Temperature tube and steam tube welding method

The invention provides a temperature tube and steam tube welding method. The method is characterized by including the steps that first, high-chrome-nickel austenitic stainless steel welding wires or nickel base welding wires are selected as welding materials; second, the welding materials in the first step are used for forming transition layers on the parent material side of a steam tube in an overlaying mode, and the number of the transition layers is at least five; third, the welding center of the steam tube and the welding center of a temperature tube are found, and the temperature tube and the steam tube are welded together with the welding materials in the first step through electric welding. The selected welding materials meet the parent material requirement of the steam tube, the linear expansion coefficient of welding seam materials is between the linear expansion coefficient of a material of the temperature tube and the linear expansion coefficient of a material of the steam tube, and therefore the requirement for the heat crack resistance of welding joint metal and the requirement for the high-temperature performance of welded joints can be met.