摘要
对Mn18Cr18N高氮钢进行不同温度下的固溶处理,通过扫描电镜SEM对组织进行观察和分析,试验结果表明热处理温度对材料的组织形态起决定性作用,在温度不低于1 150℃时,钢中奥氏体组织占绝大部分;同时在Gleeble-1500热模拟机进行热模拟试验,对Mn18Cr18N高氮钢的高温塑性进行了研究,在1 150-1 250℃时塑性最好,断面收缩率超过60%,是热加工的最佳温度区间;对高温下的断口形貌进行分析得出拉伸过程中的变形方式不仅有位错滑移,还伴有形变孪晶方式。
The metallographic structure of Mn18Cr18 N high nitrogen steel at different solid solution treatment temperature,was obsevised and analyzed by scanning electron microscopy SEM. Experimental results show that heat treatment temperature is decisive in the metallgraphic structure,when the temperature is not lower than 1150 ℃,austenitic organization accounts for the vast majority of steel. At the same time in Gleeble-1500 thermal simulator,thermal simulation test was carried out,high temperature plasticity of Mn18Cr18 N high nitrogen steel was studied,at 1150-1250 ℃,the plastic is best,section shrinkage rate was more than 60%,is the best temperature range of hot working. Analysis of fracture morphology of the high temperature tensile deformation mode in the process of not only one fault slip,accompanied by way of mechanical twin.
出处
《工业加热》
CAS
2016年第2期1-4,11,共5页
Industrial Heating
基金
"十二五"国家科技支撑计划资助项目(2012BAC27B01)
国家自然科学基金重点项目资助(51334001)
国家自然科学基金资助项目(51474024)
关键词
高氮钢
固溶处理
热塑性
断口形貌
热模拟
high nitrogen steel
solution treatment
thermoplasticity
fracture apperance
thermal simulation
