High-strength ferritic stainless steel band and manufacturing method thereof

Abstract

The invention provides a high-strength ferritic stainless steel band, which comprises the following components in percentage by weight: less than or equal to 0.015 percent of C; less than or equal to 1.0 percent of Si; less than or equal to 1.0 percent of Mn; 10.5 to 17.0 percent of Cr; less than or equal to 0.03 percent of P; less than or equal to 0.01 percent of S; less than or equal to 0.1 percent of Ni; less than or equal to 0.015 percent of N; less than or equal to 0.03 percent of Al; less than or equal to 0.006 percent of O; less than or equal to 0.025 percent of C+N; 10(C+N) to 0.60 percent of Nb or 8(C+N) to 0.30 percent of Ti or more than or equal to 10(C+N) to 0.60 percent of Ti+0.5Nb, wherein the ratio of Nb to Ti is between 1.0 and 2.0; the balance of Fe and unavoidable impurities. The invention also provides a method for manufacturing the steel band, which comprises the steps of smelting, continuous casting, coping, hot rolling, annealing and pickling, cold rolling and pickling and bundling. The steel band has higher strength and lower cost and belongs to the environmental-friendly material.

Description

technical field [0001] The present invention relates to a stainless steel, in particular, the present invention relates to a high-strength ferritic stainless steel. Background technique [0002] With the continuous development of the electronics industry, the output of various electronic products such as televisions and computers continues to increase, and people's requirements for the appearance of products are also constantly improving. A large number of liquid crystal displays, mobile phone casings, etc. use special frames, resulting in a significant increase in the amount of ferritic stainless steel dedicated to liquid crystal display frames. At present, this ferritic stainless steel is mainly used to manufacture frames of electronic products such as TVs, computers, mobile phones, etc., which requires it to have high strength and good corrosion resistance. [0003] Ferritic stainless steel is produced by an ultra-low carbon and nitrogen process, and the corrosion resist...

AI Technical Summary

Problems solved by technology

Adding elements such as V to improve the strength of stainless steel in this chromium stainless steel can increase the yield strength of stainless steel by about 100Mpa, reaching the level of 300-350Mpa, but it still cannot meet the needs of higher-strength thin strip materials

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