High-surface quality ferrite stainless steel plate and manufacturing method thereof

Abstract

The invention discloses a high-surface quality ferrite stainless steel plate and a manufacturing method thereof. The high-surface quality ferrite stainless steel plate comprises, by weight, less than or equal to 0.03% of C, 0.20 to 1.0% of Si, less than or equal to 1.0% of Mn, less than or equal to 0.03% of P, less than or equal to 0.01% of S, 16 to 20% of Cr, 0.75 to 2.0% of Mo, 0.42 to 0.7% of Nb, less than or equal to 0.03% of N, less than or equal to 0.005% of Al, less than or equal to 0.005% of O and the balance Fe and unavoidable impurities, wherein based on Nb content, C content and N content respectively represented by Nb, C and N, Nb-20*C-7*N is greater than or equal to 0.15% and less than or equal to 0.7% and 1.2*C+N is less than or equal to 0.04%. Through smelting, hot rolling, two-rolling process cold rolling, bright annealing and flattening, the high-surface quality ferrite stainless steel plate which is a high-glossiness high-brightness low-roughness high-surface quality mirror material is obtained, has excellent corrosion resistance, cold deformation wrinkling resistance, high yield strength and high surface hardness and is suitable for automobile outer-decoration bright strips (pieces) and furniture decoration bright strips having high surface quality requirements.

Description

technical field

[0001] The present invention relates to a ferritic stainless steel plate, in particular to a high surface quality ferritic stainless steel plate with high gloss, high brightness, low roughness, corrosion resistance, and cold deformation wrinkling resistance and its manufacture The method, the surface gloss at 20° angle is more than 1000, the surface roughness is less than 0.060 μm, the pitting corrosion potential is more than 298mv, and the surface roughness evaluation index Pt value obtained after 15% pre-stretching is less than 15 μm. It is suitable for automotive exterior decorative bright strips (pieces), furniture decorative bright strips, etc. with high surface quality requirements. Background technique

[0002] With the development of the national economy, the automobile industry and home decoration industry have also developed vigorously. The sharp increase in automobile production and sales has also stimulated the expansion of the scale of automobile...

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