国产超临界汽轮机转子钢低周疲劳特性的试验研究  

Experimental Study on Low-cycle Fatigue Properties of Domestic Supercritical Turbine Rotor Steels

作　　者：吕方明[1] 王坤[1] 黄树红[1] 欧阳坤贝 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074 [2]中国轻工业长沙工程有限公司,长沙410114

出　　处：《动力工程学报》2013年第8期653-658,共6页Journal of Chinese Society of Power Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA04Z404);国家重点基础研究发展计划(973计划)资助项目(20098CB219803);国家自然科学基金资助项目(50505013;51021065;50975105)

摘　　要：为了解国产超临界汽轮机转子钢的静拉伸性能和低周疲劳特性,在540℃和593℃温度下对5种国产超临界汽轮机转子钢进行了静拉伸试验和总应变控制低周疲劳试验,给出了汽轮机转子钢的静拉伸力学性能参数,并拟合出其应变-疲劳寿命关系式.结果表明:在经过540℃和593℃低周疲劳试验后,5种转子钢的维氏硬度分别下降了约15和20,试验用超临界汽轮机转子钢均具有明显的循环软化特性.To study the static tension and low-cycle fatigue properties of domestic supercritical turbine rotor steels, monotonic tensile tests and total strain-controlled low cycle fatigue tests were carried out to 5 domestic supercritical turbine rotor steels respectively at 540 ℃ and 593 ℃, after which corresponding mechanical properties and strain-life formulas were obtained based on the tests data. Results show that the Vickers hardness of the five rotor steels has reduced by about 15 at 540 ℃ and 20 at 593 ℃, indicating an obvious cyclic softening behavior.

关 键 词：超临界机组 汽轮机转子 低周疲劳 静拉伸性能 高温 硬度 

分 类 号：TG135[一般工业技术—材料科学与工程]