QT400高温低周疲劳性能试验研究  

Experimental Study on QT400 Low Cycle Fatigue Performance at High Temperature

作　　者：张小伍[1] 马新博[1] 王丽艳[1] 田宇[1] 李海霞[1] Zhang Xiaowu;Ma Xinbo;Wang Yanli;Tian Yu;Li Haixia

机构地区：[1]哈尔滨汽轮机厂有限责任公司,黑龙江150046

出　　处：《大型铸锻件》2020年第5期20-22,共3页Heavy Casting and Forging

摘　　要：对QT400材料400℃以下不同温度的拉伸性能和300℃下不同应变幅值的低周疲劳性能进行了试验,得到了不同温度下QT400拉伸性能的变化特性,球形石墨的断口形貌微观特征,以及低周疲劳Ramberg-Osgood参数和Manson-Coffin参数,为汽缸的结构设计和强度计算提供了技术支持。The tensile properties of QT400 at different temperatures below 400℃and the low cycle fatigue properties of different strain amplitudes at 300℃have been tested.The variation characteristics of QT400 tensile properties at different temperatures,the microstructure characteristics of the fracture surface of spherical graphite,and the Ramberg-Osgood parameters and Manson-Coffin parameters of low cycle fatigue have been obtained,which can provide technical support for the structural design and strength calculation of the cylinder.

关 键 词：QT400球墨铸铁 低周疲劳 应变控制 

分 类 号：TG111.8[金属学及工艺—物理冶金]