摘要
运用光学(OM)、扫描(SEM)和透射(TEM)电镜等方法,研究了不同时效温度下高强度含Cu钢的力学性能,并对微观组织结构进行了系统分析。结果表明,时效温度为640℃时,钢的强度超过785 MPa,该钢可以获得良好的低温韧性和塑性匹配。分析得出ε-Cu的析出强化、板条结构的回火马氏体组织及"有效晶粒尺寸"的细化,是试验钢获得优良综合性能的主要原因。
Mechanical properties of high strength copper-contained steel were investigated under different aging temperatures, and microstructure was observed by microscope ( OM) , scanning electron microscope ( SEM) and transmission electron microscope ( TEM) . The results show that when the aging temperature is 640 ℃, the strength of steel is more than 785 MPa and the good combination of low-temperature toughness and ductility are obtained. The precipitation strengthening ofε-Cu, tempered martensite lath structure and refinement of "effective grain size" play the main roles on excellent comprehensive performance of the steel.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第6期97-100,共4页
Heat Treatment of Metals
关键词
高强度含Cu钢
时效温度
组织
性能
high strength copper-contained steel
aging temperature
microstructure
properties
