复合合金化对奥氏体中锰钢切削加工性的影响及切削加工性的模糊综合评判  

Effects of composite alloying on machinability of austenitic medium manganese steel and fuzzy comprehensive evaluation of machinability

作　　者：金瑞 任志英[1,2,3] 白鸿柏 杨洋洋 张宇杰 Rui JIN;Zhiying REN;Hongbai BAI;Yangyang YANG;Yujie ZHANG(Fuzhou University,School of Mechanical Engineering and Automation,Fuzhou,Fujian 350108,China;Military Engineering Innovation Center for Knitted Wire Mesh of Fujian Province,Fuzhou,Fujian 350108,China;Tribology Institute of Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108 [2]福建省金属橡胶军工创新工程行业技术开发基地,福建福州350108 [3]福州大学摩擦学研究所,福建福州350108

出　　处：《过程工程学报》2018年第5期1037-1044,共8页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51375094);河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室开放基金资助项目(编号:201802)

摘　　要：在传统奥氏体中锰钢中添加不同含量的合金元素Mo, Cr, Nb和RE进行复合合金化处理,测试了其导热性及切削加工性,研究了复合合金化对奥氏体中锰钢切削加工性的影响,建立了二级模糊综合评判模型,以奥氏体锰钢的硬度、抗拉强度、延伸率、冲击韧性和热导率作为影响因素,对切削加工性进行定量分析.结果表明,复合合金化处理可一定程度上改善奥氏体锰钢的切削加工性,合金元素Mo, Cr和Nb含量分别为1.87wt%, 2.43wt%和0.059wt%时试样的刀具后刀面平均磨损宽度VB值比未经合金化处理的ZGMn13钢减少了14.3%.用二级模糊综合评判模型对奥氏体锰钢的切削加工性进行评价,通过本模型获得的评价指标与刀具磨损实验获得的VB值相关性显著,相关系数为–0.87334,存在高度的线性负相关,评判结果与VB值基本一致,评判模型符合生产实际,结果准确有效.Austenitic manganese steel has been widely used in various fields as wear-resisting material, but it belongs to the typical difficult-to-machine material with extremely poor cutting performance, which limites the scope of its application to a large extent. The composition of traditional austenite medium manganese steel added with Mo, Cr, Nb and RE to combine alloying treatment was studied. The thermal conductivity and machinability of prepared manganese alloy in the austenite was tested. The effect of composite alloying on machinability of austenitic manganese steel was explored. A second-level fuzzy comprehensive evaluation model to quantitatively analyze machinability with the austenitic manganese steel hardness, tensile strength, elongation, impact toughness and thermal conductivity as influencing factors was established. The results showed that the composite alloying treatment can improve machinability of austenitic manganese steel to a certain extent when contents of alloying elements Mo, Cr, Nb were 1.87 wt%, 2.43 wt% and 0.059 wt%, the tool flank wear width（VB value） of the sample reduced by 14.3% compared to the non-alloyed ZGMn13. The correlation between the evaluation index obtained by the two-level fuzzy comprehensive evaluation model and the VB value obtained by the tool wear experiment was significant. The linear correlation coefficient was –0.873 34, which indicated a high degree of linear negative correlation, and the result was generally consistent with the VB value. In this way, it is proved that the evaluation model adopted was in line with actual production, and the evaluation result was accurate and effective.

关 键 词：奥氏体中锰钢 复合合金化 切削加工性 VB值 模糊综合评判 

分 类 号：TQ921[轻工技术与工程—发酵工程]