摘要
本文研究了高温、长期时效状态下的20Cr11MoVNbNB钢的微观组织和性能。结果表明:基体强化(包括固溶强化和位错强化)、弥散强化是该钢的两个主要强化机制。当L-M参数P<20.3×10~3时,以基体强化为主;当P>20.3×10~3时,以弥散强化为主。当Laves相MoFe_2析出、基体中Mo含量迅速下降及基体发生明显回复再结晶时,该钢强度迅速降低。
in the paper, the microstructure and mechanical properties of 20Cr11Mo -VNbNB steel after aging at high temperature for a long time are studied. It is established that the matrix strenthening (including solution and dislocation strenthening) and dispersed phase strenthening are main strenthening mechanism of the steel. While L-M parameter P<20.3xxxxxxxxxxl03, the matrix strenthening is main strenlhening factor; while P<20.3xxxxxxxxxxxxxxl03, the dispersed phase strenthening is main slrenthening. With Laves phase MoFe2 separating, Mo content in matrix dropping down rapidly and the obvious recovery and recrystallization of matrix starting, the strenth and hardness of the steel drop down remarkably.
出处
《太原重型机械学院学报》
1991年第3期66-74,共9页
Journal of Taiyuan Heavy Machinery Institute
关键词
耐热钢
基体强化
弥散强化
热处理
matrix strerthinp
, dispersed phase strenthing, L-M parameter P
