Pneumatic valve surfacing electrode instructions

GB - execution Standard welding is carried out on the edge of the workpiece surface or deposited a layer of wear-resisting, corrosion resistant, heat resistant characteristics can welding metal layer. To repair and improve the service life of parts, the rational use of materials, can improve product features, cost reduction has remarkable economic benefits. When surfacing welding work and working conditions is very complex, must choose appropriate electrode according to the different requirement. Different artifacts and surfacing electrode to adopt different welding technology, to obtain satisfactory result of surfacing welding. Welding crack is the most frequently encountered problems in, to prevent the cracking of the main method is:, preheating before welding, interpass temperature control, slow cooling after welding. And for eliminating stress after welding heat treatment. , avoid multi-layer welding cracking, using low hydrogen type welding electrode. And, when necessary, the surfacing transition between welding layer and base layer ( With low carbon equivalent, high toughness characteristics of electrode) 。