摘要
采用一种新的循环淬火和奥氏体逆相变(CQ-ART)热处理工艺,通过调整自制移动式伞型跨越架桁架用中锰钢中残留奥氏体含量及稳定性,以获得良好的力学性能。研究表明,采用CQ-ART工艺,在Fe-0.25C-3.98Mn-1.22Al-0.20Si-0.19Mo-0.03Nb(wt%)中锰钢中获得了大量的残留奥氏体;经两次循环淬火和ART热处理后,自制合金的综合性能最佳,其极限抗拉强度为838 MPa,总伸长率为90.8%,强塑积为76.1 GPa·%,奥氏体体积分数约为62%;快速加热循环淬火由一次增加至两次,残留奥氏体的含量和稳定性增加。采用CQ-ART工艺处理后的自制移动式伞型跨越架桁架用中锰钢具有优异的综合力学性能,可显著提高输电线路跨越施工过程安全性。
A new cyclic quenching and austenite reverse phase transformation(CQ-ART)heat treatment process was adopted to obtain better mechanical properties by adjusting the retained austenite content and stability of the medium manganese steel used for the self-made mobile umbrella type crossing frame truss.The results show that a large amount of retained austenite is obtained in the Fe-0.25C-3.98Mn-1.22Al-0.20Si-0.19Mo-0.03Nb(wt%)medium manganese steel by CQ-ART process.After two cycles of quenching and ART heat treatment,the alloy obtains the best comprehensive properties,with ultimate tensile strength of 838 MPa,total elongation of 90.8%,product of strength and plasticity of 76.1 GPa·%,and the volume fraction of austenite is about 62%.The content and stability of retained austenite increase when the rapid heating cycle quenching is increased from one to two cycles.The medium-manganese steel used for the self-made mobile umbrella type crossing frame truss treated by the CQ-ART process has excellent comprehensive mechanical properties,which can significantly improve the safety of the transmission line crossing construction process.
作者
刘敏
徐碧玉
甘利红
刘帆
刘胤辰
张阳
冯波
刘春泉
Liu Min;Xu Biyu;Gan Lihong;Liu Fan;Liu Yinchen;Zhang Yang;Feng Bo;Liu Chunquan(Xianning Power Supply Company of State Grid Hubei Electric Power Co.,Ltd.,Xianning Hubei 437000,China;Hubei Xiangcheng Intelligent Electromechanical Research Institute Co.,Ltd.,Xianning Hubei 437000,China;Institute of Engineering and Technology,Hubei University of Science and Technology,Xianning Hubei 437000,China;School of Materials Science and Engineering,Hunan Institute of Technology,Hengyang Hunan 421002,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第12期110-115,共6页
Heat Treatment of Metals
基金
湖北省自然科学基金青年面上项目(2021CFB009)
湖南省自然科学基金(2023JJ50108)
湖北省支持企业技术创新发展项目(2021BAB064)
湖南省科技人才托举工程项目“小荷”科技人才专项(2023TJ-X10)
湖南工学院青年自科培育项目(2022HY007)
衡阳市科技计划(202121014479)。
关键词
跨越架
中锰钢
循环淬火
显微组织
力学性能
crossing frame
medium manganese steel
cyclic quenching
microstructure
mechanical properties
作者简介
刘敏(1970-),男,高级工程师,主要研究方向为电力系统规划、输变电工程施工及变电设备运行等,E-mail:1257693270@qq.com;通信作者:张阳,高级工程师,博士,E-mail:845786298@qq.com。
