Flame welding of A387GR22-C11 heat-resisting steel

A387GR22-C11 heat-resisting steel boiler flue hood material for heat-resistant alloy steel, A387GR22-C11 steel grade, the poor welding performance, preheating before welding requirements, according to the customer's actual situation, decided not to use the electric heating plate preheating requested, and take the flame preheating, postweld heat preservation and reasonable welding parameters, welding quality.

The chemical composition of A387GR22-C11 heat-resisting steel:

The cigarette cover component welded by the welding process is tested by PT according to JB6062-92 standard, the qualified rate is 99.7%, the welding quality is good, and the welding cost is lowered. Practice has proved that it is feasible to process the flame preheating and the heat after flame and the corresponding technological parameters.