainless steel and preparation method thereof
  • A kind of austenitic stainless steel and preparation method thereof
  • A kind of austenitic stainless steel and preparation method thereof

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] In terms of mass percentage, the chemical composition of austenitic stainless steel is C: 0.030-0.045%, N: 0.020-0.04%, Ni: 8.50-10.50%, Cu: 1.60-2.00%, Mn: 1.60-2.00%, Cr : 17.00~19.00%, Si: 0.20~0.60%, P: less than or equal to 0.040%, S: less than or equal to 0.015%, the rest is Fe and unavoidable impurity elements; among them, Ni equivalent = Ni+30*(C+N )+0.5*(Mn+Cu); and Cr equivalent=Cr+1.5*Si; in the present embodiment, Ni equivalent value is greater than 12.00, and Cr equivalent value is 17.00~20.00. The chemical composition of 5 embodiments is as follows Table 1 shows.

[0038] The chemical composition of each embodiment of table 1

[0039] Unit: mass%

[0040]

[0041]The composition design of the above five embodiments is controlled in the austenite region of the Cr-Ni equivalent diagram, so that the material has higher ...

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Abstract

The invention relates to an austenitic stainless steel and a preparation method thereof, wherein the austenitic stainless steel is characterized in that, in terms of mass percentage, the chemical composition of the austenitic stainless steel is C: 0.030-0.045%, N: 0.020~0.04%, Ni: 8.50~10.50%, Cu: 1.60~2.00%, Mn: 1.60~2.00%, Cr: 17.00~19.00%, Si: 0.20~0.60%, P: less than or equal to 0.040%, S : Less than or equal to 0.015%, the rest is Fe and unavoidable impurity elements. Through a reasonable combination of ingredients, the amount of interstitial elements C and N used is controlled within an appropriate range, the content of Ni and Ni replacement solid solution elements such as Mn and Cu is increased, the austenite stability of stainless steel is improved, and cold work hardening is reduced. sex.

Description

technical field [0001] The invention relates to a preparation method of austenitic stainless steel, in particular to an austenitic stainless steel for cold drawing of a thermos cup and a preparation method thereof. Background technique [0002] Stamping forming of thermos cup is a deep drawing forming, the stamping ratio is generally above 3.0, and usually needs to go through 3 to 5 times of deep drawing, which has extremely high requirements on the fluidity and aging cracking resistance of the material. [0003] Ordinary 304 stainless steel is a metastable austenitic stainless steel, which will induce a large amount of martensitic transformation during the drawing process, resulting in transformation hardening. Higher transformation hardening plus deformation hardening will lead to deep drawing cracking and aging cracking , Side wall cracking and other cracking phenomena. Therefore, ordinary 304 steel stamping products can only meet the requirements of cold drawing forming...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/42C22C38/58C21D8/02C21D1/26
CPCC21D1/26C21D8/0226C21D8/0236C21D2211/001C22C38/001C22C38/002C22C38/02C22C38/42C22C38/58
Inventor 邬珠仙张波陈作祥张朝波胡青松
Owner NINGBO BAOXIN STAINLESS STEEL
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