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本文以低压转子钢30Cr2Ni4MoV为研究对象,将其粗大非平衡组织多次降梯加热后,保温适当时间后淬火,分析不同工艺参数对奥氏体晶粒大小的影响,揭示其消除组织遗传的机理。结果表明,在α相发生完全再结晶的条件下,进行多次降梯高温加热,晶粒更加细小均匀,可以有效切断组织遗传;多次降梯加热过程中,降温梯度、最后加热温度及加热次数均会不同程度影响奥氏体晶粒细化程度,而最后加热温度对晶粒细化起主要作用。
In this paper, the low-voltage rotor steel 30Cr2Ni4MoV as the research object, the coarse non-equilibrium tissue after a number of descending ladder heating, quenching after holding the appropriate time to analyze the different process parameters on the austenite grain size revealed its mechanism to eliminate tissue genetic . The results showed that under the conditions of complete recrystallization of α phase, multiple descending ladders were heated at high temperature and the grains were finer and more uniform, which could effectively cut off the genetic inheritance. In the process of multiple descending ladders, the temperature gradient, the final heating temperature and the heating The number will affect the degree of austenite grain refinement to varying degrees, and the final heating temperature plays a major role in grain refinement.