Research on the Application of Thermoelectric Potential Technology in Austenitic Heat-resistant Steel During Aging

HR3C heat-resistant steel is an important material for ultra-supercritical units. The results of the current study show that HR3C heat resistant steel suffers from a significant short term reduction in impact power under long term high temperature conditions. In this paper, through the austenitic heat-resistant steel HR3C through a long time high-temperature aging heat treatment, the results show that after high-temperature aging HR3C significant characteristics of its grain boundaries precipitation of a large number of M23C6 phase, the austenite grains will be closely wrapped, is the main cause of the HR3C impact power found to be significantly reduced. In addition, the thermoelectric potential non-destructive testing technique can better characterise the changes in the characteristics of HR3C heat resistant steel during the long term thermal ageing process and has a greater engineering application in monitoring changes in the properties of HR3C materials, affecting the results of HR3C thermoelectric potential testing in relation to the second phase produced during its thermal ageing process.