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研究了T9A钢铅浴淬火时,再辉效应对其显微组织和机械性能的影响.在珠光体转变温度范围内等温时,随着等温温度的降低,引起塑性下降的原因是再辉效应促发颗粒状或短片状珠光体形成;在上贝氏体转变温度区,由于出现再辉效应产生的温度爬升现象,使试样温度升至屈氏体转变温度区从而形成上贝氏体和屈氏体的混合组织,使得强度增高曲线出现平台或稍有下降,且塑性发生下降,同时,还对等温淬火的定义提出了新的看法,绘出了反映实际情况的共析钢C-曲线上的组织形成图。
The effect of the rebounding effect on the microstructure and mechanical properties of the T9A steel during lead-bath quenching was studied.When the isothermal temperature in the pearlite transformation temperature was decreased, Hair grainy or short pearlite formation; in the upper bainite transformation temperature zone, due to the phenomenon of refractor temperature rise phenomenon, so that the specimen temperature rose to the temperature of the metostatite transition zone to form upper bainite and flexor The mixed microstructure of martensite makes the strength increasing curve appear on the platform or slightly decreases and the plasticity declines. At the same time, a new view on the definition of isothermal quenching is also presented, and the eutectoid steel C-curve reflecting the actual situation is drawn The formation of the organization chart.