摘要
以进口分接开关主驱动轴EN-GJS-700-2球墨铸铁件为研究对象,采用化学成分分析、金相试验、硬度试验、低温拉伸试验、低温冲击试验和断口微观表征技术对其组织和低温力学性能进行了分析测试,研究了低温对分接开关主驱动轴的力学性能的影响。结果表明:随着温度的降低,分接开关的屈服强度和抗拉强度小幅度升高,断后伸长率逐渐降低,其冲击功小幅度降低。不同温度对分接开关主驱动轴拉伸和冲击断口无显著影响,断口呈脆性断裂特征。
The microstructure and low-temperature mechanical properties of imported tap changer main drive shaft EN-GJS-700-2 ductile iron were analyzed and tested by chemical composition analysis, metallographic test,hardness test, low-temperature tensile test, low-temperature impact test and fracture micro characterization technology, and the effect of low temperature on the mechanical properties of the tap changer main drive shaft was studied. The results showed that with the decrease of the temperature, the yield strength and tensile strength of the tap changer increased slightly, the elongation after fracture decreased gradually, and the impact energy decreased slightly. Different temperatures had no significant effect on the tensile and impact fracture of the main drive shaft of the tap changer, and the fracture exhibited a brittle fracture characteristic.
作者
黄耀
刘海锋
程永锋
韩军科
赵子华
HUANG Yao;LIU Hai-feng;CHENG Yong-feng;HAN Jun-ke;ZHAO Zi-hua(China Electric Power Research Institute,Beijing 100192,China;Beijing University of Aeronautics and Astronautics,Beijing 100191,China)
出处
《铸造》
CAS
北大核心
2023年第1期33-37,共5页
Foundry
基金
国网公司科技项目(SGZB0000TGJS2100354)。
关键词
分接开关
球磨铸铁
低温拉伸
低温冲击
断口特征
tap changer
ductile iron
low temperature stretching
low temperature impact
fracture characteristics
