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Method for electron beam composite instant liquid phase diffusion bonding of GH4169 high-temperature alloy

A technology of GH4169 and high-temperature alloys, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as liquefaction cracks and low tensile strength of joints

Active Publication Date: 2013-09-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low joint tensile strength and easy liquefaction cracks in the existing connection method of GH4169 superalloy, and provide a method for connecting GH4169 superalloy with electron beam composite instantaneous liquid phase diffusion

Method used

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  • Method for electron beam composite instant liquid phase diffusion bonding of GH4169 high-temperature alloy

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specific Embodiment approach 1

[0012] Specific implementation mode 1: In this implementation mode, the method for connecting GH4169 superalloy by electron beam composite transient liquid phase diffusion is implemented according to the following steps:

[0013] 1. Use sandpaper to polish the surface to be welded of the GH4169 superalloy specimen, and clean the GH4169 superalloy specimen with acetone or absolute ethanol to obtain the cleaned GH4169 superalloy specimen; 2. Put the middle layer on the cleaned The GH4169 high temperature alloy test piece is placed between the surfaces to be welded, and then placed in a vacuum diffusion connection furnace, and the GH4169 high temperature alloy test piece is assembled with a pressure of 0.05 to 15 MPa, and the vacuum degree in the vacuum diffusion connection furnace reaches 5.0×10 -3 Start heating at Pa, and perform initial connection at a connection temperature of 1050-1150°C, stop heating after 20-120 minutes of connection, and cool to room temperature with the f...

specific Embodiment approach 2

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is that step one uses 80#, 180#, 400#, 600#, 800#, 1000# metallographic sandpaper successively to treat the surface to be welded of the GH4169 superalloy test piece Sand smooth. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0016] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, the initial connection is performed at a connection temperature of 1080-1120° C., and the heating is stopped after 60-90 minutes of connection. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for electron beam composite instant liquid phase diffusion bonding of GH4169 high-temperature alloy, belongs to the filed of bonding of the high-temperature alloy, and particularly relates to a method for bonding of the GH4169 high-temperature alloy. The method aims to resolve the problem that for an existing method for bonding of the GH4169 high-temperature alloy, a joint is low in strength of extension, and liquation cracks occur easily. The method for bonding comprises the following steps that first, the surfaces, to be welded, of a test piece of the GH4169 high-temperature alloy are polished, and the test piece is cleaned; second, a middle layer is placed between the surfaces, to be welded, of the test piece of the alloy which is cleaned, and is placed in a vacuum diffusion bonding furnace to conduct primary bonding; third, the test piece is transferred into vacuum electron beam welding equipment, an electron beam welding process is controlled to conduct electron beam welding, the test piece to be welded is taken out, and bonding of the GH4169 high-temperature alloy is completed. According to a welding joint obtained in the method, no liquation crack is produced, and the strength of extension is high.

Description

technical field [0001] The invention belongs to the field of high-temperature alloy connection, and in particular relates to a connection method of GH4169 alloy. Background technique [0002] GH4169 alloy is a Ni-Cr-Fe based superalloy, its strength below 650°C ranks first among superalloys, and it also has excellent thermal fatigue resistance, oxidation resistance and hot working performance. GH4169 alloy occupies an important position in the entire high-temperature alloy field, and is widely used in the manufacture of engine turbine disks, compressor blades, fasteners, engine shafts, engine combustion chambers, exhaust pipes and other components. The quality of many of these components is critical to improving work efficiency, ensuring reliability and safety, and overall improving overall performance. Therefore, the connection of complex components made of GH4169 superalloy has become a very important step in the production of high-performance components, and aerospace ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
Inventor 曹健王义峰王廷林兴涛冯吉才
Owner HARBIN INST OF TECH
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