马氏体不锈钢的中高温力学性能  

Medium and high temperature mechanical properties of martensitic stainless steel

作　　者：陈蕊[1] 包翠敏[1] 杨智鹏 陈炜[1] 王圣驰 林琳[1] Chen Rui;Bao Cuimin;Yang Zhipeng;Chen Wei;Wang Shengchi;Lin Lin(Shenyang Blower Works Group Corporation,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳鼓风机集团股份有限公司,辽宁沈阳110142

出　　处：《金属热处理》2022年第11期100-105,共6页Heat Treatment of Metals

基　　金：辽宁省重大专项(2020JH1/10100018)。

摘　　要：利用电子万能试验机及热膨胀仪等测试分析手段对不同热处理后的马氏体不锈钢FV520B进行中高温度段的拉伸试验、蠕变试验、线膨胀系数试验,并对试样断口进行扫描电镜观察。结果表明,FV520B钢的中高温拉伸性能较室温出现下降,当测试温度由300℃升高至500℃时,强度整体呈下降趋势,塑韧性基本保持稳定;FV520B钢经480℃时效后,在300℃测试温度及屈服强度载荷下具有很好的抗蠕变性能;测试温度在300~500℃区间内,FV520B钢的线膨胀速率呈现平缓增长趋势。Tensile test,creep test and linear expansion coefficient test of martensitic stainless steel FV520 B at medium and high temperature were carried out by means of electronic universal testing machine,thermal dilatometer and other testing and analysis methods,and the fracture of the specimen was observed by means of SEM.The results show that the tensile properties of FV520 B steel at medium and high temperatures are lower than those at room temperature.When the test temperature rises from 300℃to 500℃,the strength decreases as a whole,but the plasticity is basically stable.The FV520 B steel aged at 480℃has good creep resistance at test temperature of 300℃and load of yield strength.In the range of 300-500℃,the linear expansion rate of the FV520 B steel presents a gentle growth trend.

关 键 词：FV520B钢 中高温 拉伸性能 抗蠕变性能 线膨胀系数 

分 类 号：TG142.1[一般工业技术—材料科学与工程]