Magnesium alloy multi-pass forming process design method based on fine grains

A technology of forming process and design method, applied in the field of fine-grained magnesium alloy multi-pass forming process design, can solve problems such as low efficiency and poor accuracy

Active Publication Date: 2021-06-04
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Description
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  • Application Information

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Problems solved by technology

Clearly, existing methods for determining the forming process

Method used

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  • Magnesium alloy multi-pass forming process design method based on fine grains
  • Magnesium alloy multi-pass forming process design method based on fine grains

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Embodiment

[0017] A fine-grain-based multi-pass forming process design method for magnesium alloys. Specifically, AZ80 magnesium alloy blanks are used to form special-shaped bobbin magnesium alloy components. The steps are as follows:

[0018] Step 1. Taking the initial grain size, strain amount, deformation temperature, and deformation rate of the AZ80 magnesium alloy billet as variables, and the grain size of the deformed special-shaped tube magnesium alloy component as the target, carry out the reverse extrusion orthogonal test. Different factors (Under the conditions) the grain size after back extrusion is shown in Table 1,

[0019] Table 1 Grain size after back extrusion under different factors (under conditions)

[0020] Initial grain size / μm strain / % Deformation temperature / ℃ Deformation rate / s -1

Grain size after deformation / μm 50.5 20 400 0.001 35.4 50.5 20 400 0.01 27.8 50.5 20 400 0.1 25.3 50.5 20 370 0.001 24.8 50.5 2...

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Abstract

The invention provides a magnesium alloy multi-pass forming process design method based on fine grains, which comprises the following steps of: designing a plurality of groups of backward extrusion orthogonal tests by taking an initial grain size, a dependent variable, a deformation temperature and a deformation rate of a magnesium alloy blank as variables and taking a grain size of a deformed magnesium alloy part as a target; obtaining the action rule of each factor on the grain size of the deformed magnesium alloy part; determining the forming process and frequency of the magnesium alloy part according to the shape characteristics of the magnesium alloy part; carrying out numerical simulation on each pass of forming process, and analyzing and recording a strain distribution value of the part; According to the initial grain size and the dependent variable of each pass, the grain size after deformation required by the pass and an orthogonal test result, forming parameters are selected. According to the method, deformation parameters of each pass in the forming process of the magnesium alloy part can be accurately controlled, accurate control over the grain size of the final part can be quickly achieved, and the comprehensive mechanical property of the magnesium alloy part can be improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy forming process design, and in particular relates to a fine-grained magnesium alloy multi-pass forming process design method. Background technique [0002] Magnesium alloy has the characteristics of low density, high specific strength and excellent electromagnetic shielding performance, and its application in the fields of aerospace and national defense is gradually increasing. However, in the preparation of deformed components, on the basis of meeting high performance, it is necessary Realize the refinement of blanks to save materials, improve material utilization and reduce material costs. The refinement of the blank requires multi-pass precision forming, but the problem of grain growth will occur in the multi-pass forming process of magnesium alloys. Every time it is heated before forming, its performance will decrease once, which will directly affect the performance of the final compon...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F30/17B21C23/20G06F111/10G06F113/26G06F119/14G06F119/08
CPCG06F30/20G06F30/17B21C23/002B21C23/20G06F2111/10G06F2113/26G06F2119/14G06F2119/08Y02P90/30
Inventor 夏祥生胡传凯黄少东黄树海林军康凤舒大禹陈强
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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