Ultrasound spinning forming technique for magnesium alloy cylinders

Abstract

The invention discloses an ultrasound spinning forming technique for magnesium alloy cylinders, aiming to solve the problems that swelling, instability and forming technique control difficultly of magnesium alloys are easily caused in the process of large-deformation spinning during plastic deformation of spinning forming due to poor plastic deformation performance. An ultrasound-generating processing device is introduced on the basis of conventional spinning forming equipment to enable the high-strength thin-walled magnesium alloy cylinders to be obtained by an ultrasound spinning device. The ultrasound spinning forming technique has the advantages that the processing technique is advanced, textures of processed magnesium alloy spinning cylinders are twinborn textures and recrystallization textures, thin-walled cylinders with wall thickness of 1mm are obtained after ultrasound spinning of magnesium alloy as-cast cylinder blanks with original cylinder blank wall thickness of 20mm, the average Vickers hardness of final cylinders is 124.7HV, the tensile strength is 285Mpa, and the elongation is 3.2%, so that the ultrasound spinning forming technique is a quite ideal plastic forming technique for the magnesium alloys.

Description

technical field [0001] The invention relates to a thermal processing process of a magnesium alloy cylindrical part, in particular to an ultrasonic spinning plastic forming process of a magnesium alloy. Background technique [0002] Based on the advantages of high specific strength, specific stiffness, good casting, machining, dimensional stability and rich resources, magnesium alloy materials are considered to be the most potential environmental protection and energy-saving structural materials in the 21st century. [0003] Magnesium alloys can be divided into cast magnesium alloys and wrought magnesium alloys according to their forming methods. At present, the amount of die-casting magnesium alloy products is greater than that of wrought magnesium alloy products, but magnesium alloys produced by casting, extrusion or rolling have higher strength and better ductility, which cannot be replaced by cast magnesium alloy products. Excellent performance. [0004] The crystal str...

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Problems solved by technology

[0006] The present invention aims at the problems that the existing magnesium alloys are prone to bulging, instability, and difficult to control the forming process during the plastic deformation of the spinning forming process. Introduce an ultrasonic generating device to further improve the surface quality and comprehensive mechanical properties of magnesium alloy cylindrical parts, and realize an ultrasonic spinning forming process for magnesium alloy cylindrical parts under the action of ultrasonic waves

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