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Pretreatment and repair method for FGH96 alloy size out-of-tolerance part

A technology of out of tolerance and repair method, applied in metal material coating process, coating, melting spray plating and other directions, to achieve the effect of high economic benefit, high production efficiency and broad market prospect

Pending Publication Date: 2022-03-04
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the size repair problem of FGH96 powder superalloy parts, and to provide a pretreatment and size repair method for the out-of-tolerance parts of such material parts

Method used

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  • Pretreatment and repair method for FGH96 alloy size out-of-tolerance part
  • Pretreatment and repair method for FGH96 alloy size out-of-tolerance part
  • Pretreatment and repair method for FGH96 alloy size out-of-tolerance part

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The pretreatment and repair method of the FGH96 alloy size out-of-tolerance part includes the following steps:

[0047] Step 1), part shot peening layer removal:

[0048] The shot peening layer of the FGH96 parts to be repaired is turned, and the removal depth is 0.07mm.

[0049] Step 2), the parts are sprayed to degrease and decontaminate:

[0050] Carry out degreasing and decontamination treatment on the parts, use alcohol immersion and absorbent cotton to wipe to ensure that the surface of the parts is free of oil.

[0051] Step 3), low stress dry sand blowing:

[0052] For FGH96 parts, 20# white corundum sand is used, and the wind pressure is 0.10MPa, and the distance is 20mm for dry blowing sand treatment, so that the surface roughness of FGH96 parts after treatment reaches Ra1.3.

[0053] Step 4), low-temperature nitrogen cooling treatment:

[0054] Metal tooling is used to protect the non-spraying area of ​​the part, and then the part is placed on the turntab...

Embodiment 2

[0062] The pretreatment and repair method of the FGH96 alloy size out-of-tolerance part includes the following steps:

[0063] Step 1), part shot peening layer removal:

[0064] The shot blasting layer of the FGH96 parts to be repaired is turned, and the removal depth is 0.10mm.

[0065] Step 2), the parts are sprayed to degrease and decontaminate:

[0066] Carry out degreasing and decontamination treatment on the parts, use the method of alcohol soaking and absorbent cotton wiping to ensure that the surface of the parts is free of oil.

[0067] Step 3), low stress dry sand blowing:

[0068] For FGH96 parts, 20# white corundum sand is used, and the wind pressure is 0.15MPa, and the distance is 30mm, so that the surface roughness of FGH96 parts reaches Ra1.6.

[0069] Step 4), low-temperature nitrogen cooling treatment:

[0070] Metal tooling is used to protect the non-spraying area of ​​the part, and then the part is placed on the turntable, and a low-temperature nitrogen ...

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Abstract

The invention aims to solve the problem of size repair of FGH96 powder high-temperature alloy parts, and provides a pretreatment and size repair method for out-of-tolerance parts of parts made of the FGH96 powder high-temperature alloy parts made of the FGH96 powder high-temperature alloy parts. For the FGH96 powder high-temperature alloy part, size measurement analysis of the part, precision turning removal of a shot blasting layer of the part, low-stress sand blasting treatment before spraying, nitrogen cooling treatment of the part before spraying and low-temperature nitrogen cooling of the part in the NiCrFeMo coating spraying process are carried out. And the developed low-stress NiCrFeMo coating meets the size repairing requirement of the FGH96 powder high-temperature alloy for the advanced aero-engine, and the high production efficiency and the low preparation cost are achieved. The coating prepared through the method has good bonding strength, the coating and an FGH96 powder high-temperature alloy material base body have good matching performance, and long-life and high-reliability application in aero-engines can be achieved.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, and in particular relates to a pretreatment and repair method for the out-of-tolerance parts of FGH96 powder alloy parts. Background technique [0002] FGH96 powder superalloy parts are important parts of the high-vortex rotor of aero-engines. The parts rotate at high speed and withstand high temperatures during the working process. The powder metallurgy disk is expensive. Once the parts are out of tolerance, they may face the risk of being scrapped. Therefore, the alloy parts of this type The economic benefits of dimensional repair are very large, and the demand in the aviation field is also very extensive. Contents of the invention [0003] The purpose of the present invention is to solve the problem of size repair of FGH96 powder superalloy parts, and provide a method for pretreatment and size repair of the out-of-tolerance parts of such material parts. This method can effectively repa...

Claims

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Application Information

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IPC IPC(8): C23C4/02C23C4/08C23C4/134C22C19/05C23C4/01
CPCC23C4/02C23C4/08C23C4/134C22C19/056C23C4/01
Inventor 芦国强梅飞强张佳平程玉贤张春刚
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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