LSAW steel pipe heat treatment methods to treat
First Skills mold plan planning should be reasonable, not too poor thickness, shape to be symmetrical with respect to large deformation mold deformation to master the rules, set aside allowance, portfolio planning on large, sophisticated messy mold can be used. For some messy precision molds can be used pre-heat treatment, aging heat treatment, quenching and nitriding to control the accuracy of the mold. When mold repair blisters, porosity, wear and other defects, selection of cold welding and other heat-affected small correction device to prevent the onset of deformation during repair.
Precision messy mold to pre-heat treatment, machining process to eliminate the remaining episodes of stress. Precision messy mold, when conditions allow, try to use cryogenic vacuum heating process and hardening after quenching. Mold hardness in ensuring the premise, try to use pre-cooling, grading cooling or quenching temperature quenching techniques.
Rational use of information. Precision messy mold material should choose a good micro-deformation of steel on steel carbide segregation serious mold should be a reasonable casting and heat treatment quenching and tempering, solution heat treatment on a large double refining and casting mold steel can not be carried out. Reasonable choice of heating temperature control heating rate, on messy precision molds can be heated slowly, preheating and other methods to reduce the mold uniform heating heat deformation.
