Influence of Pre-austenitizing Temperature on Mechanical Property and Microstructure of TRIP Steel with Annealing Martensite

摘要：

　　This paper investigates the influence of austenitization temperature on the microstructure and mechanical properties of a TRIP steel (TAM steel) containing annealed martensite.The steel was produced using a three-stage heat treatment,i.e.austenitization,intercritical annealing and isothermal bainitic transformation.The mechanical properties were determined using a tensile test machine,showing that,the TRIP steels with annealed martensite have excellent elongation as well as strength and elongation balance,especially when the austenitization temperature is 950℃,the elongation of the steel is over 40%,and the strength and elongation balance is over 27 GPa·%.The microstructure was characterized using scanning electron microscopy (SEM),transmission electron microscope (TEM),showing that the steels consist of ferrite,banite,retained austenite and annealed martensite.The austenitization temperature has strong influence on the fraction of annealed martensite and grain size of the ferrite.

关键词： TRIP steel austenitization temperature microstructure mechanical properties annealed martensite

作者: DING Wei LI Yan DU Jingchao GONG Zhihua

作者单位: School of Materials and Metallurgy, Inner Mongolia University of Science and Technology,Baotou 01401 Bayan Obo Multimetallic Resource Comprehensive Utilization Key Lab, Inner Mongolia University of Sci School of Materials and Metallurgy, Inner Mongolia University of Science and Technology,Baotou 01401

会议类型: 国际会议

会议名称: the 1st International Conference on Automobile Steel & The 3rd International Conference on High Manganese Steels (第一届国际汽车用钢大会暨第三届高锰钢国际会议)

会议地点: 成都

会议语种:英文

页码: 442-445

在线出版日期: 2016-11-16（万方平台首次上网日期，不代表论文的发表时间）