The technology of repairing the pit of aircraft titanium alloy slide rail by argon arc welding

A process method and argon arc welding technology, applied in metal processing, arc welding equipment, metal processing equipment and other directions, can solve the problems of affecting the fatigue performance of the slide rail, and it is not suitable for stress relief annealing treatment, so as to reduce the cost of aircraft use and maintenance, The effect of low cost of materials and equipment, easy operation and implementation

CN103949757BActive Publication Date: 2016-03-02AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-03-02
Patent Text Reader

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.
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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...

Examples

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...