摘要
通过实验测定、金相观察和理论分析,系统研究了稀土在BN bRE重轨钢中的赋存状态和存量的变化规律,及其对微观组织的影响作用机制。研究发现,对于BN bRE重轨钢而言,加入大量的稀土并不能增加钢中的固溶稀土含量,固溶稀土含量均保持在0.0012%以下。少量的固溶稀土可以细化BN bRE重轨钢的奥氏体晶粒度和珠光体片层结构。
Effects of RE on microstructure of BNbRE steel were studied by means of experimental measurement, microscopic structure observation and theoretical analysis. And the state and the content of RE in BNbRE steel were measured. For BNbRE steel, the content of dissolved RE did not increase while a great deal of RE was added, being lower than 0. 0012%. A little of RE could refine the grain size of the austenite and the laminae structure of the pearlite in BNbRE steel.
出处
《稀土》
EI
CAS
CSCD
北大核心
2005年第5期72-76,共5页
Chinese Rare Earths
基金
国家自然科学基金项目(50204005)
国家科技攻关项目(2002BA315A-5)
关键词
稀土
重轨钢
微观组织
奥氏体
珠光体
rare earth
heavy rail steel
microstructure
austenite
pearlite
