论文部分内容阅读
本文结合结构钢20GMnTi在慢速加热时出现的组织遗传现象,系统地分析了慢速加热时出现组织遗传的原因。结果表明:过热淬火组织以慢速加热时,首先在马氏体板条间形成位向大体一致的针形奥氏体(γ_a),在转变结束时,这些针形γ_a相互合并成一个粗大的奥氏体晶粒是造成遗传的主要原因。在超过A_(C3)以上的奥氏体单相区并没有发生奥氏体的自发结晶现象,并且研究了回火程度和慢速加热前的预形变对组织遗传的影响。最后结合近年来的研究工作指出切断遗传的几种方法。
In this paper, combined with the genetic phenomenon of tissue 20GMnTi in slow heating, we systematically analyzed the reason of tissue heredity in slow heating. The results show that when the superheated quenched structure is heated slowly, the needle-shaped austenite (γ_a) is formed in the martensite slab at first and then coalesced into a coarse Austenite grains are the main cause of inheritance. The spontaneous crystallization of austenite did not occur in the austenite single phase region above A_ (C3), and the effect of tempering degree and pre-deformation before slow heating on the heredity of the tissue was investigated. Finally, in combination with recent research, several methods of cutting off inheritance have been pointed out.