Seeking advice on welding issues
Thread Content
There is 12Cr1MoV material that is to be welded using R317 electrodes. At the moment, I don’t have the means to maintain a warm environment after welding in order to reduce internal stresses. I would like to ask the experts: what are some good methods for this?
This post was last edited by lonelyghost_li on 2009-8-27 at 20:53. Stress is not eliminated through heat retention, but rather through heat treatment. In cases where post-weld heat treatment is not possible for the time being, it is necessary to carry out post-weld heating immediately after welding, followed by insulation to allow slow cooling, and then heat treatment can be performed at an appropriate time. Post-weld heating: (taking site conditions into account) Immediately after welding, use a torch for heating; employ an infrared thermometer (which resembles a small pistol and is very convenient to use), set the temperature to 200–350 degrees Celsius, and maintain that temperature for 15 minutes. After that, wrap the area with insulating material to allow it to cool down slowly to room temperature. Refer to the welding specifications for chromium-molybdenum heat-resistant steel in the petrochemical industry