Extruding, forging and rolling integrated technology of AQ80M magnesium alloy annular part

A technology for ring parts and magnesium alloys, which is applied in the field of deformation processing of magnesium alloys, extrusion of AQ80M magnesium alloys, forging and ring rolling deformation. Problems such as narrow thermal deformation temperature range can reduce the risk of billet cracking, grain refinement, and avoid grain growth

Inactive Publication Date: 2017-07-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain difficulties in the preparation of magnesium alloy ring parts: magnesium alloy has poor plasticity at room temperature, narrow thermal deformation temperature range, large billet size required for ring rolling, and difficult to process and prepare high-quality billets
In order to solve these problems, it is necessary to use a suitable blanking process and strictly control the deformation process parameters; however, there is currently a lack of relevant research on the forming process of magnesium alloy rings

Method used

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  • Extruding, forging and rolling integrated technology of AQ80M magnesium alloy annular part
  • Extruding, forging and rolling integrated technology of AQ80M magnesium alloy annular part
  • Extruding, forging and rolling integrated technology of AQ80M magnesium alloy annular part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] AQ80M magnesium alloy ingots of Φ620mm×1800mm were cast by semi-continuous casting, and double-stage homogenization heat treatment was performed in an annealing furnace. The homogenization process: 250°C×8h+415°C×44h. After cooling to room temperature, the ingot is subjected to mechanical turning, cutting, rounding, etc., and an ingot of Φ580mm×1400mm is processed. The ingot is extruded into a round bar with a diameter of Φ400mm on a hot extrusion machine, the extrusion temperature is 370°C, and the extrusion speed is 0.3mm / s. figure 1 For extrusion billet round bar. After air cooling to room temperature, the extruded round bar is cut and blanked into a Φ400mm×1040mm billet. The ingot is kept at 410°C for 10 hours, and the first fire forging is carried out on the hydraulic press: the two radial directions of the height and the vertical of the cylindrical ingot are taken as the Z, Y and X directions, and four passes are first carried out along the Z, Y and X directions ...

Embodiment 2

[0027] AQ80M magnesium alloy ingots of Φ620mm×1800mm were cast by semi-continuous casting, and double-stage homogenization heat treatment was performed in an annealing furnace. The homogenization process: 250°C×8h+415°C×44h. After cooling to room temperature, the ingot is subjected to mechanical turning, cutting, rounding, etc., and an ingot of Φ580mm×1400mm is processed. The ingot is extruded into a round bar with a diameter of Φ400mm on a hot extrusion machine. The extrusion temperature is 370°C and the extrusion speed is 0.3mm / s. After air cooling to room temperature, the extruded round bar is cut and blanked into a Φ400mm×910mm ingot Blank. The ingot is kept at 410°C for 10 hours, and the first fire forging is carried out on the hydraulic press: the two radial directions of the height and the vertical of the cylindrical ingot are taken as the Z, Y and X directions, and four passes are first carried out along the Z, Y and X directions First upsetting, pass reduction 15-20%...

Embodiment 3

[0030] Table 1 Tensile mechanical properties of rings at room temperature in the examples

[0031]

[0032] Table 2 Tensile mechanical properties of rings at 150°C in the examples

[0033]

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Abstract

The invention discloses an extruding, forging and rolling integrated technology of an AQ80M magnesium alloy annular part. The technology comprises the steps of semi-continuous casting, homogenizing annealing, heat extrusion, multi-direction forging, mechanical hole punching and annular part rolling. The extruding, forging and rolling integrated technology can be used for producing and preparing the AQ80M magnesium alloy annular part which is free of cracks on the surface, uniform in structure, good in comprehensive mechanics property, small in mechanical anisotropy and large in size, the annular part can be used for replacing annular parts made of other materials, the effects of reducing weight, improving the fuel efficiency and achieving electromagnetic shielding are achieved, and the technology has the important application value in aerospace and national defense fields.

Description

technical field [0001] The invention belongs to the field of magnesium alloy deformation processing, in particular to the field of extrusion, forging and ring rolling deformation of an AQ80M magnesium alloy. Background technique [0002] Large-size ring parts are important structural parts of aircraft, rockets, and missiles. At present, traditional alloys such as aluminum alloys and titanium alloys are the main materials for making ring parts. Magnesium alloys are known as "green engineering materials in the 21st century" because of their advantages such as low density, high specific strength, good damping performance, recyclability and pollution-free, and have become the structural materials with the most development potential in the fields of aerospace, national defense and military industry. one. Therefore, magnesium alloy becomes a potential ring material to meet the requirements of reducing weight and improving fuel efficiency. At present, ring rolling is the main pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C22F1/06B21J5/08B21H1/06B21C23/08
CPCB23P15/00B21C23/08B21H1/06B21J5/08C22F1/06
Inventor 刘楚明曾钢蒋树农高永浩魏建胜
Owner CENT SOUTH UNIV
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