摘要
采用热时效的方法对反应堆压力容器锻件、焊缝金属的热稳定性进行了研究。结果表明,第二相强化与固溶强化的共同作用使得锻件、焊缝金属的抗拉强度、屈服强度在时效过程中均呈先上升后下降(在500 h时达到峰值)的趋势。焊缝中的Mn-Si-Al-O夹杂物的析出促进了针状铁素体的非均匀形核,焊缝金属的组织更细小,相对母材具有更高的热稳定性。
The effect of thermal aging on microstructure and mechanical properties of reactor pressure vessel steels was studied. Tensile and yield strength of both forgings and weld metal rose firstly and then descended with extending the aging time. The Mn-Si-Al-0 inclusions promoted the heterogeneous nucleation of acicular ferrite in weld metal. Weld metal exhibited a higher thermal stability compared with forgings.
出处
《上海金属》
CAS
北大核心
2016年第1期6-10,共5页
Shanghai Metals
基金
973资助项目(No.2011CB610503)
关键词
反应堆压力容器钢
锻件
焊缝
热时效
力学性能
Reactor Pressure Vessel Steel, Forgings, Weld Metal, Thermal Aging, Mechanical Property
