Multifunctional cold and hot fatigue testing machine

The utility model relates to a multifunctional cold and hot fatigue testing machine, which comprises a support frame, a protection cabinet, a high-frequency induction heating power supply, a mechanical and thermal fatigue test bed and a molten aluminum fatigue test bed, the mechanical and thermal fatigue test bed comprises a screw elevator, a test piece tool, an infrared temperature measuring device, a test piece induction heater and a water spray cooling ring, and the test piece tool is used for installing a test piece. The screw elevator is used for loading pressure or pulling force to a test piece, the test piece induction heater is arranged around the test piece, the water spraying cooling ring is fixed below the test piece induction heater, the infrared temperature measuring device is arranged around the test piece, and the high-frequency induction heating power supply is connected with the test piece induction heater. The device has the beneficial effects that constant-temperature high-frequency cyclic