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Repair method of high temperature alloy vane by electron beam welding

A high-temperature alloy and electron beam technology, applied in welding media, metal processing, welding equipment, etc., can solve the problems of long residence time, long repair cycle, complex repair process, etc.

Inactive Publication Date: 2007-08-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of complicated repairing process, long repairing period, integral heating during brazing repairing, and long residence time at high temperature during brazing work in the original method for repairing superalloy blades, and the proposed electron beam brazing repairing method Superalloy blade method

Method used

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Examples

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specific Embodiment approach 1

[0004] Specific Embodiment 1: The method for repairing superalloy blades by electron beam brazing in this embodiment is characterized in that the method is realized through the following steps: (1) Grinding off the high temperature to be repaired with a grinder at a speed of 2500 to 3500 rpm 60-100% of the damage on the alloy blade is ground into a groove, and the 80-800-mesh solder or alloy powder with a mass concentration of 95-99.5% of the wetting angle with the blade base material is 0-90° Mix acetone or commercially available general brazing adhesive to form a paste, put the paste mixture into the polished groove and fill the groove; (2) Let stand for 1 to 5 minutes, put the superalloy blade to be repaired into the vacuum chamber and vacuumize to make the vacuum degree in the vacuum chamber 4.50~5.30×10 -2 Pa, when the working distance between the electron gun and the damaged part to be repaired is 100-150mm, the beam input method is down defocus plus scanning, the scanni...

specific Embodiment approach 2

[0007] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the step (1) superalloy blade is an aeroengine blade, a turbine working blade or a guide vane; the brazing filler metal is the BNi-1 brazing filler metal in nickel-based brazing filler metal , BNi-2 solder, BNi-3 solder, BNi-4 solder, BNi-5 solder, BNi-6 solder, BNi-7 solder, BNi-8 solder, Bпp24, Bпp27 or Bпp11 One or BCo-1 solder in cobalt-based solder, the alloy powder is nickel-based alloy powder ZX.Ni17 or cobalt-based alloy powder ZX.Co55. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0008] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step (1), use a grinder to grind away 70% to 90% of the damage on the superalloy blade to be repaired at a speed of 2800 to 3200 rpm The damage is ground into grooves. Other steps are the same as in the first embodiment.

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Abstract

The method of electron beam brazing repair high temperature alloy blades. The invention involves a brazing repair high temperature alloy blade method in order to solve the problems of complex repair art, long repair cycle, the need of integral heating when brazing repair, long retention period at high temperature when brazing work in original method of repair high temperature alloy blade. The method is realized by the following steps: (1) grinding off blade injury and polishing the injury part into trough, mixing the solder or alloy powder and acetone or general soldering bonding agent sold in market into cream status and putting it in groove; (2) setting process parameters and brazing; (3) when the solder or alloy powder are not melted completely, cooling it until room temperature and taking out high temperature alloy blade, the high temperature alloy blade is repaired. The electron beam brazing repair high temperature alloy blade method in the invention has simple repair process and short repair cycle, a cycle requires only 5 minutes to 10 minutes, it only heats the injury position, the retention time of blades when repaired is reduced to 0.1 ~ 10% of original method.

Description

technical field [0001] The invention relates to a method for repairing a superalloy blade by brazing. Background technique [0002] Superalloy blades with excellent performance but very expensive can work for a long time in a high temperature environment of 600°C to 1100°C and have good oxidation resistance and thermal corrosion resistance, good fatigue resistance and high fracture toughness. However, due to the long-term work of the blades, they are subject to wear, impact, high-temperature gas, and cold and heat fatigue. Defects such as cracks, corrosion, and wear will occur, resulting in a large number of blades being scrapped; the high-temperature alloy blade repair technology is used to repair the surface and internal defects of the blade. , restore or even enhance its original performance, etc., which will greatly extend the service life of the engine and effectively improve its economy. However, the original method of repairing superalloy blades has complex repair pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/005B23K1/20B23K35/22B23K35/30B23K101/00
Inventor 张秉刚王刚何景山冯吉才
Owner HARBIN INST OF TECH
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