Method for correcting deformation of welding part of nozzle casting

The invention provides a method for correcting deformation of a welding part of a nozzle type casting, relates to the field of deformation correction of investment precision castings, and aims to solve the problems that the correction heat affected zone of the nozzle type casting is large and the correction effect cannot be rapidly detected and carry out correction in combination with the heating characteristic of acetylene-oxygen. Rapid detection of the correction effect of the nozzle type welding part and resistance to reversible deformation can be achieved, and meanwhile the problems that deformation of the nozzle type welding part is difficult to correct and detect, and the heating range is difficult to determine are solved; by means of the correcting method, the qualification rate and correcting efficiency of the nozzle type welding parts can be improved, the product quality requirement can be met, and meanwhile the requirement for rapid assembly in production is met. The invention solves the problem tha