Method for preventing weld fracture
AssigneeAllegheny Ludlum Steel Corporation
InventorsJack M. Beigay, Remus A. Lula
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Abstract
A method for preventing weld cracking of autogenous weldments of metastable stainless steel during deforming of the weld, as by stretching; this is achieved by cooling the weld with a pressurized CO.sub.2 spray during the deforming operation.
Claims6
A method for preventing cracking at the weld area during deformation of an autogenous weldment of metastable stainless steel, said method comprising cooling only said weld area with a pressurized CO.sub.2 spray and deforming said weld area during said cooling to form more martensite in the weld than in the base metal.
A method for preventing cracking at the weld area during stretching of an autogenous weldment of metastable AISI Type 201 or 301 stainless steel, said method comprising cooling only said weld area with a pressurized CO.sub.2 spray to a temperature of about at least 32.degree. F. and stretching said weld while at said temperature to form more martensite in said weld than in the base metal.
A method for preventing cracking at the weld area during deformation of an autogenous weldment of metastable stainless steel, said method comprising cooling only said weld area to a temperature of at least about 32.degree. F. and deforming said weld area during said cooling to form more martensite in said weld than in the base metal.
Dependencies are inferred from the claim text.