The invention belongs to the technical field of advanced
processing for superalloys, and relates to a preparation method for a wrought
superalloy fine-grain bar. The preparation method for the wroughtsuperalloy fine-grain bar comprises the following steps:
raw material preparation,
vacuum induction furnace smelting, vacuum self-consuming re-melting, high-temperature
diffusion homogenizing annealing, upsetting and blank preparation, thermal sheathing,
sand blasting for a sheathed blank, glass
lubricant brushing,
extrusion preparation for a bar material, and sheath removal. According to the preparation method for the wrought
superalloy fine-grain bar, an upsetting process and an
extrusion cogging process are organically combined, and a small-specification
ingot case is innovatively adoptedfor preparing the large-specification bar, so that the problems of high process deformation difficulty and difficulty to process and form, of the material, are solved; the bar is fine and uniform in
grain structure; the produced complex alloyed wrought
superalloy bar product is high in quality, and ideal in
microstructure control; the
mechanical property is enhanced and improved; and high materialqualification rate and remarkable economical benefits are achieved.