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Titanium alloy and aluminum alloy or aluminum base compound material ultrasound precoating and soldering method

A technology of aluminum-based composite materials and brazing methods, which is applied in the direction of metal material coating technology, coating, welding equipment, etc., can solve problems such as cracks, expensive production cycles of connecting equipment, and low bonding strength of joints. Simple, low manufacturing cost, reliable connection without breakage

Active Publication Date: 2008-10-15
哈尔滨工大光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the existing method of directly welding titanium alloys and aluminum alloys or aluminum-based composite materials, resulting in hard, brittle and thick intermetallic compounds, cracks or intermittent microcracks, Due to the technical problems of low joint strength, expensive connection equipment and long production cycle, a method of ultrasonic pre-coating brazing of titanium alloy and aluminum alloy or aluminum matrix composite material is proposed

Method used

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  • Titanium alloy and aluminum alloy or aluminum base compound material ultrasound precoating and soldering method
  • Titanium alloy and aluminum alloy or aluminum base compound material ultrasound precoating and soldering method
  • Titanium alloy and aluminum alloy or aluminum base compound material ultrasound precoating and soldering method

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specific Embodiment approach 1

[0011] Specific Embodiment 1: In this embodiment, the ultrasonic pre-coating brazing method of titanium alloy and aluminum alloy or aluminum matrix composite material is realized through the following steps: 1. Clean the surface of titanium alloy plate and aluminum alloy or aluminum matrix composite material plate; 2. Immerse the part of the titanium alloy plate to be welded in the molten aluminum alloy at a temperature of 750-800°C, and keep the temperature constant for ultrasonic coating; 3. Grind the aluminum alloy layer coated on the surface of the titanium alloy plate, and grind it The thickness of the finished aluminum alloy layer is uniform and smooth; 4. Put the part of the ground titanium alloy plate to be welded into the solder pool. Vibration treatment under certain conditions for 1-25s; 5. Put the part to be welded of the aluminum alloy or aluminum matrix composite plate into the solder pool, at an ultrasonic frequency of 20-100kHz, an amplitude of 1-50μm, and a tem...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the titanium alloy in the titanium alloy plate in Step 1 is TA, TB or TC series alloys. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in Step 1, the aluminum alloy in the aluminum alloy and its composite material plate is LY, LF or LD series alloy. Other steps and parameters are the same as in the first embodiment.

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Abstract

A titanium alloy and aluminum alloy or aluminum matrix composite ultrasound pre-coating brazing method relates to a method for welding the titanium alloy and the aluminum alloy or the aluminum matrix composite, and solves the technical shortcomings with prior method for weldingthe titanium alloy and the aluminum alloy or the aluminum matrix composite, including hard, crisp and thick intermetallic compounds produced on the interface, cracks and uncontinuous micorcracks, low bonding strength of connections, expensive connecting equipment and long production period. The method comprises the steps of cleaning the surface of a titanium plate, ultrasonically pre-coating the surface, polishing and treating the coating layer, ultrasonically coating brazing filler metal on the titanium plates and aluminum plates, and ultrasonically brazing. The method has the advantages of simple process, low production cost, short production period, high mechanical property, etc.

Description

technical field [0001] The invention relates to a welding method of titanium alloy and aluminum alloy or aluminum matrix composite material. Background technique [0002] Titanium alloys, aluminum alloys and aluminum matrix composites are the most promising materials among new materials. Due to its high melting point, small linear expansion coefficient and elastic modulus, and excellent corrosion resistance, titanium alloys have broad application prospects in industries such as aviation, aerospace, nuclear energy, shipbuilding, electronics, and chemical refining. Aluminum alloy and aluminum-based composite materials have low density, high specific strength, good plasticity, and excellent corrosion resistance, so they are used in the manufacture of wings, shells, and empennages in aircraft manufacturing. However, due to the huge difference in physical properties such as melting point, thermal conductivity, and linear expansion coefficient between titanium alloys and aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/06B23K1/20C23C26/02
Inventor 闫久春马志鹏叶广郁李大成于汉臣
Owner 哈尔滨工大光电科技有限公司
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