Manufacturing method of high nitrogen and low nickel copper-free austenitic stainless steel

A technology of austenitic stainless steel and its manufacturing method, which is applied in the fields of rolling, smelting of stainless steel, and manufacturing of high-nitrogen, low-nickel, copper-free austenitic stainless steel. The effect of low production cost and breakthrough performance bottleneck

Active Publication Date: 2022-06-03
广西柳钢中金不锈钢有限公司 +1
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Problems solved by technology

[0004] The invention provides a method for manufacturing high-nitrogen, low-nickel, copper-free austenitic stainless steel to solve the problem of serious martensitic transformation hardening degree of nickel-saving austenitic stainless steel cold working

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  • Manufacturing method of high nitrogen and low nickel copper-free austenitic stainless steel
  • Manufacturing method of high nitrogen and low nickel copper-free austenitic stainless steel
  • Manufacturing method of high nitrogen and low nickel copper-free austenitic stainless steel

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Embodiment Construction

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention is now described.

[0020] The chemical composition of the high nitrogen and low nickel copper-free austenitic stainless steel of the present invention is: C: 0.12~0.16%, Si: 0.40~

[0025] Chromium equivalent Creq=%Cr+1.5×(%Si)

[0033] AOD smelting is divided into four stages: chemical steel stage, oxidation stage, reduction stage and refining stage. AOD tons of steel raw materials into the furnace:

[0036] The billet heating temperature system: the temperature in the preheating section is 650-800 °C, the temperature in the heating section is 1220-1260 °C, and the temperature in the soaking section is 650-800 °C.

[0041] After annealing, the yield strength of the steel strip is Rp0.2 / MPa≥440Mpa, the tensile strength Rm≥950Mpa, and the elongation after breaking A≥

[0042] The production method of the high nitrogen and low nickel copper...

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Abstract

The invention provides a method for manufacturing a high-nitrogen, low-nickel, copper-free austenitic stainless steel. The components of the high-nitrogen, low-nickel, copper-free austenitic stainless steel are: C: 0.12-0.16%wt%, Si: 0.40- 0.50%wt%, Mn: 8.0~10.0%wt%, P: ≤0.045%wt%, S≤0.005%wt%, Cr: 14.5~15.0%wt%, Ni: 1.0~1.3%wt%, N: 0.18 ~0.20%, the rest is Fe and unavoidable impurity elements. The present invention solves the problem of serious transformation hardening degree of nickel-saving austenite cold-worked martensite while reducing the production cost of the enterprise, optimizes the cold-working performance of the product and improves the limit reduction ratio of the first cold rolling, and reduces the risk of cold-rolling cracking quality and economical efficiency. loss.

Description

Manufacturing method of high nitrogen and low nickel copper-free austenitic stainless steel technical field The present invention relates to steel rolling field, be specifically related to the smelting, rolling of stainless steel, especially a kind of high nitrogen low nickel copper-free Austrian Manufacturing method of tensite stainless steel. Background technique Nickel-saving austenitic stainless steel is a chromium-manganese-nitrogen austenitic alloy developed by manganese and nitrogen to replace scarce and expensive nickel elements. Tensitic stainless steel, because of its good corrosion resistance and high and low temperature performance, is widely used in domestic decoration and pipe making industries. The number of varieties developed and product output of stainless steel enterprises are increasing rapidly year by year. Nickel-saving austenitic stainless steel is a typical metastable For austenitic stainless steel, a large amount of deformation-induced marte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C33/06C21D8/02
CPCC22C38/58C22C38/40C22C38/18C22C38/02C22C38/001C22C33/06C21D8/0226C21D2211/001Y02P10/20
Inventor 曾垚罗庆革杨剑洪邓深樊雷王碧罗兴壮刘川俊陈小龙钱学海田宇航胡中吴海林陈盛淋文宪刚
Owner 广西柳钢中金不锈钢有限公司
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