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
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[0039] The present invention will be further described below in conjunction with specific embodiments.
[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 at ℃ 2 O 3 Protective oxide film without internal oxidation; at the same time, increasing the nickel content can improve the adhesion of the oxide film, reduce peeling, and greatly improve its high temperature oxidation resistance. The preparation method of the 310S stainless steel includes smelting→continuous casting→hot rolling→annealing and pickling;
[0041] The smelting steps include:
[0042] A1) EAF (Electric Furnace) melts the alloy and scrap steel, the temperature reaches 1550 ℃, and the slag is removed after tapping;
[0043] A2) AOD (Argon ...
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