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Laser repair welding method for casting flaws of Ti3Al castings

A casting defect and laser repair welding technology, which is applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of poor metal-plastic toughness, inclusions, and difficult forming

Active Publication Date: 2015-03-25
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

due to Ti 3 Al-based alloys have disadvantages such as relatively poor plastic toughness and difficult forming, which will inevitably lead to casting defects such as cracks, inclusions, shrinkage and porosity in the casting process, and repair welding measures are required to repair parts defects

Method used

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  • Laser repair welding method for casting flaws of Ti3Al castings

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Effect test

specific example 1

[0032] Repairing Ti by Laser Cladding 3 Casting Defects of Al Guide Vane Inner Ring Casting

[0033] 1. Confirmation of casting defects of guide vane inner ring castings

[0034] The inner ring of the low-pressure turbine guide vane of a certain engine verification machine is Ti 3 The Al casting, which belongs to the variable-wall-thickness annular part with multi-boss, porous, and semi-closed annular inner holes, has 5 crack defects in different positions.

[0035] 2. Repair process and inspection

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Abstract

The invention belongs to the technical field of laser processing and relates to a laser repair welding method for casting flaws of Ti3Al castings. The method is mainly used for repairing the casting flaws of the Ti3Al castings. According to the method, for the Ti3Al castings, Ti2AlNb metal powder with malleability better than that of a base body is selected and used as fusion covering materials, reasonable laser fusion covering technological parameters are adopted, and the casting flaws such as cracks, inclusion, shrinkage porosities and incomplete casting of the Ti3Al castings are repaired. Repaired parts are hardly deformed and are free of the defects of cracks, air holes and incomplete fusion, and high-quality repair welded connectors are formed.

Description

technical field [0001] The invention belongs to the technical field of laser processing and relates to a Ti 3 Laser repair welding method for casting defects of Al castings, mainly used for Ti 3 Repair of casting defects of Al castings. Background technique [0002] In order to improve the thrust-to-weight ratio of aero-engines, it is necessary to focus on breakthroughs in key technologies such as structural design, materials, and molding processes of engine components. Reducing the weight of the engine is one of the important ways to increase the thrust-to-weight ratio of the engine. Therefore, lightweight and high-temperature-resistant materials have become excellent materials for advanced aero-engines. Among them, Ti-Al-based alloys have great potential in the application of high-temperature structural materials. It is the material of choice for partial replacement of superalloys. Ti 3 As a kind of Ti-Al-based alloy, Al-based alloy has entered the mature application s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/34B23K26/60B23K26/70
CPCB23K26/34
Inventor 孙兵兵陈波陈冰清张学军郭绍庆唐思熠杜博
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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