摘要
以两种碳含量为1.0wt%的超高强贝氏体钢为研究对象,采用热处理、金相法、拉伸和冲击试验等,研究了合金元素Co和Al对超细高强贝氏体钢相变量和组织性能的影响。此外,设置了两种不同的等温淬火温度,分析了等温温度对高碳贝氏体钢相变和组织性能的影响。结果表明：在热处理工艺条件相同的前提下,合金元素Co和Al的添加促进了等温贝氏体相变,获得更多的超细贝氏体板条,从而明显改善了贝氏体钢的力学性能。对于高碳贝氏体钢,当相变时间较短时,贝氏体转变量随着相变温度的升高而逐渐增加,同一高碳贝氏体钢的强塑积随着相变温度的升高而增加。
Effects of alloying elements Co and Al on transformation and microstructure and properties of two ultra high strength bainitic steels with carbon content of 1.0 wt% were studied by means of heat treatment,metallographic analysis,tensile and impact tests.In addition,two different isothermal transformation（ austempering） temperatures were set to analyze the effect of holding temperature on transformation and microstructure of high carbon bainite steel.The results show that under the same heat treatment conditions,the addition of alloying elements Co and Al promotes the isothermal bainite transformation and obtains more ultrafine bainite lathes,which improve the mechanical properties of bainite steel obviously.For high carbon bainite steel,when the transformation time is short,the bainite transformation increases gradually with the increase of transformation temperature,and the strength-plasticity product of the same high carbon bainite steel increases with the increase of transformation temperature.
作者
宋昭
文艺贝
张琪
黄煜博
田俊羽
徐光
Song Zhao;Wen Yibei;Zhang Qi;Huang Yubo;Tian Junyu;Xu Guang(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第10期10-13,共4页
Heat Treatment of Metals
基金
国家自然科学基金面上项目(51874216,51274154)
国家自然科学基金青年项目(51704217)
湖北省技术创新重大项目(2017AAA116)
武汉科技大学大学生科技创新基金研究项目
河北省钢铁联合基金(E2018318013)
关键词
CO
AL
超高强贝氏体钢
超细贝氏体
等温淬火温度
组织
性能
Co
Al
ultrahigh-strength bainitie steel
uhrafine bainite
austempering temperature
microstructure
mechanical properties
