The invention relates to a method for
welding martensite heat-resistant steel, and belongs to the field of high-parameter container manufacturing. For solving the problems that the closed seam weldingconstruction of the high-parameter container
martensite heat-resistant steel used in a secondary reheating unit is prone to occur the conditions of crack defect, post-
welding low
hardness and the like, the method comprises the following steps that 1, a
welding groove is machined; 2, pre-welding
predation is performed; 3, pre-welding is preheated; 4,
argon is filled; and 5, welding is performed; if a
barrel body is too large, a weld joint is too long, an interlayer temperature is difficult to control, and then a
flame heating temperature compensator is adopted to heated in a following mode soas to compensate for temperature loss, if the volume of the
barrel body is too large, root oxidation cannot be prevented by establishing a large-scale closed
gas protection chamber, and then a specialargon
gas protection device is adopted for protection; and in the
welding process of the high-
alloy steel thick-wall container
barrel body, the
welding joint is heated in a
flame preheating mode, thechange condition of the temperature is difficult to continuously measure, and a
temperature monitoring device is arranged at the front end of the to-be-welded weld joint of the container barrel body.According to the method, the number of
rework times and the probability can be reduced.