High-temperature-resistant solder capable of being used for welding gamma-tial alloy and welding process thereof

A brazing process and high-temperature-resistant technology, which is applied in the field of welding manufacturing, can solve the problems of lack of high-strength and high-temperature solder brazing technology for high-strength and temperature-resistant joints, and achieve the effect of avoiding damage to the matrix structure and improving the diffusion capacity
CN110355496AActive Publication Date: 2019-10-22AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Publication Date
2019-10-22

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Abstract

The invention relates to a high-temperature-resistant solder capable of being used for welding gamma-TiAl alloy and a welding process thereof, and belongs to the technical field of welding manufacturing. Due to the fact that the gamma-TiAl alloy with the light and temperature-resistant structures is small in the moveable slippage coefficient, the plasticity of the material is low, the processing performance is poor, and at present, aiming at high-temperature-resistant welding of the gamma-TiAl alloy, the high-temperature-resistant solder and the welding process are lack. According to the high-temperature-resistant solder and the welding process, the Tti-Zr-Cu-Ni solder with both strength and toughness is designed, the welding of the gamma-TiAl alloy can be realized at the temperature rangeof 930-950 DEG c, the room temperature tensile strength of the joint reaches more than 90% of the strength of the matrix, namely 510-545 Mpa, the tensile strength of the joint at the temperature of 700-760 DEG c can maintain 70-82% of the strength level of the room-temperature joint, namely in the range of 389-445 Mpa; the welding temperature is lower than the heat treatment temperature and phasechange point of the matrix material, and the structure and the performance of the welded metal are not obviously influenced.
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Description

technical field

[0001] The invention relates to a high-temperature-resistant solder and a brazing process that can be used for γ-TiAl alloys, and belongs to the technical field of welding and manufacturing. Background technique

[0002] γ-TiAl alloy (hereinafter referred to as TiAl alloy) has high specific strength, specific modulus, good creep resistance and oxidation resistance, and is a light-weight high-temperature structural material with great potential. Replacing the currently used superalloys with TiAl alloys can greatly reduce the weight of engine parts and improve engine efficiency. Using TiAl alloy to make turbine engine blades can reduce the weight by 45%. The U.S. Air Force Materials Laboratory and GE have developed various typical parts of TiAl alloys. In recent years, domestic cast TiAl alloy turbines and blades have been tested and applied in automotive supercharged turbines and aero engines. For example, TiAl blades have passed the vibration fatigue test c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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