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Electromagnetic stirring auxiliary argon arc welding repairing method for cast magnesium alloy aviation component

A technology of casting magnesium alloy and electromagnetic stirring, which is applied in the direction of arc welding equipment, manufacturing tools, welding equipment, etc., and can solve the problems of delaying the maintenance cycle of the whole machine, welding pores and cracks on the surface of the weld, and scrapping

Inactive Publication Date: 2017-12-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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AI Technical Summary

Problems solved by technology

When the aircraft maintenance factory adopts the conventional argon arc welding method for welding repair, it is found that welding pores and cracks always appear on the surface of the weld, which leads to the direct scrapping of many aviation cast magnesium alloy components because it is difficult to repair
However, in the maintenance process of aircraft magnesium alloy components, the cost of replacing new parts is very high, and the maintenance cycle of the whole machine is prone to be delayed due to insufficient spare parts, so it is urgent to seek or invent a new cast magnesium alloy repair technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] A certain type of aircraft casting magnesium alloy propeller fairing fixing bracket, found surface cracks or even penetrating cracks around the mounting bolt holes during the renovation, and the nearby corrosion was serious. Aiming at the crack corrosion defect, electromagnetic stirring assisted argon arc welding was carried out to repair the defect. The implementation steps are as follows:

[0027] 1. Confirmation of cracks and corrosion of hub spinner fixing bracket

[0028] The fixing bracket of a certain type of aircraft propeller hub fairing is made of ZM5 magnesium alloy. During the renovation of the fixing bracket, cracks were found on the sides of the two mounting bolt holes, one was a surface crack and the other was a penetrating crack, and the edges of the two holes were cracked. A full circle of corrosion pits appeared.

[0029] 2. Repair process and inspection

[0030] (1) Choose Φ1.5mm ZM5 magnesium alloy welding wire as the repair material of the compone...

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PUM

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Abstract

The invention relates to an electromagnetic stirring auxiliary argon arc welding repairing method for a cast magnesium alloy aviation component, and belongs to the technical field of argon arc welding. According to the method, for the cast magnesium alloy aviation component which is cracked and corroded and has other defects after servicing, a welding stick made of the same parent metal or similar components is selected, reasonable electromagnetic stirring and argon arc welding repairing technology parameters are adopted, and cracks and corrosive defects on the component are repaired, wherein the phi of the welding stick ranges from 1.0 mm to 1.6 mm. The repaired part deformation is in the tolerance range, the defects of cracks and incomplete fusion are avoided, and a repairing connector with few metallurgy defects and excellent performance is formed.

Description

technical field [0001] The invention relates to an electromagnetic stirring assisted argon arc welding repair method for cast magnesium alloy aviation components, and belongs to the technical field of argon arc welding. Background technique [0002] At present, during the refurbishment process of aircraft, there are defects such as surface cracks and extensive corrosion on the surface of cast magnesium alloy components. The existence of these service defects seriously threatens the safety and reliability of aircraft in subsequent service. When the aircraft maintenance factory adopts the conventional argon arc welding method for welding repair, it is found that welding pores and cracks always appear on the surface of the weld, which leads to the direct scrapping of many aviation cast magnesium alloy components because it is difficult to repair. However, in the maintenance process of aircraft magnesium alloy components, the cost of replacing new parts is very high, and the mai...

Claims

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Application Information

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IPC IPC(8): B23K9/235B23K9/16B23K9/32
CPCB23K9/235B23K9/16B23K9/32B23K2103/15
Inventor 秦仁耀孙兵兵周标郭绍庆刘伟张学军
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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