Abstract: the purpose of heat treatment is to reduce the welding residual stress and improve the structure and performance of the welding joint. After the welding of the inner container, the whole heat treatment of stress relief in the furnace is required. The heat treatment process is the key process in the manufacturing process of xn3000 transport container simulation parts, while the existing heat treatment system of lanu company can only meet the heat treatment process requirements of D1 and D2 pressure vessels, and can not meet the heat treatment process requirements of xn3000 nuclear transport container, so the existing heat treatment system must be upgraded.<br>
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