Device and method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing

A technology of isothermal annealing and magnesium alloy, which is applied in the field of devices for preparing magnesium alloy semi-solid blanks by warm annealing, can solve the problems of high process cost, large blank shape change, and low production efficiency, and achieve high mechanical properties, small forming force, The effect of low equipment requirements

Inactive Publication Date: 2013-10-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of large blank shape change, high process cost and low production efficiency in the preparation of magnesium alloy semi-solid blanks by the existing strain induction method, and provide reciprocating upsetting-extrusion deformation (Repetitive Upsetting-Extrusion, referred to as RUE)- Device and method for preparing magnesium alloy semi-solid blank by isothermal annealing

Method used

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  • Device and method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing
  • Device and method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing
  • Device and method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing

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specific Embodiment approach 1

[0028] Specific Embodiment 1: In this embodiment, the reciprocating upsetting extrusion deformation-isothermal annealing device for preparing a magnesium alloy semi-solid billet consists of an upper template 1, an upper backing plate 2, an upper pressing sleeve 3, an upsetting punch 4, an upper pressing plate 5, and a die The pre-tightening sleeve 6, the die 7, the extrusion punch 9, the lower pressing plate 10, the lower pressing sleeve 11, the lower backing plate 12 and the lower template 13; the die 7 is provided with a cavity, and the die pre-tightening sleeve 6 sets On the outer circle of the die 7, the upper platen 5 is connected to the upper surface of the die 7 and the die pre-tightening sleeve 6 respectively, and the lower pressing plate 10 is connected to the lower surface of the die 7 and the die pre-tightening sleeve 6 respectively. One end of the upsetting punch 4 is inserted into the upper part of the cavity, and the other end of the upsetting punch 4 is fixed in ...

specific Embodiment approach 2

[0030] Specific embodiment 2: The method of reciprocating upsetting extrusion deformation-isothermal annealing to prepare magnesium alloy semi-solid billet in this embodiment is implemented through the following steps:

[0031] 1. Machining the as-cast magnesium alloy billet into a cylindrical bar;

[0032] 2. Lubricate the cylindrical bar, and then put it into the cavity of the device for preparing magnesium alloy semi-solid billet through reciprocating upsetting extrusion deformation-isothermal annealing, and heat the cylindrical bar to the upsetting temperature;

[0033] 3. The upsetting cylindrical bar is deformed through the upsetting punch until it fills the cavity. After the upsetting punch is reset, the device is turned over and reciprocated for extrusion deformation-isothermal annealing to prepare a magnesium alloy semi-solid billet, and then through extrusion The punch moves downward to extrude the cylindrical bar until it fills the cavity, and performs the upsetting...

specific Embodiment approach 3

[0040]Embodiment 3: This embodiment is different from Embodiment 2 in that the material of the magnesium alloy is AZ91D magnesium alloy, AZ61 magnesium alloy, ZK60 magnesium alloy, AZ31 magnesium alloy or AM60 magnesium alloy.

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Abstract

The invention relates to a device and a method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing, belonging to the field of metal semi-solid forming technology and mainly aiming at solving the problems that the magnesium alloy semi-solid blank prepared by the existing strain inducement method is greatly changed in shape, has high technology cost, and low production efficiency. The repetitive upsetting-extrusion device mainly comprises a pair of buckled half module female die cavity and upper upsetting lower extruding male die. The method comprises the following steps of putting a cast magnesium alloy bar material into the device for repetitive upsetting extrusion deformation for many times, so as to have enough accumulated inducing strain; and carrying out isothermal annealing treatment on pre-deformed blank, thus obtaining the magnesium alloy semi-solid blank through controlling the annealing temperature and time reasonably. According to the method, the original appearance shape of large strain pre-deformed blank can be guaranteed to be accumulated, the obtained magnesium alloy semi-solid issue has fine and uniform solid phase grains and good degree of sphericity, and the method is simple, has low cost and has high production efficiency.

Description

technical field [0001] The invention belongs to the technical field of metal semi-solid forming technology, and in particular relates to a device and method for preparing magnesium alloy semi-solid blanks through reciprocating upsetting extrusion deformation-isothermal annealing. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength, high specific stiffness, good damping performance, good electromagnetic shielding performance, environmental friendliness, and easy recycling. It has extremely important applications in aerospace, automotive, electronics, communications and other industrial fields value and application prospects. However, the plastic forming properties of magnesium alloys are poor, which limits the application of magnesium alloy materials to a large extent. The emergence of semi-solid forming technology has opened up a new way for the processing and forming of magnesium alloys, and is expected to become a practi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06
Inventor 胡连喜徐岩孙宇
Owner HARBIN INST OF TECH
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