摘要
对不同层间温度下690 MPa级HSLA钢熔敷金属进行室温拉伸试验,探讨晶粒尺寸对熔敷金属屈强比的影响规律。应用电子背散射衍射技术统计熔敷金属的有效晶粒尺寸。结果表明:层间温度的降低使熔敷金属的屈强比升高,层间温度从200℃降低到80℃,屈强比由0.781增加到0.82。进一步研究表明:随着层温的降低,组织细化是屈强比升高的主要原因。
690 MPa level HSLA steel at different interpass temperature is tested by tensile test machine at room temperature, the influence of the grain size on the yield ratio of deposited metal is discussed. Effective grain size of deposited metal is analysed by EBSD.The results indicate that with decease of interpass temperature the yield strength ration rises,interpass temperature decreases from 200℃ to 80℃ ,corresponding yield strength ration increases from 0.781 to 0.82. With interpass temperature decrease,grain refinement is the important reason to rise of yiled strength ration.
出处
《电焊机》
2015年第7期97-100,共4页
Electric Welding Machine
基金
国家973重点基础研究发展计划项目(2010CB630800)
关键词
熔敷金属
屈强比
晶粒尺寸
deposited metal
yield strength ratio
grain size
