Developing Medium Carbon Superbainitic Steel

摘要：

　　To accelerate the rate of bainitic transformation in low temperature,it is effective to add Al and Co in the alloy system.The austempering temperature of 250℃is selected.With the increasing austempering time,the bainitic ferrite plates are finer,the retained austenite fraction is less and the ultimate tensile strength (UTS) is higher.When the austempering time is 6 hours,the thickness of bainitic ferrite plate is ~ 100 nm and the amount of retained austenite is 14.1 %,as well as the UTS is more than 1700 MPa,the total elongation (TEL) is above 15.0 % and the product of strength and elongation (PSE) is above 25.0 Gpa·%.In addition,according to the XRD analysis,the microstructure consists of carbide-free bainite.

关键词： bainitic transformation austempering retained austenite ultimate tensile strength

作者: YU Hao CUI Lisha SONG Chenghao

作者单位: School of Materials Science and Engineering, University of Science and Technology Beijing,Beijing 100083, China

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: 379-382

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）