A welding method of 40% silicon carbide particle reinforced aluminum matrix composites with pure Zn as intermediate reaction material layer

A technology of silicon carbide particles and reactive materials, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of difficult formation of metallurgical bonding, hindering the contact between liquid intermediate reaction material layer and aluminum alloy, etc.

Active Publication Date: 2020-10-27
东莞市新玛博创超声波科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The welding of aluminum matrix composites with medium and high volume fractions, especially brazing and conventional TLP welding, has the following problems that need to be solved urgently: 1. Breaking and removal of the oxide film on the aluminum surface of the base metal to be welded during the welding process; 2. Liquid metal Wetting and interfacial bonding of the particle-reinforced phase, segregation of the SiC particle-reinforced phase in the tie layer
Due to the existence of a dense oxide film on the surface of the base metal to be welded, the contact between the liquid intermediate reaction material layer and the aluminum alloy is hindered during welding, making it difficult to form a metallurgical bond

Method used

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  • A welding method of 40% silicon carbide particle reinforced aluminum matrix composites with pure Zn as intermediate reaction material layer
  • A welding method of 40% silicon carbide particle reinforced aluminum matrix composites with pure Zn as intermediate reaction material layer
  • A welding method of 40% silicon carbide particle reinforced aluminum matrix composites with pure Zn as intermediate reaction material layer

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Effect test

Embodiment 2

[0097] The main structure, principle and effect of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference is that

[0098] In the step of breaking the oxide film and releasing the enhanced phase, the physical state of the base material 3 to be welded is solid, and the physical state of the intermediate reaction material layer 4 is solid;

[0099] In the redistribution step of the reinforcement phase, the physical state of the base material 3 to be welded is solid, and the intermediate reaction material layer 4 disappears and transforms into a full-SiC particle-reinforced α-Al solid solution joint, and the full-SiC particle-reinforced α-Al solid-solution joint The physical state is solid;

[0100] In the step of completing the welding assembly, the physical state of the base metal 3 to be welded is solid, and the physical state of the fully SiC particle reinforced α-Al solid solution joint is solid.

Embodiment 3

[0102] The main structure, principle and effect of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference is that in the steps of breaking the oxide film and enhancing phase release, the reaction temperature of the intermediate reaction material layer 4 is controlled at 400°C. , the application time of welding ultrasonic wave to the assembly to be welded is 10 seconds; in the step of releasing the oxide film and the reinforcement phase and the redistribution step of the reinforcement phase, the application time of the application of welding ultrasonic wave to the assembly to be welded is 210 seconds, the reaction of the intermediate reaction material layer 4 The temperature is controlled at 430°C.

Embodiment 4

[0104] The main structure, principle and effect of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference is that in the steps of breaking the oxide film and enhancing phase release, the reaction temperature of the intermediate reaction material layer 4 is controlled at 395°C , the application time of welding ultrasonic wave to the assembly to be welded is 10 seconds; in the step of releasing the oxide film and the reinforcement phase and the redistribution step of the reinforcement phase, the application time of the application of welding ultrasonic wave to the assembly to be welded is 210 seconds, the reaction of the intermediate reaction material layer 4 The temperature was controlled at 425°C.

[0105] Embodiment four

[0106] The main structure, principle and effect of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference is that in the steps of breaking the oxide film and enhancing...

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Abstract

The invention discloses a welding method for a 40% silicon carbide particle-reinforced aluminum matrix composite (SiCp-Al) with pure Zn as an intermediate reaction material layer. The base metal to bewelded is the 40% the silicon carbide particle-reinforced aluminum matrix composite, pure zinc foil is selected as the intermediate reaction material layer according to the design conditions of the intermediate reaction material layer, the choice of the pure zinc foil as the intermediate reaction material layer is beneficial for reducing the welding temperature, and an all silicon carbide (SiC) particle-reinforced alpha-Al solid solution joint is more easily obtained. Under appropriate ultrasound time and connecting temperature conditions, the all SiC particle-reinforced alpha-Al solid solution joint is obtained by combining the process method of primary ultrasonic welding and secondary ultrasonic heat preservation, welding is completed in an atmospheric environment without brazing fillermetal assistance, greening and environmental protection are achieved, the welding time is short, the mechanical properties of the joint are high, and the welding effect is good.

Description

technical field [0001] The invention relates to the technical field of welding silicon carbide particle-reinforced aluminum-based composite materials, in particular to a welding method for a 40% silicon carbide particle-reinforced aluminum-based composite material in which pure Zn is used as an intermediate reaction material layer. Background technique [0002] Silicon carbide particle reinforced aluminum matrix composites (SiCp-Al) are widely used in aviation, aerospace, etc. due to their low density, low thermal expansion coefficient, high specific strength and specific stiffness, high elastic modulus and good wear resistance Structural devices requiring high strength and high temperature resistance. With the increasing application of SiCp-Al composite materials, the requirements for its welding are also getting higher and higher. [0003] The welding of aluminum matrix composites with medium and high volume fractions, especially brazing and conventional TLP welding, has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/10B23K20/24B23K20/26
CPCB23K20/10B23K20/24B23K20/26
Inventor 赖志伟
Owner 东莞市新玛博创超声波科技有限公司
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