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BAKING HARDENING TYPE COLD ROLLED STEEL SHEET HAVING INCREASED YIELD STRENGTH AND PROCESS FOR PRODUCING THE SAME
BAKING HARDENING TYPE COLD ROLLED STEEL SHEET HAVING INCREASED YIELD STRENGTH AND PROCESS FOR PRODUCING THE SAME
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机译：烘烤硬化型冷轧钢板，其屈服强度和制造方法相同
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摘要
The fine (Mn, Cu) S precipitates and cold-rolled steel sheet and a manufacturing method that the yield strength and in-plane anisotropy improved by the AlN precipitates in the IF steel is provided. ; By weight%, C: 0.001-0.01%, Cu: 0.01-0.2%, Mn: 0.01-0.3%, S: 0.005-0.08%, Al: less than 0.1%, N: 0.004-0.02%, P: 0.2% or less , B: 0.0001-0.002%, Nb: 0.001 ~ 0.05%, and balance of Fe and other unavoidable impurities in the composition, ; The Cu, Mn, S, Al, N, C, Nb is Cu + Mn :0.08-0 .4%, (Mn/55 + Cu/63.5) / (S/32) :1-30, (Al/27) / (N / 14): 1-20 ; Satisfy the 5-30: Cs (solute carbon) ; (Here, Cs = (C-Nbx12 / 93) x10000) ; (Mn, Cu) S precipitates and the average size of the AlN precipitate comprises a 0.2㎛ below. ; In the present invention, unlike the technology and using the technique of adding a Cu or Cu to the corrosion resistance in the IF steel by precipitation of ε-Cu phase, to use with the MnS precipitates and AlN precipitates while using the Cu as fine CuS precipitates. ; Baking-curable, automotive materials, (Mn, Cu) S precipitates, AlN precipitates, the in-plane anisotropy, the yield strength
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