刘智彪[1],2，王海燕2，高雪云2,3，吴志峰2，邹存哲2
（1. 北方联合电力有限责任公司包头第一热电厂，包头 014010；2. 内蒙古科技大学材料与冶金学院，包头 014010; 3. 广东省现代焊接技术重点实验室，广州 510650）
关键词：ZGMn13；过冷奥氏体；相变；孪晶
中图分类号：TG142.1 文献编码：A
摘要：研究高锰钢中过冷奥氏体的组织转变特征具有理论与实际意义。本文采用金相显微镜、QUANTA400环境扫描电子显微镜、JEOL-2100型透射电子显微镜对ZGMn13过冷奥氏体在高温和低温区转变产物的组织形貌进行观察。结果表明，ZGMn13钢经水韧处理后得到奥氏体组织，其中存在较多的孪晶。在珠光体转变温度和碳化物快速析出的高温区进行等温，会得到珠光体和马氏体组织，以及大量残余奥氏体和孪晶，表明Mn13钢过冷奥氏体由高温区到低温区转变分别获得单相奥氏体组织、珠光体组织和马氏体组织，该过程伴随大量孪晶和残留奥氏体生成，孪晶将奥氏体基体分割成许多区域，区域内又产生很多孪晶，对基体起到不同程度的强化作用。
The Super-cooling Austenitic Phase Transformationand Strengthening Behavior of High Manganese Steel
LIU Zhi-biao1,2，WANG Hai-yan2，GAOXue-yun2,3，WU Zhi-feng2，ZOUCun-zhe2
(1. The First Power Station of Baotou, North United Electric Power Co. Ltd., Baotou 014010, China; 2. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; 3. Key Laboratory of Modern Welding Technology ofGuangdong Province, Guangdong General Research Institute for IndustrialTechnology, Guangzhou 510650, China)
Key words: ZGMn13 steel; Super-coolingaustenite; phase transformation; twins
Abstract: Itis theoretically significant to investigate the pearlite transformation andmartensitic transformation of Mn13 steel. The optical microscope, scan electronmicroscope (SEM) and transimission electron microscope (TEM) were used toobserve the morphology and structure of the supercooling austenite product ofMn13 steel in high-temperature and low-temperature zone. The results show thataustenite and twins were obtained after water toughening treatment on Mn13 steel; pearlite and martensite were obtained whenthe steel hold isothermally in the high-temperature zone of the pearlitetransformation temperature, and a great deal of residual austensite and twincrystal were also obtained, which proves that a large number of twins areaccompanied with supercooling austenite transformation in ZGMn13 steel; and austenitematrix will be divided into many regions by twin, playing a significant role onmatrix strengthening.