论文部分内容阅读
日本地震多,土地资源有限,建筑物向高层发展。从防震设计观点出发,要求建筑用钢材具有590MPa级以上的高强度,并要求具有低屈服比在80%以下。日本川崎钢铁公司钢铁研究所以调整化学成分,添加合金元素方法保证屈服强度在590MPa以上。低屈服比主要取决于铁素体组织和马氏体或贝氏体的比例关系等。该所选定的化学成分(wt%):0.02～0.35C,1.44Mn,0.25Cu,0.20Ni,0.22Mo,
There are many earthquakes in Japan, limited land resources and high-rise buildings. From the viewpoint of shockproof design, it is required that the steel for construction has a high strength of 590 MPa or more and a requirement of having a low yield ratio of 80% or less. Japan Kawasaki Iron and Steel Institute of Iron and Steel Institute to adjust the chemical composition, adding alloying elements to ensure the yield strength of 590MPa or more. The low yield ratio mainly depends on the ratio of ferrite and martensite or bainite. The selected chemical composition (wt%): 0.02 ~ 0.35C, 1.44Mn, 0.25Cu, 0.20Ni, 0.22Mo,