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Method for eliminating shrinkage defect of nickel-based turbine blade

A turbine blade, nickel-based technology, applied in the field of eliminating turbine blade defects, can solve problems such as shrinkage porosity, high working temperature, high scrap rate, etc., achieve shrinkage cavity and thermal cracking and other defects elimination, fatigue performance improvement, and service life extension Effect

Inactive Publication Date: 2013-09-04
无锡源创机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the working temperature of the first-stage turbine blades of 23,000 gas turbines is as high as 800-850 degrees Celsius, the working environment is harsh
The turbine blades made of M38 nickel-based alloy are prone to defects such as shrinkage porosity, shrinkage cavities and hot cracks during the casting process, which not only has a short service life, but also has a high scrap rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First remove the nickel-based turbine blades with surface defects to obtain nickel-based turbine blades with no defects on the surface.

[0017] Then conduct X-ray inspection on the nickel-based turbine blades with no defects on the surface, and select the nickel-based turbine blades whose shrinkage defects are not up to standard as the processing object.

[0018] Afterwards, the nickel-based turbine blades to be treated are cleaned and dried to remove oil and dust on the surface.

[0019] Afterwards, the cleaned nickel-based turbine blades are loaded into a graphite heating furnace, and aluminum oxide is used to insulate between the nickel-based turbine blades and the furnace wall of the graphite heating furnace.

[0020] Afterwards, heat the graphite heating furnace while filling with argon, so that the temperature of the furnace rises to 1150 degrees Celsius and the pressure reaches 10Mpa, and the temperature and pressure are maintained at a constant temperature for ...

Embodiment 2

[0023] First remove the nickel-based turbine blades with surface defects to obtain nickel-based turbine blades with no defects on the surface.

[0024] Then conduct X-ray inspection on the nickel-based turbine blades with no defects on the surface, and select the nickel-based turbine blades whose shrinkage defects are not up to standard as the processing object.

[0025] Afterwards, the nickel-based turbine blades to be treated are cleaned and dried to remove oil and dust on the surface;

[0026] After that, put the cleaned nickel-based turbine blades into the graphite heating furnace, and isolate the nickel-based turbine blades and the furnace wall of the graphite heating furnace with alumina;

[0027] Afterwards, heat the graphite heating furnace while filling with argon, so that the temperature of the furnace rises to 1190 degrees Celsius and the pressure reaches 10 MPa, and the temperature and pressure are maintained at a constant temperature for 3.5 hours.

[0028] Final...

Embodiment 3

[0030] First remove the nickel-based turbine blades with surface defects to obtain nickel-based turbine blades with no defects on the surface.

[0031] Then conduct X-ray inspection on the nickel-based turbine blades with no defects on the surface, and select the nickel-based turbine blades whose shrinkage defects are not up to standard as the processing object.

[0032] Afterwards, the nickel-based turbine blades to be treated are cleaned and dried to remove oil and dust on the surface.

[0033] Afterwards, the cleaned nickel-based turbine blades are loaded into a graphite heating furnace, and aluminum oxide is used to insulate between the nickel-based turbine blades and the furnace wall of the graphite heating furnace.

[0034] Afterwards, heat the graphite heating furnace while filling with argon, so that the temperature of the furnace rises to 1230 degrees Celsius and the pressure reaches 10 MPa, and the temperature and pressure are maintained at a constant temperature for...

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PUM

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Abstract

The invention discloses a method for eliminating the shrinkage defect of a nickel-based turbine blade, and in particular relates to a method for eliminating the shrinkage defect of a M38 nickel-based alloy turbine blade through utilizing a hot isostatic pressing technology. The method is characterized by sequentially comprising the followings steps of: selecting a nickel-based turbine blade with the shrinkage defect under the internal quality standard as a treatment object, cleaning and drying the treatment object, putting the cleaned and dried nickel-based turbine blade into a graphite heating furnace, heating the graphite heating furnace while filling argon, then cooling along with the furnace, air cooling and the like. After the method is adopted, the service life of the turbine blade can be prolonged, moreover, waste products can be recycled, and the waste can be reduced.

Description

technical field [0001] The invention relates to a method for eliminating defects in turbine blades. Specifically, it is a method of using hot isostatic pressing technology to eliminate shrinkage defects of turbine blades made of M38 nickel-based alloy. Background technique [0002] It is known in the manufacturing and application fields of 23,000 gas turbines that the working temperature of the first-stage turbine blades of 23,000 gas turbines is as high as 800~850 degrees Celsius. Therefore, it is required that the first-stage blades of 23,000 gas turbines must have high temperature resistance and thermal corrosion resistance. Since the working temperature of the first-stage turbine blades of the 23,000 gas turbines is as high as 800-850 degrees Celsius, the working environment is harsh. The turbine blades made of M38 nickel-based alloy are prone to defects such as shrinkage porosity, shrinkage cavities and hot cracks during the casting process, which not only has a short ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
Inventor 唐亚俊陈建种唐浩军秦人骥黄荣芳李英敖
Owner 无锡源创机械科技有限公司
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