摘要
介绍了工程机械用Q345FCAD疲劳钢板的研发过程,研究了其微观组织、力学性能及疲劳性能。结果表明,Q345FCAD组织类型为铁素体+珠光体,晶粒度为11级;钢板的拉伸和冲击性能均满足技术指标(YB/T 4570-2016)要求且余量充足;钢板的疲劳强度为307 MPa,疲强比不低于0.55,钢中的夹杂物尺寸很小,疲劳源均出现在基体表面,没有出现因钢中夹杂物成为疲劳源而断裂的情况。
The development process of fatigue steel plate of Q345FCAD for engineering machinery was introduced,and its microstructure,mechanical properties and fatigue properties were studied.The results showed that the structure of Q345FCAD was ferrite+pearlite,the grain size was grade11;the tensile and impact properties meet the requirements of technical indexes(YB/T 4570-2016)and have sufficient spare capacity;the fatigue strength is 307 MPa,the fatigue strength ratio is no less than 0.55;the inclusion size in the steel is small.The fatigue source is on the matrix surface,and inclusions are not the source of fatigue fracture.
作者
刘继宏
李明
Liu Jihong;Li Ming(Nanjing Iron and Steel Co., Ltd., Nanjing, Jiangsu, 210035)
出处
《河北冶金》
2020年第5期11-16,共6页
Hebei Metallurgy
