塑性变形诱发相变对回火球墨铸铁组织和性能的影响

• 作 者: 杨舒文 侯泽北 邱铖铖
• 机 构: 武汉理工大学物流工程学院,武汉理工大学航运学院,武汉理工大学能源与动力工程学院,
• 出 处: 热加工工艺
• 发表日期: 2017年09期
• 关键词: 压缩应变 残余奥氏体 万能拉伸试验机 针状铁素体 微观组织 硬度计 双相组织 试验研究 衍射仪 回火处理

对回火球墨铸铁进行了塑性变形诱发相变的试验研究,采用电子显微镜、X-ray衍射仪进行了微观组织观察,并采用硬度计和万能拉伸试验机进行了力学性能测试,分析了不同塑性变形量对球墨铸铁组织性能的影响。结果表明:回火球墨铸铁经正向压缩应变时会产生相变现象,残余奥氏体转变为马氏体。当压缩应变量为8%时,奥氏体含量由原来的32.6%减少为22.7%。马氏体含量增多,材料的硬度增加,冲蚀性能提高。

The tempering ductile iron was subjected to plastic deformation-induced phase transition test, the use of electron microscopy, X-ray diffraction microscopy observations, and the use of hardness tester and universal tensile testing machine mechanical properties were tested, the analysis of different Effect of Plastic Deformation on Microstructure and Properties of Ductile Iron. The results show that the phase transformation occurs when the tempering ductile iron is subjected to normal compressive strain, and the retained austenite changes to martensite. When the compressive strain is 8%, the austenite content is reduced from 32.6% to 22.7%. Increasing the amount of martensite, the hardness of the material increases erosion performance.