首页>
外国专利>
HIGH TENSILE STRENGTH HOT ROLLED STEEL SHEET HAVING EXCELLENT PRECISION BLANKING WORKABILITY AND RED SCALE FLAW RESISTANCE
HIGH TENSILE STRENGTH HOT ROLLED STEEL SHEET HAVING EXCELLENT PRECISION BLANKING WORKABILITY AND RED SCALE FLAW RESISTANCE
展开▼
机译:高抗拉强度的热轧钢板,具有出色的精密冲裁加工性和抗红鳞剥落性
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To provide a high tensile strength hot rolled steel sheet which is suitable for applications in which various machine parts and automobile parts are produced by performing precision blanking, has excellent dimensional precision in the precision blanking-worked face, also has extremely high surface hardness in the blanked face after the working, further has excellent red scale flaw resistance, and has a tensile strength of ≥490 MPa and a local elongation of ≥10%.;SOLUTION: The steel sheet has a composition comprising ≤0.10% C, 0.01% Si, ≤1.5% Mn and ≤0.20% Al, further comprising Ti and Nb in the range satisfying (Ti+Nb)/2:0.05 to 0.50%, and comprising ≤0.005% S, ≤0.005% N and ≤0.004% O so as to control the total of S, N and O to ≤0.0100%, and has a microstructure substantially consisting of a ferrite single phase structure of ≥95%.;COPYRIGHT: (C)2004,JPO
展开▼