Four, heating: 1. There are grooves of the blind hole machining, casting and welding parts and stainless steel workpiece, should not be commonly in the salt bath furnace heating 2. Workpiece heating should have enough heat preservation time, according to the condition of effective thickness of workpiece and thickness (multiplied by the actual thickness workpiece shape factor) reference table 5-16 and table 5-17 to calculate Five, cooling: 1. Air cooled, martensite stainless steel heat resistant steel should be scatter in a dry place 2. The martensitic stainless steel and heat resistant steel quenching cooling to room temperature before cleaning, cryogenic treatment can be performed or tempering 3. The artifacts should be promptly tempering after quenching, the time interval should not be commonly more than 4 h, artifacts used carbon content (mass fraction) of carbon steel is low, the shape is simple and should not be more than 16 h 4. Composed of martensite stainless steel and heat resistant steel welding assembly, welding and subsequent heat treatment time between should not be more than 4 h.