反应堆压力容器锻件和焊缝金属的热稳定性研究  

THERMAL STABILITY OF REACTOR PRESSURE VESSEL FORGINGS AND WELD METAL

作　　者：王华明[1] 王均安[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《上海金属》2016年第1期6-10,共5页Shanghai Metals

基　　金：973资助项目(No.2011CB610503)

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.

关 键 词：反应堆压力容器钢 锻件 焊缝 热时效 力学性能 

分 类 号：TG457.11[金属学及工艺—焊接]