Medium-plasticity high energy absorption magnesium alloy and deeply cold-bending tubular product preparation device and method

Abstract

The invention discloses medium-plasticity high energy absorption magnesium alloy and a deeply cold-bending tubular product preparation device and method and belongs to the technical field of metallicmaterial technology and metallurgy. The medium-plasticity high energy absorption magnesium alloy comprises the following components in percent by mass: 1.5%-2.2% of Zn, 0.2%-0.7% of Ce, 0.1%-0.2% of La, 0.3%-0.9% of Mn, 0.06%-0.6% of Zr, 0.1%-0.3% of Ca and the balance of Mg and impurities, wherein the mass ratio of Ce to La is (2-7):1; the mass ratio of Mn to Zr is (1.5-5):1; and the mass percentof the impurity Fe is less than 0.003%. The deeply cold-bending tubular product preparation device comprises a hollow extruding rod, a flow distribution extruding upper die, a flow distribution extruding lower die, an extruding cylinder, an extruding gasket and a turbocharging cooling system. The magnesium alloy tubular product preparation method comprises the following steps: 1, smelting the rawmaterial and carrying out purification treatment on the melt; 2, lowering the temperature of the melt to 680-700 DEG C and then carrying out semicontinuous casting; and 3, carrying out flow distribution extrusion on a magnesium alloy bar subjected to homogenization treatment and pretreatment to obtain a deeply cold-bending high energy absorption magnesium alloy tubular product.

Description

Technical field [0001] The invention belongs to the field of metal material technology and metallurgical technology, and specifically relates to a device and method for preparing a medium-plasticity high-energy-absorbing magnesium alloy and a pipe capable of deep cold bending. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength, excellent vibration damping, electromagnetic shielding and machining performance. It is an ideal material for lightweight structure. Magnesium alloy extrusion pipe is an important bulk product form for the production of wrought magnesium alloy structural parts. It can be widely used in civilian fields such as bicycles, wheelchairs, beach chairs, outdoor furniture, sports equipment, etc., and can also be widely used in aerospace and military industries. However, in the production of pipe members, secondary plastic forming processes such as bending and diameter reduction (diameter expansion or reduction) o...

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Problems solved by technology

[0007] Aiming at the current problems of magnesium alloys and their pipes, and overcoming the poor formability of secondary processing of existing magnesium alloy pipes, the small-diameter thin-walled pipes cannot maintain the uniformity of the aperture at the bending deformation without adding a mandrel, and the like. The present invention provides a medium A plastic high-energy-absorbing magnesium alloy and a deep cold-bending pipe preparation device and method, the method provides a high-energy-absorbing magnesium alloy with medium plasticity, and provides a deep cold-bending pipe corresponding to the magnesium alloy Preparation device and method

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