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Method for repairing component by welding and its repaired component

A welding repair and component technology, applied in the field of metal alloys, can solve problems such as difficulty in controlling the ratio of filler material to base metal

Inactive Publication Date: 2004-08-04
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using ductile filler materials to repair superalloy components, the problem encountered is that it is difficult to control the ratio of filler material to base metal in manual welding processes such as TIG welding

Method used

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  • Method for repairing component by welding and its repaired component
  • Method for repairing component by welding and its repaired component
  • Method for repairing component by welding and its repaired component

Examples

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Embodiment Construction

[0013] Figure 1 to Figure 5 shows the pair as figure 2 A sequence of repair steps for a defective part 10 is shown. Component 10 may be fabricated from a variety of metal alloys, including those that are relatively difficult to weld, such as nickel, cobalt, and iron-based superalloys used in the manufacture of gas turbine castings and forgings. If the component 10 is a casting, the defects 12 are usually point defects, such as ceramic inclusions, pores, etc., and sometimes the point defects may be replaced by line defects.

[0014] The first step of the present invention is described below, figure 1 Shown is a surface 24 of a metal alloy body 20 heated by a torch 22 produced by a TIG welder 23 such that a weld puddle 26 is created. It is expected that the molten metal pool 26 gradually expands radially outwardly and downwardly through the body 20 along the molten pool front 28 over time from the point closest to the welding torch 22 . The final size and shape of the weld...

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Abstract

A method of repairing a metal alloy component, and the resulting repaired component. The method involves machining the component surface to remove a defect, and then placing in the resulting surface cavity a filler insert whose size and shape are predetermined so that the welding operation can be carried out to completely melt the insert while minimizing the melting of the component immediately surrounding the insert. As such, minimum mixing occurs between the materials of the insert and the component, thereby reducing the risk of cracking following the welding operation.

Description

technical field [0001] The present invention generally relates to a method of welding and repairing metal alloys, especially those used in the high temperature environment of gas turbines. More specifically, the present invention relates to a method of achieving controlled weld repair of defects on components made of these alloys by minimizing melting of the alloy by repairing the defect with a filler material. Background technique [0002] The hot and high-temperature section components of gas turbines, such as vanes (blades), vanes (nozzles) and combustion chambers, are usually made of nickel, cobalt and iron-based superalloys with the required mechanical properties at gas operating temperatures . These parts are usually in the form of castings and therefore may have point defects that need to be repaired, such as ceramic inclusions, porosity, and small line defects. Different welding techniques can be used to repair these defects, including tungsten gas shielded (TIG) w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/04B23K9/16B23K26/00B23K26/34B23K31/00B23K33/00
CPCY10T29/49318B23P6/005B23K9/04B67D1/0081B67D1/06B67D2001/0089
Inventor 约翰·T·墨菲
Owner GENERAL ELECTRIC CO
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