Ferritic stainless steel with good wrinkle resistance and production method thereof

Abstract

The invention relates to ferritic stainless steel with good wrinkle resistance and a production method thereof. The ferritic stainless steel comprises the following components by weight percentage: less than or equal to 0.02 percent of C, less than or equal to 0.02 percent of N, 0.10-0.50 percent of Si, 0.10-0.50 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.01 percent of S, 16-30 percent of Cr, less than or equal to 1.00 percent of Ni, 0.15-0.40 percent of Nb, less than or equal to 16 percent of Nb/(C+N), less than or equal to 0.010 percent of O, less than or equal to 1.00 percent of Cu and the rest being Fe and inevitable impurity elements. Since the stabilization element Ti which can damage the surface quality of continuous casting and increase the brittle transition temperature is not added, and only the stabilization element Nb is added, the invention can reduce the quantity of casting blank repair and the strip breakage risk, improve the surface quality and overall performance, eliminate the wrinkle of the surface of the ferriticstainless steel cold-rolled plate with a medium and high Cr content, reduce the wear and repair loss during the production process, and decrease the production cost.

Description

technical field [0001] The invention belongs to the field of stainless steel product manufacturing, and mainly relates to the use of monostable element Nb to form precipitates with C and N in ferritic stainless steel, improve the comprehensive performance of ferritic stainless steel, and combine the manufacturing process to improve pure ferrite Surface wrinkling of stainless steel after cold rolling. Background technique [0002] Ferritic stainless steel, especially medium and high Cr ultra-pure ferritic stainless steel with low C and N content is more and more popular. This is because compared with the traditional ferritic stainless steel with high C and N content, its corrosion resistance and processing performance are greatly improved, and its comprehensive performance is better than nickel-containing austenitic stainless steel in many applications. Body stainless steel. However, when the medium and high Cr ferritic stainless steel is used to produce cold-rolled thicker...

AI Technical Summary

Problems solved by technology

The problem with the above two methods is that the first method cannot completely eliminate the wrinkling problem of the cold-rolled sheet, but also affects the surface quality of the continuous casting slab, increases the grinding amount of the slab, and increases the brittle transition temperature of the steel

The second method wastes energy, increases process costs and affects production rhythm

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