成型性优良的热轧高强度钢板的开发［日］野村茂树等１绪言用热轧钢板制作汽车行走部件等具有复杂形状的结构件时，要求材料的冲压成型性与强度共存。添加微量Ｎｂ、Ｔｉ、Ｖ等元素的高强度低合金钢板可作高强度热轧钢板使用，但最近汽车部件倾向于高强度钢化，更加要求大... Development of high-strength hot-rolled high-strength steel sheet with excellent formability [1] Hideki Nomura, etc. 1 Introduction When manufacturing a complicated structure such as an automobile running part from a hot-rolled steel sheet, it is required that the press formability and strength of the material coexist. High-strength low-alloy steel plate with addition of trace elements such as Nb, Ti and V can be used as high-strength hot-rolled steel plate, but recently the auto parts tend to be high-strength tempered and require more ...