Mo-Ti高强钢强度波动原因分析  

Cause Analysis on Strength Fluctuation of High-strength Steel with Mo-Ti

作　　者：梁文[1,2] 吴润[1] 刘志勇[2] 陶文哲[2] 陈吉清[2] 谭佳梅 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]武钢研究院,湖北武汉430080 [3]武钢股份CSP分厂,湖北武汉430083

出　　处：《钢铁钒钛》2015年第1期81-84,共4页Iron Steel Vanadium Titanium

摘　　要：采用金相检测、能谱分析等方法,对Mo-Ti高强钢强度波动的原因进行了研究,结果表明:卷取温度设定过高和板宽方向温度不均匀是造成Mo-Ti高强钢强度波动的主要原因。0.12%Ti-0.10%Mo高强钢的最佳析出温度为570℃,Mo元素能促使含Ti钢中生成大量细小而弥散的第二相(MoxTi1-x)(CyN1-y),这些纳米级的第二相能产生强烈的析出强化效果。通过下调卷取温度以及采取层流冷却边部遮挡等措施,得到了抗拉强度800 MPa、强度均匀的高强钢。The cause of strength fluctuation of Mo-Ti microalloyed high-strength steel was investigated by metallography observation and energy spectrum analysis. The results showed that strength fluctuation was mainly caused by higher coiling temperature and the inhomogeneous temperature profile through width direction. Thepeak precipitation temperature of the high-strength steel with 0. 12Ti- 0. 10Mo（ %） was about 570 ℃. Mo could promote a large amount of second phase（ MoxTi1- x）（ CyN1- y） precipitates in Ti microalloyedsteel,and the dispersive and nano-size second phase could yield strong precipitation strengthening effect. By lowering the coiling temperature and adopting the edge-masking technology in the laminar cooling line,the high-strength steel with tensile strength more than 800 MPa and homogeneous strength was obtained.

关 键 词：Mo-Ti高强钢 强度波动 析出温度 

分 类 号：TG142.15[一般工业技术—材料科学与工程]