Research and Application of Nickel-base Alloy Overlaying Technology in Gasifier Pipe Screens

Through specific process test, it is validated that the chemical composition and comprehensive mechanical properties of the surfacing layer meet the requirements of EN specification, and the resistances to intergranular corrosion also meet the technical requirements of the equipment. The weld formation has good process performance, and effectively reduces welding deformation. Three kinds of welding process methods have been applied to the manufacture of large-area welding pieces of pipe screens inside the gasifier, which solved large-area nickel-based overlaying technical problems of the gasifier pipe screens.