Scope of test pieces for heat treatment in welding procedure qualification
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When conducting welding procedure qualification, after preparing the stress-relief test plates, what is the coverage area for the base material? What does the transition temperature of zhg refer to?
The last edit to this post was made by wanlirn on 2022-7-22 at 16:36. The transformation temperature is AC3; for our pressure vessels, this corresponds to the normalization temperature, which ranges from 920 to 950 degrees, with slight variations depending on the material used. The stress-relief temperature is 620 degrees, and it’s necessary to follow the guidelines mentioned above； You need to pay attention to the insulation time; problems often arise in this area ；