奥氏体变形对超级贝氏体相变和组织的影响
Effects of Ausforming on Superbainite Transformation and Microstructure
徐光，邓鹏，邹航，补丛华
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作者单位：武汉科技大学材料与冶金学院
武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室
中文关键字：超级贝氏体；奥氏体变形；低温等温转变；组织
英文关键字：Superbainite; Ausforming; Low temperature isothermal transformation; Microstructure
中文摘要：设计、冶炼炉一种Fe-Mn-Si系超级贝氏体钢，在Gleebe-1500热模拟实验机上研究了奥氏体变形对低温贝氏体相变和组织的影响。结果表明，奥氏体变形对超级贝氏体组织形貌有很大的影响；奥氏体高温变形缩短贝氏体相变孕育期，但阻滞贝氏体相变体积分数；奥氏体低温变形大大缩短贝氏体相变孕育期，明显促进贝氏体相变过程，转变后贝氏体组织呈现明显的纤维状变形组织特征。
英文摘要：A super-bainite steel of Fe-Mn-Si grade was designed and refined in laboratory. The effects of ausforming on superbainite transformation at low temperature and microstructure were studied through Gleebe-1500 hot simulator. The research results indicate that morphology of superbainite microstructure is greatly influenced by ausforming, the bainite valume fraction is reduced by high temperature ausforming at 860℃ although incubation time of transformation is shortened, and both incubation time of transformation and transformation volume fraction are greatly promoted by low temperature ausforming at 300℃. The microstructure shows the obvious deformed fibre-shape characteristic.