Ultrasonic-assisted semi-solid welding method of aluminum alloy and magnesium alloy

Abstract

The invention provides an ultrasonic-assisted semi-solid welding method used for aluminum alloy and magnesium alloy, and relates to a welding method used for aluminum alloy and magnesium alloy. By adoption of the ultrasonic-assisted semi-solid welding method used for aluminum alloy and magnesium alloy, the problems that according to a traditional welding method for aluminum alloy and magnesium alloy, hard and fragile intermetallic compounds are generated due to the high welding temperature; and a welding method based on an intermediate layer needs a vacuum or gas-shielded environment and is low in welding efficiency are solved. The ultrasonic-assisted semi-solid welding method used for aluminum alloy and magnesium alloy comprises the first step of selection of solder components, the secondstep of solder preparation, the third step of pre-treatment for obtaining a to-be-welded assembly, and the fourth step of application of ultrasonic vibration when the temperature reaches a welding temperature so as to conduct welding under the ultrasonic cavitation effect. The ultrasonic-assisted semi-solid welding method used for aluminum alloy and magnesium alloy has the beneficial effects thatfirstly, the welding efficiency of aluminum and magnesium is improved, and intermetallic compounds in weld joints are eliminated; secondly, the solder can be selected flexibly; thirdly, the solder components can be proportioned flexibly; fourthly, the welding temperature is low; fifthly, the ultrasonic application position is flexible; and sixthly, the cost is low, and the adaptability is high. The ultrasonic-assisted semi-solid welding method is mainly used for welding aluminum alloy and magnesium alloy.

Description

technical field [0001] The invention relates to a welding method of aluminum alloy and magnesium alloy. Background technique [0002] The current world-wide environmental degradation and energy crisis have made light alloys, such as aluminum alloys and magnesium alloys, more and more widely used. Many parts in industries such as automobile manufacturing and electronic products involve the welding of aluminum-magnesium dissimilar alloys. However, due to the different atomic radii, electronegativity, etc. of aluminum and magnesium, hard and brittle intermetallic compounds are easily produced in the welded joints of these two materials. Intermetallic compounds generally have low toughness, and are prone to cracks when the joint is subjected to external force, which becomes the source of joint failure. Therefore, inventing a welding method that can eliminate intermetallic compounds in aluminum-magnesium joints will greatly promote the wide application of aluminum-magnesium joi...

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem that the traditional welding method of aluminum alloy and magnesium alloy has high welding temperature, resulting in the production of hard and brittle intermetallic compounds, and the welding method using the intermediate layer needs a vacuum or gas protection environment, and the welding efficiency is low problem, and provide an ultrasonic-assisted semi-solid welding method for aluminum alloy and magnesium alloy

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