热轧汽车大梁钢冲压开裂影响因素分析  

Influential Factors Analysis of Stamping Cracking for Hot Rolled Truck Beam Steel

作　　者：孟宪堂[1] 王小勇[1] 李瑞恒[2] 于洋[1] 周娜[2] 王伦[2] 

机构地区：[1]首钢技术研究院 [2]首钢股份公司迁安钢铁公司

出　　处：《首钢科技》2014年第6期22-26,40,共6页Shougang Science and Technology

摘　　要：结合首钢热轧汽车大梁钢在应用过程中出现的实际开裂问题，从用户加工质量、大梁钢质量和特殊需求等角度进行了综合分析；利用光学显微镜和扫描电镜对热轧汽车大梁钢的冲压开裂进行了微观组织分析。结果表明，碳化物等在晶界上的析出、长度为几微米的含铌块状物和带钢表面氧化铁皮压入均会直接影响热轧汽车大梁钢的成型性能，并最终导致其在成型过程中开裂。Aiming at the stamping cracking problems of Shougang hot rolled truck beam steel, comprehensive analysis were carried out, including pressing quality, steel product quality and customer special requirements. By means of OM and SEM, the microstructure of the cracked samples of hot rolled truck beam steel was analyzed. The results showed that carbide precipitated at grain boundaries, lump precipitates containing niobium with length of several microns, rolled-in scale on the strip surface were the major reasons that caused cracking of hot rolled truck beam steel during the process of stamping.

关 键 词：加工质量 开裂 中心偏析 析出物 

分 类 号：TF762.3[冶金工程—钢铁冶金]