碳含量对500 MPa级特厚钢板组织性能的影响  

Effect of Carbon Content on the Microstructure and Properties of Super-thick Steel Plate with Yield Strength 500 MPa

作　　者：杨跃辉[1] 商兴国[1] 张晓娟[1] 苑少强[1] YANG Yue-hui;SHANG Xing-guo;ZHANG Xiao-juan;YUAN Shao-qiang(Department of Mechanical and Electrical Engineering,Tangshan University,Tangshan 063000,China)

机构地区：[1]唐山学院机电工程系

出　　处：《唐山学院学报》2019年第6期39-42,共4页Journal of Tangshan University

基　　金：河北省自然科学基金-钢铁联合研究基金项目(E2019105101);唐山学院科研创新项目

摘　　要：分别采用常规碳和低碳的成分设计开发出了屈服强度500 MPa级的特厚调质钢板,对比分析了其组织和性能的差异,结果表明:采用常规成分设计时,调质处理后获得回火索氏体,具有高的强韧性匹配,因此更适合高强度、大厚度产品的生产;采用低碳贝氏体的成分设计时,经较低温度回火能获得较高的低温韧性,但力学性能的热稳定性较差,因此更适用于较低强度级别的特厚板或薄规格的高强板的生产。The composition designs with conventional carbon and low carbon content are used respectively to develop a super-thick quenched-and-tempered steel plate with yield strength of 500 MPa,then the difference of the microstructure and properties between them is analyzed. The results shows that,with the conventional composition design,the tempered sorbite is obtained with top match of strength and toughness after quenching and tempering treatment,which is more suitable for the products with high strength and great thickness;with the low-carbon bainite composition design,the excellent low-temperature toughness could be obtained through tempering at lower temperature,but the thermal stability of mechanical properties is poor, which is more suitable to the production of the super-thick steel plate with lower strength or the thin high-strength plate.

关 键 词：特厚钢板 碳含量 低碳贝氏体钢 组织性能 调质工艺 

分 类 号：TG142.1[一般工业技术—材料科学与工程]