摘要
通过观察分析冲击试样的断口和金相组织,认为核电压力容器封头锻件低温冲击性能不合格的主要原因是成分偏析,成分偏析导致淬透性差异,使性能热处理后出现组织不均匀,最终导致低温冲击性能不合格。
By observing and analyzing fracture and metallographic structure of impacted specimen,it concluded that composition segregation was the main cause to result in unqualified low temperature impact performance for nuclear reactor pressure vessel head forging.Composition segregation resulted in hardenability difference and uneven microstructure after performance heat treatment to finally cause unqualified low temperature impact performance.
作者
连占卫
周杨
李家驹
Lian Zhanwei;Zhou Yang;Li Jiaju
出处
《大型铸锻件》
2019年第1期38-40,共3页
Heavy Casting and Forging
关键词
核电压力容器
封头
低温冲击
nuclear pressure vessel
head forging
low temperature impact
