机械制造、造船、压力容器和建设行业经常要求使用屈服点在500MPa以上而焊接性能良好的钢板,以前通常是将热轧合金钢板采用淬火—回火热处理,不足之处是增加能源消耗. 从节约能源出发,日本研制出采用添加微量合金和控轧控冷的方法生产出高屈服点的非调质钢板。化学成分(wt%):C0.005～0.15%、 Mechanical manufacturing, shipbuilding, pressure vessels and construction industries often require the use of yield point above 500MPa and good welding performance of the plate, the hot rolled alloy steel is usually used before quenching - tempering heat treatment, the downside is to increase energy consumption. Starting from energy, Japan has developed a non-quenched and tempered steel sheet with high yield point by adding micro-alloy and controlled rolling and controlled cooling. Chemical composition (wt%): C0.005 ~ 0.15%,