Analysis of thermal-mechanical characteristics and metallographic detection of broken connection of transmission line

In order to study the thermal mechanical characteristics of the broken line of the connecting pipe and pipeline joint of the transmission line, the tensile test of the steel cored aluminum strand steel wire, the thermodynamic analysis of the broken line joint of the connecting pipe and the metallographic test of the steel core of the broken line joint were carried out successively. The tensile strength of the steel core of the steel cored aluminum strand, the temperature load curve at different times and the metallographic test results of the steel core of the broken line joint were obtained, Finally, the exposed section of steel core is tested by metallography. The results show that the tensile strength of steel cored aluminum strand meets the standard, the heating of connecting pipe caused by conductor current will affect the calculated breaking force of steel core, and the exposed section of steel core has been running at high temperature for a period of time before being pulled off.