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通过对ZGMn13进行多元合金化和凝固过程工艺控制,力求直接在铸态下获得理想的全奥氏体组织。采用消失模负压实型铸造工艺制备铸态高锰钢试样,借助光学显微镜、X射线衍射仪(XRD)、能谱分析仪和硬度测试仪等检测设备,分析了合金化前后铸态高锰钢凝固组织特征。结果表明,当合金元素添加量为0.33Cr-0.38Mo-0.06V-0.05Ti-0.66Ni时,凝固组织中只有部分碳化物析出;当合金元素添加量达到0.72Cr-0.70Mo-0.14V-0.13Ti-1.23Ni时,高锰钢在铸态下获得了全奥氏体组织;随合金元素加入量的进一步增加,铸态凝固组织均为全奥氏体组织。奥氏体晶粒度随合金元素加入量的增加而减小,硬度随合金加入量的增加而增加。
Through the ZGMn13 multi-alloying and solidification process control, and strive to obtain the ideal in the as-cast all-austenite ideal. The as-cast high manganese steel samples were prepared by the lost foam die negative pressure casting technique. The microstructures of as-cast high manganese steel before and after alloying were analyzed by means of optical microscope, X-ray diffraction (XRD), energy spectrum analyzer and hardness tester Manganese steel solidification characteristics. The results show that only a part of the carbides are precipitated in the solidified structure when the alloying additions are 0.33Cr-0.38Mo-0.06V-0.05Ti-0.66Ni. When the alloying addition reaches 0.72Cr-0.70Mo-0.14V-0.13 Ti-1.23Ni, high manganese steel obtained in the as-cast state of the whole austenite; with the addition of alloying elements to further increase the cast solidified structure are all austenitic. The austenite grain size decreases with the addition of alloying elements, and the hardness increases with the addition of alloying elements.