Ultrasound-assisted auxiliary welding method for silicon carbide particle-reinforced aluminum matrix composite (SiCp-Al) 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., and achieve short welding time , good welding effect and high mechanical properties

Active Publication Date: 2019-02-22
东莞市新玛博创超声波科技有限公司
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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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  • Ultrasound-assisted auxiliary welding method for silicon carbide particle-reinforced aluminum matrix composite (SiCp-Al) with pure Zn as intermediate reaction material layer
  • Ultrasound-assisted auxiliary welding method for silicon carbide particle-reinforced aluminum matrix composite (SiCp-Al) with pure Zn as intermediate reaction material layer
  • Ultrasound-assisted auxiliary welding method for silicon carbide particle-reinforced aluminum matrix composite (SiCp-Al) with pure Zn as intermediate reaction material layer

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Effect test

Embodiment 1

[0063] An ultrasonic-assisted welding method of silicon carbide particle-reinforced aluminum matrix composites with pure Zn as an intermediate reaction material layer, figure 1 As shown, including the base material 3 to be welded and the intermediate reaction material layer 4, the base material 3 to be welded is selected from 40%-55% silicon carbide particle reinforced aluminum matrix composite material, including the following steps,

[0064] intermediate reaction material layer screening step,

[0065] Condition 1, the melting temperature of the intermediate reaction material layer 4 is 195-205°C lower than the melting point of the base material 3 to be welded, or the eutectic temperature between the intermediate reaction material layer 4 and the main elements of the base material 3 to be welded is lower than that of the base material 3 to be welded Material 3 has a melting point of 150-300°C, condition 2, the maximum solid solubility between the intermediate reaction materi...

Embodiment 2

[0086] 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 the base material 3 to be welded is made of 40% silicon carbide particle-reinforced aluminum-based composite material, and the intermediate reaction material layer 4 The thickness is selected as 0.3mm.

[0087] In the step of breaking the oxide film and releasing the enhanced phase, the reaction temperature of the intermediate reaction material layer 4 is controlled at 400° C., and the welding ultrasonic action time is applied to the assembly to be welded for 10 seconds; In the distributing step, the ultrasonic welding time is applied to the components to be welded for 210 seconds, and the reaction temperature of the intermediate reaction material layer 4 is controlled at 430°C.

[0088] Taking the aluminum matrix composite material reinforced with 40% silicon carbide particles as the base material 3 to be welded as an ...

Embodiment 3

[0124] 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 the base material 3 to be welded is made of 55% silicon carbide particle-reinforced aluminum-based composite material, and the intermediate reaction material layer 4 The thickness is selected as 0.5mm.

[0125] In the step of breaking the oxide film and releasing the enhanced phase, the reaction temperature of the intermediate reaction material layer 4 is controlled at 400° C., and the welding ultrasonic action time is applied to the assembly to be welded for 10 seconds; In the distribution step, the welding ultrasonic action time is applied to the components to be welded for 120 seconds, and the reaction temperature of the intermediate reaction material layer 4 is controlled at 460°C to obtain a fully connected layer structure with uniformly dispersed SiC particles, as shown in Figure 44 shown.

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Abstract

The invention discloses an ultrasound-assisted auxiliary welding method for a silicon carbide particle-reinforced aluminum matrix composite (SiCp-Al) with pure Zn as an intermediate reaction materiallayer. The base metal to be welded is 40%-55% of the silicon carbide particle-reinforced aluminum matrix composite, pure zinc foil is selected as the intermediate reaction material layer according tothe 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, andan 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 filler metal assistance, greening and environmental protection are achieved, the welding time is short, the mechanical properties of the joint are high, and the welding effectis 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 an ultrasonic-assisted welding method for silicon carbide particle-reinforced aluminum-based composite materials 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 T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/10B23K20/22B23K20/24
CPCB23K20/10B23K20/22B23K20/24
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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