I have a weld procedure which the manufacturer of valves wants to use as a repair procedure for contingency purposes for 25% Super duplex casting.The procedure conducts solution annealing after welding. I think , for repair (allowing minor repair only,no more than 25% of wall thickness , not more than 10% of total surface area), localised solution annealing (1120 C) is neither possible nor desirable (more chances to form embrittle precipitates in the surrounding region). So the best solution is to weld (which will raise to temperature greater than 1120 anyways) the repair , followed by water quenching after completion of welding.
Please correct me if I am deviating form the facts.
Secondly, the proposed WPS shall be rejected as PWHT is not carried out in minor repair of 25 Cr Castings.
Your prompt response in this regard would be much appreciated.
Best regards
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