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Preparation method of 310S stainless steel and 310S stainless steel

A technology for stainless steel and stainless steel strips, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of longitudinal cracks in the casting billet, difficulty in meeting steel grade requirements, and difficulty in deoxidation, and achieve the goal of reducing oxygen content and improving product surface quality. Effect

Active Publication Date: 2020-01-10
ZHANGJIAGANG POHANG STAINLESS STEEL
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AI Technical Summary

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

Method used

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  • Preparation method of 310S stainless steel and 310S stainless steel
  • Preparation method of 310S stainless steel and 310S stainless steel
  • Preparation method of 310S stainless steel 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; the balance is Fe; 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;...

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Abstract

The invention discloses a preparation method of 310S stainless steel and the 310S stainless steel. The 310S stainless steel is prepared from the following components in percent by mass: 0.03-0.06% ofC, 0.40-0.70% of Si, 1.30-1.60% of Mn, less than or equal to 0.025% of P, less than or equal to 0.0010% of S, 25.30-25.90% of Cr, 19.00-19.80% of Ni, 0-0.5% of Mo, 0.02-0.05% of N, 0-0.5% of Cu, 0-0.1200% of Al and the balance Fe. The preparation method comprises the following steps: smelting; continuous casting; hot rolling; annealing and pickling. The preparation method has the beneficial effects that the oxygen content of plain steel is reduced effectively by controlling the oxygen content precisely, so that the surface quality of a product is enhanced; surface scales are easy to clean, andthe 310S stainless steel has excellent heat resistance and is suitable for a severe high-temperature environment.

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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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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