论文部分内容阅读
通过合理的钢种成分设计,模铸、钢锭加热和3 800mm轧机轧制及热处理工艺设计,采用晶粒细化、固溶强化、析出强化等手段,研发了厚度400mm的特厚板Q345E。钢板的屈服强度控制在305～350MPa,平均为335MPa;抗拉强度控制在470～555MPa,平均达到530MPa;伸长率控制在23%～28%,平均达到26%;-40℃纵向冲击功控制在109～287J,平均达到了198J,实现了强度和韧性的良好匹配,并具有较高的内部质量。
Through reasonable steel composition design, die casting, ingot heating and 3 800mm rolling mill and heat treatment process design, using the grain refinement, solid solution strengthening, precipitation strengthening and other means, developed a thick 400mm thick plate Q345E. The yield strength of the steel plate is controlled at 305-350 MPa with an average of 335 MPa. The tensile strength is controlled at 470-555 MPa with an average of 530 MPa. The elongation is controlled at 23-28% with an average of 26%. Longitudinal impact power control at 40 ° C In 109 ~ 287J, an average of 198J, to achieve a good strength and toughness of the match, and has a high internal quality.