Welding method for temperature pipe and reheat cooling section pipe

The invention provides a welding method for a temperature pipe and a reheat cooling section pipe. The welding method is characterized by comprising the steps that firstly, high chromium nickel austenitic stainless steel welding wires or nickel-based welding wires are adopted as welding materials; secondly, at least two transition layers are formed in a bead weld mode on the parent metal side of the main reheat cooling section pipe through using welding materials selected in the first step; welding centers of the reheat cooling section pipe and the temperature pipe are found, and the temperature pipe and the reheat cooling section pipe are welded together through electric welding of the welding materials selected in the first step. The selected welding materials meet the requirements of parent metal of the main reheat cooling section pipe, the coefficient of linear expansion of welding seam materials is within the range of the coefficient of linear expansion of materials of the temperature pipe and the reheat cooling section pipe, and therefore the requirement for the heat crack resisting performance of welding seam metal and the high temperature performance of a welding connector can be met.