Magnesium alloy bar power ultrasonic semi-continuous casting and flaw detection device and method

A flaw detection device, magnesium alloy technology, applied in the direction of casting equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of combination, etc., to achieve the effect of smooth movement, low current and low energy consumption

Inactive Publication Date: 2016-04-27
JILIN UNIV
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Problems solved by technology

[0009] Although the above-mentioned units or individuals have carried out meticulous research work on ultrasonic grain refinement or ultrasonic non-destructive testing, they have not combined the two, and often only focus on one aspect

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  • Magnesium alloy bar power ultrasonic semi-continuous casting and flaw detection device and method

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Embodiment

[0044] According to the ingredient ratio of AZ31B magnesium alloy, pure Mg, pure Al and pure Zn are melted and refined in an alloy melting furnace at 680-720°C in sequence, and then transferred to a holding furnace and kept at 720°C to ensure uniform temperature of alloy liquid , to be poured. Considering the phenomenon of shrinkage of 3-5mm and the removal of the defective layer with a thickness of 8-10mm on the outer skin of the cast rod, in order to produce a 90mm magnesium alloy cast rod, the diameter of the crystallizer is selected to be 105mm, according to the type of alloy, casting temperature and diameter of the cast rod and other parameters, select the ultrasonic field parameter as 100KHz pulse wave, the power as 1KW, and the matching casting speed as 100mm / min, and set the parameters on the power ultrasonic generator and semi-continuous casting machine respectively. Considering that the diameter of the casting rod pulled out from the crystallizer is about 100mm, six ...

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Abstract

The invention provides a magnesium alloy bar power ultrasonic semi-continuous casting and flaw detection device and method. The magnesium alloy bar power ultrasonic semi-continuous casting and flaw detection device comprises a power ultrasonic generating device, an ultrasonic flaw detection processing system and a vertical direct water-cooling semi-continuous casting machine. The power ultrasonic generating device comprises an ultrasonic generator, an ultrasonic time-sharing vibration control system and three ultrasonic transmitting assemblies with the same specification. Each ultrasonic transmitting assembly comprises an ultrasonic transducer, an ultrasonic amplitude transformer and a tool head. The ultrasonic flaw detection processing system comprises an ultrasonic receiving sensor, a signal processing and determination module and an ultrasonic flaw detection display screen. The ultrasonic transmitting assemblies are inserted into molten magnesium alloy at the same time, and controlled by the ultrasonic time-sharing vibration control system to transmit power ultrasound at intervals, and the molten magnesium alloy solidifies under the action of an ultrasonic field so that fine-grain cast bars can be obtained. Ultrasonic waves transmitted by the ultrasonic transmitting assemblies serve as a signal source, the waveforms of the ultrasonic waves are processed through the ultrasonic receiving sensor and the signal processing and determination module, and the internal flaw conditions of the cast bars are determined according to prompts on the ultrasonic flaw detection display screen.

Description

technical field [0001] The invention belongs to the field of metallurgy and metal material preparation, and in particular relates to a magnesium alloy rod power ultrasonic semi-continuous casting and flaw detection device and method. Background technique [0002] Magnesium alloy is known as "the green engineering material of the 21st century". It has the advantages of low density, high specific strength and specific stiffness, strong electromagnetic shielding ability, good cutting and processing performance, excellent casting performance and easy recycling. It is widely used in aerospace , automotive and electronics fields. [0003] The basic principle of semi-continuous casting is to pour the metal melt into the crystallizer cooled by circulating water. When the melt starts to solidify into a slab shell, it is pulled out of the mold by a traction device and continues to spray water to cool it, thus obtaining Ingot. The semi-continuous casting method has the advantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/114B22D11/14B22D2/00
CPCB22D11/001B22D2/00B22D11/114B22D11/141
Inventor 马佳军曹占义姜博孙旭姜巍刘利萍
Owner JILIN UNIV
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