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本文研究了W9Mo~3Cr~4V钢的热变形奥氏体动态再结晶规律。结果表明:由于形变诱发析出碳化物的影响,W9Mo~3Cr~4V钢热变形奥氏体动态再结晶方式与低碳低合金钢的晶界弓出机构和晶界生核机构不同,是通过亚晶合并形成再结晶晶粒的,即亚晶合并机构。当形变速率较低时,可由亚晶粒直接形成再结晶晶粒。形变温度和形变速率对W9Mo~3Cr~4V钢热变形奥氏体动态再结晶影响比较复杂,不能简单地用Z参数来统一描述。
In this paper, the dynamic recrystallization rules of hot deformation austenite of W9Mo ~ 3Cr ~ 4V steel were studied. The results show that the dynamic recrystallization of W9Mo ~ 3Cr ~ 4V steel is different from that of low carbon and low alloy steels due to the influence of deformation induced carbides. Crystals merge to form recrystallized grains, ie, subgrain mergers. When the deformation rate is low, recrystallized grains can be formed directly from the subgrains. Deformation temperature and deformation rate of W9Mo ~ 3Cr ~ 4V steel hot deformation austenite dynamic recrystallization more complex, can not be simply used to describe Z uniform parameters.