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Nickel-based high-temperature alloy turbine supporting base argon arc welding repairing method

A technology of nickel-based superalloy and repair method, which is applied in the direction of arc welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of long maintenance cycle, high replacement cost, welding cracks, etc., and reduce the cost of use and maintenance Effect

Inactive Publication Date: 2019-09-10
航发优材(镇江)增材制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When repairing by the conventional argon arc welding method, the repair shop found that new welding cracks tended to appear in the repaired welds and nearby unwelded areas, which led to many turbine support seats being scrapped directly due to difficulty in repairing.
However, in the maintenance process of the turbine support seat, the cost of replacement is very high, and the maintenance cycle is long, so it is urgent to seek or invent a new repair technology for the nickel-based superalloy turbine support seat

Method used

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  • Nickel-based high-temperature alloy turbine supporting base argon arc welding repairing method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] see figure 1 , when a certain type of engine was refurbished, it was found that fatigue cracks easily appeared near the welding seam at the joint between the connecting pipe and the outer ring of the nickel-based superalloy turbine support seat, and the cracks extended to the unwelded base metal area. Design the back protection device, anti-deformation tooling, and adopt short tungsten pole segmented welding. The implementation steps are as follows:

[0020] 1. Confirmation of cracks in the connecting pipe of the turbine support seat

[0021] The turbine support seat of a certain type of engine is made of GH163 nickel-based superalloy. During the renovation of the turbine support seat, it was found that there were ten small-diameter tubes welded on the inner cylinder, eight of which had fatigue cracks near the welds. The long one is about 20mm.

[0022] 2. Repair process and inspection, nickel-based superalloy turbine support seat argon arc welding repair method, incl...

Embodiment 2

[0031] see figure 1 , when a certain type of engine was refurbished, it was found that fatigue cracks easily appeared near the welding seam at the joint between the connecting pipe and the outer ring of the nickel-based superalloy turbine support seat, and the cracks extended to the unwelded base metal area. Design the back protection device, anti-deformation tooling, and adopt short tungsten pole segmented welding. The implementation steps are as follows:

[0032] 1. Confirmation of cracks in the connecting pipe of the turbine support seat

[0033] The turbine support seat of a certain type of engine is made of GH163 nickel-based superalloy. During the renovation of the turbine support seat, it was found that there were ten small-diameter tubes welded on the inner cylinder, and fatigue cracks appeared in six of them near the weld seam. The longest is about 18mm.

[0034] 2. The repair process and inspection, the argon arc welding repair method of the nickel-based superalloy...

Embodiment 3

[0043] see figure 1 , when a certain type of engine was refurbished, it was found that fatigue cracks easily appeared near the welding seam at the joint between the connecting pipe and the outer ring of the nickel-based superalloy turbine support seat, and the cracks extended to the unwelded base metal area. Design the back protection device, anti-deformation tooling, and adopt short tungsten pole segmented welding. The implementation steps are as follows:

[0044] 1. Confirmation of cracks in the connecting pipe of the turbine support seat

[0045]The turbine support seat of a certain type of engine is made of GH163 nickel-based superalloy. During the renovation of the turbine support seat, it was found that there were ten small-diameter tubes welded on the inner cylinder, nine of which had fatigue cracks near the weld. The long one is about 19mm.

[0046] 2. Repair process and inspection, nickel-based superalloy turbine support seat argon arc welding repair method, includi...

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Abstract

The invention discloses a nickel-based high-temperature alloy turbine supporting base argon arc welding repairing method. The nickel-based high-temperature alloy turbine supporting base argon arc welding repairing method comprises the following steps that firstly, a nickel-based high-temperature alloy welding wire consistent to a supporting base in material component is selected; secondly, surfacetreatment is conducted before repairing; thirdly, a protection cover is pasted on the supporting base through aluminum foil paper, then, inward argon inflation is constantly conducted through an airpipe, the back face of a welding line is arranged in the closed argon protection environment, and the supporting base to which the aluminum foil is pasted is arranged in a special anti-deformation tool; fourthly, argon arc welding repairing is conducted, the notch position is completely and fully welded, complete full welding is achieved through visual checking, the phenomena of undercuts and pitsare avoided, and repair welding is conducted several times till repair welding is finished; fifthly, postweld heat treatment is conducted; sixthly, grinding machining is conducted; and seventhly, lossless detection is conducted. By means of the nickel-based high-temperature alloy turbine supporting base argon arc welding repairing method, the usage and maintenance cost of the engine turbine supporting base is reduced, and the repaired part is free of crack defects.

Description

technical field [0001] The invention relates to the technical field of argon arc welding repair, in particular to a method for repairing a nickel-based high-temperature alloy turbine support seat by argon arc welding. Background technique [0002] During the refurbishment of a certain type of engine, it was found that fatigue cracks were prone to appear near the weld joint between the connecting pipe and the outer ring on the nickel-based superalloy turbine support seat. The existence of these service defects seriously threatened the safety and reliability of the aircraft in subsequent service. . When the repair shop used conventional argon arc welding method for repair, it was found that new welding cracks were easy to appear in the repaired weld seam and the nearby unwelded area, which caused many turbine support seats to be scrapped directly because they were difficult to repair. However, in the maintenance process of the turbine support seat, the cost of replacement is ...

Claims

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Application Information

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IPC IPC(8): B23P6/00B23K9/16
CPCB23K9/16B23P6/00
Inventor 李鹏飞孙兵兵
Owner 航发优材(镇江)增材制造有限公司
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