摘要
对船板拉伸试样断口分层的原因进行分析和研究,通过试样金相组织扫描证明造成船板拉伸试样断口分层的主要原因是板坯中心偏析严重所致;实践证明,降低板坯中心偏析,可大大降低船板轧后拉伸试样断口改判率。
The reason of rupture lamination phenomena was analyzed during ship plate tensile test.It shows that the cause of rupture lamination of ship plate tensile test was heavy central segregation of slab by scanning of sample＇s metallurgical structure.Practice proved that it could largely decrease re-grading occurrence during rolled ship plate rupture tensile test by improving central segregation of slab.
出处
《连铸》
2010年第6期42-46,共5页
Continuous Casting
关键词
断口分层
金相组织
中心偏析
改判率
rupture lamination
metallurgical structure
central segregation
re-grading
