Method for achieving ATX series magnesium alloy plate texture weakening through asymmetric extrusion

An asymmetric, magnesium alloy technology, applied in the field of magnesium alloy hot extrusion forming, ATX magnesium alloy sheet texture weakening, can solve the problems of high technical difficulty, texture weakening, and low processing efficiency

Active Publication Date: 2021-03-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art above, the present invention is based on a magnesium alloy asymmetric continuous large-deformation extrusion die and a magnesium alloy asymmetric continuous large-deformation extrusion molding method disclosed in patents CN109622648B and CN109604365B. The mold core was improved, and an asymmetric extrusion die was designed. The purpose was to provide a method for realizing the weakening of the texture of the ATX magnesium alloy sheet by asymmetric extrusion, and to solve the low processing efficiency existing in the existing method of weakening the texture of the sheet. , technically difficult problems, and also provide new ideas and new options for asymmetric extrusion deformation

Method used

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  • Method for achieving ATX series magnesium alloy plate texture weakening through asymmetric extrusion
  • Method for achieving ATX series magnesium alloy plate texture weakening through asymmetric extrusion
  • Method for achieving ATX series magnesium alloy plate texture weakening through asymmetric extrusion

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Effect test

Embodiment 1

[0031] Homogenize the Mg-2Al-0.8Sn-0.18Ca (ATX2102) magnesium alloy ingot after peeling: first heat to 320°C for 2 hours, then raise the temperature to 430°C for 3 hours, and finally hold at 490°C for 2 hours. Then, the homogenized ATX2102 magnesium alloy ingot was subjected to conventional extrusion at an extrusion speed of 15mm / s, an extrusion temperature of 410°C, and an extrusion ratio of 30 to obtain an ATX2102 magnesium alloy sheet with a width of 60mm and a thickness of 10mm. Install the asymmetric extrusion die on a vertical hydraulic press. The molding channel of the die divides the die cavity into left and right sides at a ratio of 3:2. The die cavity and the surface of the billet are evenly coated with water-based graphite lubricant and heated to 350°C and 370°C for 2 hours, extrusion ratio 30, asymmetric extrusion at 2mm / s, cooled to room temperature, and finally an ATX2102 magnesium alloy sheet with a width of 10mm and a thickness of 2mm.

Embodiment 2

[0033] Homogenize the Mg-2Al-0.8Sn-0.28Ca (ATX2103) magnesium alloy ingot after peeling: first heat to 330°C for 2 hours, then raise the temperature to 420°C for 3 hours, and finally hold at 480°C for 2 hours. Then, the homogenized ATX2103 magnesium alloy ingot was subjected to conventional extrusion at an extrusion speed of 20 mm / s, an extrusion temperature of 400° C., and an extrusion ratio of 25 to obtain an ATX2103 magnesium alloy sheet with a width of 50 mm and a thickness of 8 mm. Install the asymmetric extrusion die on a vertical hydraulic press. The molding channel of the die divides the die cavity into left and right sides at a ratio of 3:1. The die cavity and the surface of the billet are evenly coated with water-based graphite lubricant and heated to 370°C and 390°C for 2 hours, extrusion ratio 25, asymmetric extrusion at 3mm / s, cooled to room temperature, and finally an ATX2103 magnesium alloy sheet with a width of 8mm and a thickness of 2mm.

Embodiment 3

[0035] Homogenize the Mg-2Al-0.8Sn-0.5Ca (ATX2105) magnesium alloy ingot after peeling: first heat to 350°C for 2 hours, then raise the temperature to 420°C for 3 hours, and finally hold at 490°C for 2 hours. Then, the homogenized ATX2105 magnesium alloy ingot was subjected to conventional extrusion at an extrusion speed of 25mm / s, an extrusion temperature of 400°C, and an extrusion ratio of 25 to obtain an ATX2105 magnesium alloy sheet with a width of 55mm and a thickness of 10mm. Install the asymmetric extrusion die on a vertical hydraulic press. The molding channel of the die divides the die cavity into left and right sides at a ratio of 4:1. The die cavity and the surface of the billet are evenly coated with water-based graphite lubricant and heated to 400°C and 420°C for 2h, extrusion ratio 27.5, asymmetric extrusion at 3mm / s, cooled to room temperature, and finally an ATX2105 magnesium alloy sheet with a width of 10mm and a thickness of 2mm.

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Abstract

The invention discloses a method for achieving ATX series magnesium alloy plate texture weakening through asymmetric extrusion, and belongs to the technical field of magnesium alloy extrusion machining. The method comprises the following steps that an ATX series magnesium alloy ingot blank is homogenized, then a magnesium alloy plate is prepared by conventional extrusion, and the extruded plate ispreheated and put in an asymmetric extrusion die for being extruded. The central axis of a forming channel hole of the asymmetric extrusion die does not coincide with the central axis of an extrusiondie cavity, the proportions of blanks located on the left side and the right side of the forming channel hole in the die cavity are different, extra upsetting deformation is generated in the extrusion process of part of the blanks, the whole extrusion deformation process can be regarded as upsetting and extrusion deformation composite superposition, and therefore, the texture of the finally obtained asymmetric extrusion plate is obviously weakened compared with that of an initial extrusion plate. The asymmetric extrusion die is simple and convenient to manufacture, simple in technological operation and easy to implement, and has a good industrial application prospect.

Description

technical field [0001] The invention relates to a magnesium alloy hot extrusion forming technology, in particular to a method for realizing weakening of the texture of an ATX series magnesium alloy plate by using asymmetric extrusion, and belongs to the technical field of magnesium alloy extrusion processing. Background technique [0002] As the metal structure material with the lowest density, magnesium alloy has the advantages of high specific strength, good shock absorption and electromagnetic shielding. It has important application value and broad application prospect in automobile, transportation, aerospace and other fields. Magnesium alloy has a close-packed hexagonal crystal structure, so there are few independent slip systems at room temperature, and the deformation at room temperature is mainly based on basal plane slip, and the forming ability is poor. [0003] Invention patent CN103255329B discloses a low-cost fine-grained and weakly textured magnesium alloy shee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/00B21C25/02B21C23/06B21C29/00
CPCB21C23/001B21C23/002B21C23/06B21C25/02B21C29/003
Inventor 李志刚张子乐苗源马品奎贾红杰刘丰宁
Owner JILIN UNIV
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