Forging forming method for magnesium alloy rings

A magnesium alloy and ring technology, applied in the field of magnesium alloy processing, can solve problems such as easy cracking in forging and complex forming process of magnesium alloy rings, and achieve the effects of less equipment investment, excellent mechanical properties, and easy process control

Inactive Publication Date: 2014-04-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention aims at the complex forming process of magnesium alloy rings, easy cracking in forging and other problems, and provides a method for preparing magnesium alloy rings with high production efficiency, simple operation, easy process control, and stable product quality. forging forming process

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  • Forging forming method for magnesium alloy rings

Examples

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Effect test

Embodiment 1

[0017] Example 1 : the magnesium alloy that present embodiment selects is the AZ31 ingot of semi-continuous casting, and the forging forming of ring comprises the following steps:

[0018] 1) Cutting: Saw the AZ31 magnesium alloy ingot and cut it into cube blocks. The size of the block is determined according to the size of the ring and the principle of constant volume. The height / side ratio of the cube is 1.1.

[0019] 2) Billet homogenization heat treatment: put the AZ31 magnesium alloy billet in a resistance furnace for homogenization heat treatment, adopt a two-stage homogenization heat treatment system, that is, 300°C×2h+400°C×12h, to eliminate casting segregation as much as possible, and make the microstructure Uniform; air cool to room temperature after homogenization.

[0020] 3) Pretreatment of blanks and molds before forging, including:

[0021] a. Surface lubrication: Coating graphite lubricant on the surface of the mold cavity and the surface of the billet, the g...

Embodiment 2

[0026] Example 2: The magnesium alloy selected in this embodiment is the AZ31 ingot of semi-continuous casting, and the forging forming of the ring comprises the following steps:

[0027] 1) Cutting: Saw the AZ31 magnesium alloy ingot and cut it into cube blocks. The size of the block is determined according to the size of the ring and the principle of constant volume. The height / side ratio of the cube is 1.02.

[0028] 2) Billet homogenization heat treatment: put the AZ31 magnesium alloy billet in a resistance furnace for homogenization heat treatment, adopt a two-stage homogenization heat treatment system, that is, 300°C×2h+400°C×12h, to eliminate casting segregation as much as possible, and make the microstructure Uniform; air cool to room temperature after homogenization.

[0029] 3) Pretreatment of blanks and molds before forging, including:

[0030] a. Surface lubrication: Coating graphite lubricant on the surface of the mold cavity and the surface of the billet, the ...

Embodiment 3

[0035] Example 3 : the magnesium alloy that present embodiment selects is the AZ31 ingot of semi-continuous casting, and the forging forming of ring comprises the following steps:

[0036] 1) Cutting: Saw the AZ31 magnesium alloy ingot and cut it into cube blocks. The size of the block is determined according to the size of the ring and the principle of constant volume. The height / side ratio of the cube is 0.9.

[0037] 2) Billet homogenization heat treatment: put the AZ31 magnesium alloy billet in a resistance furnace for homogenization heat treatment, adopt a two-stage homogenization heat treatment system, that is, 300°C×2h+400°C×12h, to eliminate casting segregation as much as possible, and make the microstructure Uniform; air cool to room temperature after homogenization.

[0038] 3) Pretreatment of blanks and molds before forging, including:

[0039] a. Surface lubrication: Coating graphite lubricant on the surface of the mold cavity and the surface of the billet, the ...

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Abstract

The invention relates to a forging forming method for magnesium alloy rings. The method includes the steps of blanking, homogenization treatment of blanks, pretreatment of the blanks and a die before forging, multidirectional free forging performing, die forging and finish forging forming and the like. In order to solve the problems of magnesium alloy ring part forming process complexity, easiness in cracking of forging forming and the like, forged magnesium alloy rings are successfully produced by combining multidirectional free forging performing with die forging and finish forging forming, by means of reasonably selecting technological parameters of forging temperature, press-down rate, deformation and the like, and by mutual linking and matching of processes. Auxiliary processes such as extrusion breakdown and the like are omitted, forming processing of the forged rings can be completed only on one hydraulic press, production efficiency is high, the rings are good in size precision and stability, the produced rings are full in mold filling, free of defects such as cracks, folds and the like, and compact in internal texture.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy processing, and in particular relates to a forging forming process method of a magnesium alloy ring. Background technique [0002] Ring products are widely used in aerospace, automobiles, trains, ships, machinery, wind power and many other industrial fields. Ring materials are usually steel and aluminum alloy. With the development of aerospace and weapons industries, there is an urgent need for lightweight materials. Magnesium alloy is the lightest metal structure material in practical application, and has better specific strength and specific stiffness than aluminum alloy and steel. Using magnesium alloy to make ring products can effectively reduce the weight of the structure and improve the carrying capacity. Forging forming is one of the main methods for large-scale production of rings, which has the advantages of high productivity, good shape and dimensional stability of forgings, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B23P13/00
Inventor 张静黄浩豆雨辰
Owner CHONGQING UNIV
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