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A kind of magnesium alloy semi-solid billet preparation device and method

A preparation device and magnesium alloy technology, applied in the field of metal semi-solid forming devices, can solve the problems of high process cost, loss of practical application value of blank size, large change of shape and size, etc., achieve uniform structure, reduce equipment capital investment, The effect of fine grain size of the solid phase

Active Publication Date: 2017-05-31
秦皇岛坤森科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deformation treatment methods adopted by the traditional SIMA method belong to the category of traditional deformation processes, such as upsetting, extrusion, rolling, etc., and there is a big change in the shape and size of the billet after deformation, especially when the accumulated large strain is applied. , the size of the blank will lose its practical application value, and there is a problem of high process cost

Method used

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  • A kind of magnesium alloy semi-solid billet preparation device and method
  • A kind of magnesium alloy semi-solid billet preparation device and method
  • A kind of magnesium alloy semi-solid billet preparation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] AZ91D as-cast magnesium alloy bars were processed into diameters of A cylindrical billet with a length of 30mm; the AZ91D as-cast magnesium alloy cylindrical billet 11 is lubricated with a mixed lubricant of machine oil and graphite, and the mixed lubricant of machine oil and graphite is evenly applied to the cylindrical outer surface of the cylindrical billet, and the mold shape The inner surface of the cavity and the outer surface of the extrusion, upsetting and compression punch. Then put it into the composite extrusion cavity of the magnesium alloy semi-solid billet preparation device, and heat the cylindrical billet to the cumulative composite extrusion deformation temperature of 340°C; The small diameter side of block 1 is downward, and then pressure is applied to the briquetting block, so that the extrusion punch 5 descends to extrude the cylindrical billet and deform it into a cup-rod billet, such as image 3 As shown, until the end of the first compound extru...

Embodiment 2

[0029] The ZK60RE cast magnesium alloy bar is processed into a diameter of A cylindrical billet with a length of 30mm; the ZK60RE as-cast magnesium alloy cylindrical billet 11 is lubricated with a mixed lubricant of engine oil and graphite, and the mixed lubricant of engine oil and graphite is evenly applied to the cylindrical outer surface of the cylindrical billet and the mold shape The inner surface of the cavity and the outer surface of the extrusion, upsetting and compression punch. Then put it into the composite extrusion cavity of the magnesium alloy semi-solid billet preparation device, and heat the cylindrical billet to the cumulative composite extrusion deformation temperature of 260°C; The small diameter side of block 1 is downward, and then pressure is applied to the briquetting block, so that the extrusion punch 5 descends to extrude the cylindrical billet and deform it into a cup-rod billet, such as image 3 As shown, until the end of the first compound extrusi...

Embodiment 3

[0031] AM60 as-cast magnesium alloy bars were machined into diameters of A cylindrical billet with a length of 30 mm; the AM60 as-cast magnesium alloy cylindrical billet 11 is lubricated with a mixed lubricant of machine oil and graphite, and the mixed lubricant of machine oil and graphite is evenly applied to the cylindrical outer surface of the cylindrical billet, and the mold shape The inner surface of the cavity and the outer surface of the extrusion, upsetting and compression punch. Then put it into the composite extrusion cavity of the magnesium alloy semi-solid billet preparation device, and heat the cylindrical billet to the cumulative composite extrusion deformation temperature of 380°C; The small diameter side of block 1 is downward, and then pressure is applied to the briquetting block, so that the extrusion punch 5 descends to extrude the cylindrical billet and deform it into a cup-rod billet, such as image 3 As shown, until the end of the first compound extrusi...

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Abstract

The invention relates to a magnesium alloy semi-solid state blank preparing device and method. The device is a die special for accumulated combined extrusion and is mainly composed of a female die cavity, an extrusion male die, a compression male die, an upsetting male die and an ejection rod. The method mainly includes the following steps: an as-cast magnesium alloy bar is placed into the special die to conduct multi-pass accumulated combined extrusion deformation, so that sufficient accumulated induce strain is obtained; and then a pre-deformation blank is subject to isothermal annealing treatment, and the ideal magnesium alloy semi-solid state blank is prepared by controlling the annealing temperature and time. By means of the magnesium alloy semi-solid state blank preparing device and method, the original shape of an accumulated large-strain pre-deformation blank can be kept, the obtained solid phase grains of magnesium alloy semi-solid state structures are even and fine, and the degree of sphericity is good; and in addition, the method is simple, the production efficiency is high, and cost is saved.

Description

technical field [0001] The invention relates to a metal processing device and method, in particular to a metal semi-solid forming device and method. Background technique [0002] The density of magnesium alloy is small, about 1.8g / cm 3 , about 64% of aluminum, 25% of zinc and 20% of steel, is currently the lightest metal structural material that can be applied industrially. Compared with other metal structural materials, magnesium alloy has the advantages of high specific strength, high specific stiffness, good damping performance, good electromagnetic shielding performance, strong anti-collision ability, environmental friendliness, and easy recycling. Electronic technology, communication and other industrial fields have extremely important application value and application prospect. Magnesium alloys have a hexagonal close-packed (HCP) crystal structure with low symmetry and few slip systems. Their plastic deformation ability and forging performance are poor, which largely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/02
CPCB22D18/02
Inventor 贾建波徐岩骆俊廷杨越
Owner 秦皇岛坤森科技有限公司