抄録
The tensile properties and isothermal and thermal fatigue life at high temperatures were measured on the centrifugal casting HK40, which had been used for chemical plants at high temperature for a long time. The results obtained showed that these properties have a tendency to increase a little at higher temperature than 700°C, as the material is aged by using for a Long time.
Further, it is found that the area of cyclic σ-ε hysteresis loop and fracture tensile strain can be used to predict the isothermal fatigue life, and that the thermal fatigue life is nearly equal to the isothermal fatigue life at the maximum temperature.
