核电主设备支承件用12MDV6铸钢成分及热处理工艺对性能的影响  

Effects of composition and heat treatment process on properties of 12MDV6 cast steel for nuclear power main equipment supporting

作　　者：尤申申 于海华 You Shenshen;Yu Haihua(State Nuclear Power Plant Service Co.,Ltd.,Shanghai 201100,China;Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd.,Shanghai 201100,China)

机构地区：[1]国核电站运行服务技术有限公司,上海201100 [2]上海核工程研究设计院有限公司,上海201100

出　　处：《金属热处理》2022年第6期186-192,共7页Heat Treatment of Metals

摘　　要：利用拉伸试验、冲击试验、金相检测及成分检测等方法,通过对比不同成分及热处理工艺对核电主设备支承件用12MDV6铸钢力学性能的影响,提出合理的热处理工艺及成分控制措施。结果表明,回火温度对拉伸性能影响较大,适宜的回火温度为690℃;碳含量及合金当量增加会提高强度,合金当量对伸长率无明显影响;低温冲击性能的不合格主要是Al含量过高造成的,Al成分宏观偏析会造成低温冲击吸收能量的波动,为使冲击性能达到要求,宜将Al含量控制在0.018%以下。By comparing effects of different compositions and heat treatment processes on the mechanical properties of 12 MDV6 cast steel for nuclear power main equipment supporting, a reasonable heat treatment process and composition control were proposed by tensile test, impact test, metallographic test and composition test. The results show that the tempering temperature has a great influence on the tensile properties, and the appropriate tempering temperature is 690 ℃. The strength increases with increasing of the carbon content and alloying elements, but alloying elements have no obvious influence on elongation. The unqualified low temperature impact property is mainly caused by the high content of Al, macrosegregation of Al composition causes fluctuations in low temperature impact absorbed energy. In order to meet the requirements of impact property, the Al content should be controlled below 0.018%.

关 键 词：12MDV6铸钢 性能 成分 热处理工艺 

分 类 号：TG156[金属学及工艺—热处理]