How to perform heat treatment after surfacing the inner wall of 16MnR containers with stainless steel
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How should heat treatment be carried out after welding stainless steel to the inner wall of a Q345R (16MnR) vessel? ——Design pressure 6.5 MPa, operating temperature 280 degrees Celsius, Class III vessel
Containers made of cladded stainless steel can be manufactured without heat treatment; otherwise, it will definitely affect their corrosion resistance. If it must be done, it is best to carry out heat treatment after welding the transition layer, then weld the corrosion-resistant layer, and avoid further heat treatment.
It’s all done – the transition is complete, heat treatment has been carried out, and the covering has been applied. Heat treatment must not be performed; otherwise you’ll regret it forever
Personally, I think heat treatment at a temperature equivalent to that of normalizing is preferable; for austenitic stainless steels, this is equivalent to stabilization heat treatment as well.
I agree with you; the ball seal of the urea synthesis tower at Nanjing Dahuajie in the 1980s had electrode cladding but no heat treatment. The base material itself is normalized steel plate.