Explosive welding and postweld heat treatment method for ferrite martensite heat-resistant steel

The invention provides an explosive welding and post-weld heat treatment method for ferrite martensite heat-resistant steel, which comprises the following steps of: placing a to-be-bonded surface of a base plate on a welding platform upwards, and placing a to-be-bonded surface of a compound plate on the to-be-bonded surface of the base plate downwards at an inclination angle of 6-8 degrees; placing the explosive box filled with the explosive on the upper surface of the compound plate, igniting the detonating device, combining the to-be-combined surfaces of the base plate and the compound plate by utilizing the explosion of the explosive to obtain a ferrite martensite heat-resistant steel welded plate, placing the ferrite martensite heat-resistant steel welded plate in a furnace body with the temperature of 950-1100 DEG C for heat preservation for 30 minutes, then placing the ferrite martensite heat-resistant steel welded plate in a furnace body with the temperature of 750 DEG C for heat preservation for 90 mi