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Process for repairing pits in titanium alloy aircraft sliding rail in argon arc welding way

A process method, argon arc welding technology, applied in metal processing, arc welding equipment, metal processing equipment, etc., can solve the problems that stress relief annealing treatment is not suitable, affect the fatigue performance of slide rails, etc., and achieve the reduction of aircraft use and maintenance costs, The effect of low cost of materials and equipment, easy operation and implementation

Active Publication Date: 2014-07-30
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the slide rail has undergone vibration strengthening treatment, the surface is under compressive stress, so it is not suitable to perform stress relief annealing after welding, otherwise the original compressive stress state of the surface may change, which will affect the fatigue performance of the slide rail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: A method for repairing pits of TC18 titanium alloy slide rails by argon arc welding.

[0030] Titanium alloy slide rails to be repaired,

[0031] 1. Confirmation of pit defects on aircraft titanium alloy slide rails

[0032] The aircraft titanium alloy slide rail is made of TC18 titanium alloy through precision forging + vibration strengthening. After the two overhaul cycles of the aircraft, due to long-term use, various pressure pit failures occurred on the working surface and side limit surface of this type of slide rail. The indentation depth of the working surface of the slide rail is generally 0.05mm~0.15mm, and the maximum depth of individual indentations is 0.3mm. 0.95mm.

[0033] (1) Measurement records, check and record the number of the slide rail, use a vernier caliper to measure the depth of the indentation and make a mark and record;

[0034] (2) Clean the surface before repairing. When grinding, firmly clamp the cork block on the slide ra...

Embodiment 2

[0039] Embodiment 2: A method for repairing pits of TC18 titanium alloy slide rails by argon arc welding.

[0040] Titanium alloy slide rails to be repaired,

[0041] 1. Confirmation of pit defects on aircraft titanium alloy slide rails

[0042] The aircraft titanium alloy slide rail is made of TC18 titanium alloy through precision forging + vibration strengthening. After the two overhaul cycles of the aircraft, due to long-term use, various pressure pit failures occurred on the working surface and side limit surface of this type of slide rail. The indentation depth of the working surface of the slide rail is generally 0.05mm~0.15mm, and the maximum depth of individual indentations is 0.3mm. 0.95mm.

[0043] (1) Measurement records, check and record the number of the slide rail, use a vernier caliper to measure the depth of the indentation and make a mark and record;

[0044] (2) Clean the surface before repairing. When grinding, firmly clamp the cork block on the slide ra...

Embodiment 3

[0049] Embodiment 3: A method for repairing pits of TC18 titanium alloy slide rails by argon arc welding.

[0050] Titanium alloy slide rails to be repaired,

[0051] 1. Confirmation of pit defects on aircraft titanium alloy slide rails

[0052] The aircraft titanium alloy slide rail is made of TC18 titanium alloy through precision forging + vibration strengthening. After the two overhaul cycles of the aircraft, due to long-term use, various pressure pit failures occurred on the working surface and side limit surface of this type of slide rail. The indentation depth of the working surface of the slide rail is generally 0.05mm~0.15mm, and the maximum depth of individual indentations is 0.3mm. 0.95mm.

[0053] (1) Measurement records, check and record the number of the slide rail, use a vernier caliper to measure the depth of the indentation and make a mark and record;

[0054] (2) Clean the surface before repairing. When grinding, firmly clamp the cork block on the slide ra...

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Abstract

The invention belongs to the technical field of welding, relates to a process for repairing pits in a titanium alloy aircraft sliding rail in an argon arc welding way, and is particularly applied to the repair of the pits in the titanium alloy aircraft sliding rail after long-term serving in the field of maintenance of aircraft engines. According to the method, reasonable argon arc welding process parameters are used for repairing the pits in a pitted titanium alloy aircraft sliding rail workpiece, and the surface compressive stress state is recovered by shot peening strengthening after repair; the deformation of the repaired sliding rail is slight, and is controlled within a tolerance range; a repaired part is free of crack defects; the operational performance of the repaired workpiece is recovered; the titanium alloy aircraft sliding rail repaired by the method passes verification before installation, and is successfully installed for use.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a process method for repairing pits of aircraft titanium alloy slide rails by argon arc welding. It is especially suitable for the field of aero-engine maintenance, and repairs the pits generated after long-term service of aircraft titanium alloy slide rails. Background technique [0002] The aircraft titanium alloy slide rail is prepared by precision forging + vibration strengthening. After two refurbishment cycles of the aircraft, due to long-term use, different situations of pressure pit failures will appear on the working surface and side limit surface of this type of slide rail. The indentation depth of the working surface of the slide rail is generally 0.05mm~0.15mm, and the maximum depth of individual indentations is 0.3mm. 0.95mm. These indentation faults need to be repaired by argon arc welding. Since the slide rail has been subjected to vibration strengthening treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235B23K103/14
CPCB23K9/167B23K9/235B23K2101/006B23K2103/14B23P6/00
Inventor 张学军李能孙兵兵郭绍庆
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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