Heat-resistant steel castings produced deformation at room temperature or heating conditions through mechanical or manual method to correct, according to the different heating method for both cold and hot state corrected correction. Hot correction is suitable for low plasticity, high strength, have difficulty in cold correction or correction of thick large deformation heat resistant steel castings without large casting equipment. Hot straightening is divided into the overall corrective and local rectification, local heating correction is mainly suitable for wall thickness of large and medium-sized castings within 60 mm, and the plastic poor small to medium sized castings, overall rectification is mainly suitable for wall thickness in more than 60 mm large heat-resistant steel castings. Cold straightening temperature correction, applicable to simple shape, small good plastic material and wall thickness of heat resistant steel castings. General after heat treatment, cold straightening to plastic more bad of the material, correct amplitude shoulds not be too big. Cold straightening first should rectify the overall deformation, and then correct the local. When the cold straightening prone to defects.
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