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A kind of 310s stainless steel preparation method and 310s stainless steel

A technology of stainless steel and ladle, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of difficult production of 310S stainless steel, difficulty in meeting steel grade requirements, and longitudinal cracks in billets, so as to reduce the occurrence of longitudinal cracks and improve surface quality , The effect of homogenization of raw materials

Active Publication Date: 2021-09-07
ZHANGJIAGANG POHANG STAINLESS STEEL
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  • Description
  • Claims
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Problems solved by technology

The disadvantage is that the production of 310S stainless steel is more difficult: deoxidation is more difficult, and the ordinary production process can only reach the oxygen content level of 50ppmm, which is difficult to meet the requirements of the steel type; the billet obtained by the existing process conditions is prone to longitudinal cracks; Difficulties and other problems

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  • A kind of 310s stainless steel preparation method and 310s stainless steel
  • A kind of 310s stainless steel preparation method and 310s stainless steel
  • A kind of 310s stainless steel preparation method and 310s stainless steel

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with specific examples.

[0040] A 310S stainless steel, in terms of mass percentage, the 310S stainless steel includes the following components: C: 0.03-0.06; Si: 0.40-0.70; Mn: 1.30-1.60; P≤0.025; S≤0.0010; Cr: 25.30-25.90 ; Ni: 19.00~19.80; Mo: 0~0.5; N: 0.02~0.05; Cu: 0~0.5; Al: 0~0.1200; Cr is formed on the surface during isothermal oxidation 2 o 3 Protective oxide film, and no internal oxidation; at the same time, increasing the nickel content can improve the adhesion of the oxide film, reduce peeling, and its high temperature oxidation resistance is greatly improved. The preparation method of the 310S stainless steel includes smelting→continuous casting→hot rolling→annealing and pickling;

[0041] Wherein the smelting steps include:

[0042] A1) EAF (Electric Furnace) melts alloys and scrap steel, the temperature reaches 1550°C, and slag is removed after tapping;

[0043] A2) AOD (Argon Oxy...

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Abstract

The invention discloses a preparation method of 310S stainless steel and 310S stainless steel. In terms of mass percentage, 310S stainless steel includes the following components: C: 0.03-0.06; Si: 0.40-0.70; Mn: 1.30-1.60; P≤0.025; S≤0.0010 ; Cr: 25.30~25.90; Ni: 19.00~19.80; Mo: 0~0.5; N: 0.02~0.05; Cu: 0~0.5; Al: 0~0.1200; Hot rolling → annealing and pickling. The invention has the beneficial effects of effectively reducing the oxygen content of the plain steel and improving the surface quality of the product through the precise control of the oxygen content; the surface oxide skin is easy to clean, has excellent heat resistance, and is suitable for harsh high-temperature environments.

Description

technical field [0001] The invention belongs to the technical field of stainless steel production, and in particular relates to a 310S stainless steel applicable to a high-temperature-resistant environment in the petrochemical industry and a preparation method thereof. Background technique [0002] With the development of the petrochemical industry, more and more operations are carried out under high temperature conditions, but equipment materials at high temperatures are prone to corrosion and failure. In the prior art, 310S stainless steel (2520) is an austenitic chromium-nickel stainless steel. Due to its high content of nickel (Ni) and chromium (Cr), it has good oxidation resistance, corrosion resistance, acid and salt resistance, and high temperature resistance. It is widely used in the petrochemical industry. There are many applications. The disadvantage is that the production of 310S stainless steel is more difficult: deoxidation is more difficult, and the ordinary p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06B22D11/22C21D1/26C21D6/00C21D8/02C21D9/54C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/58C23G1/08C23G3/02
CPCB22D11/225C21D1/26C21D6/004C21D6/005C21D6/008C21D8/0226C21D9/54C22C33/06C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/58C23G1/086C23G3/02Y02P10/20
Inventor 陈功荣青亮林鸿亮
Owner ZHANGJIAGANG POHANG STAINLESS STEEL
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