Understanding post-weld slow cooling, post-weld dehydrogenation, and post-heating
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After the container welding is completed, how do people understand and implement the concepts of post-weld slow cooling, post-weld hydrogen removal, and post-heating?
From the perspective of process evaluation, only pre-welding heating and post-weld heat treatment are the two important factors that affect the properties of the welded joint, while post-weld heat treatment is not an important factor. Moreover, the effects of post-weld slow cooling and degassing treatment can be fully covered by post-heating. Post-weld slow cooling: primarily reduces the cooling rate of the welded joint, thereby minimizing the likelihood of the formation of hardened structures. Post-weld dehydrogenation: Heating or using insulation to retain the residual heat after welding, in order to allow the diffused hydrogen in the weld to escape ； Post-weld heat treatment: Maintaining the welded joint at a certain temperature through heating. Its effect is the sum of the first two.