Regarding post-weld heat treatment
Thread Content
What is the purpose of post-weld heat treatment?
1. Relieve welding residual stresses. 2. Stabilize the shape and size of the structure, reducing distortion. 3. Improve the properties of the base material and weld joints, including a. enhancing the plasticity of the weld metal. b. Reduce the hardness of the heat-affected zone. c. Improve fracture toughness. d. Improve fatigue strength. e. Restore or increase the yield strength reduced during cold forming. 4. Improve resistance to stress corrosion. 5. Further release harmful gases from the weld metal, especially hydrogen, to prevent the occurrence of delayed cracks.
Relieves welding residual stresses, stabilizes the shape and size of the structure, reduces deformation, and improves the properties of the base material and welded joints.
e. Restore or increase the yield strength reduced during cold forming. After cold forming, it seems that the strength has increased – is there an increase in tensile strength and a decrease in yield strength?
1. Stress relief； 2. Improve mechanical properties ； 3 Recovery of mechanical properties
May I ask what is the specific heat treatment process for carbon steel pipes of 426*10? We have such a pipe on site; the medium flowing through it is liquid ammonia, and stress corrosion occurs. Heat treatment is necessary, but the standard specifications do not provide specific guidelines for the heat treatment of carbon steel
May I ask what is the specific heat treatment process for carbon steel pipes of 426*10? We have such a pipe on site; the medium flowing through it is liquid ammonia, and stress corrosion occurs. Heat treatment is necessary, but the standard specifications do not provide specific guidelines for the heat treatment of carbon steel
The purpose of post-weld heat treatment should be summarized...
Purpose of post-weld heat treatment: to remove hydrogen, eliminate welding stresses, and improve the microstructure and overall properties of the weld.