Influence of cold straightening on the mechanical and service properties of 30KhMA steel cylinders
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Cold deformation on a press may be used for correcting the geometry of cylinders rejected after heat treatment for increased out-of-round.
Cylinders of 30KhMA steel subjected to cold deformation on a press to correct out-of-round must be retempered at 540–560°C.
After cold straightening on a press with subsequent tempering cylinders possess a high actual strength safety factor and resistance of the material to brittle fracture at low temperatures (T50≤−70°C) and also a sufficient reserve of toughness, low sensitivity to a notch, and resistance to failure development in the whole range of operating temperatures, which characterizes their high service reliability.
KeywordsHeat Treatment Brittle Operating Temperature Brittle Fracture Safety Factor
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