A Method for Realizing Texture Weakening of Atx Series Magnesium Alloy Sheets Using Asymmetric Extrusion

A magnesium alloy, asymmetric technology, applied in the field of ATX magnesium alloy sheet texture weakening, magnesium alloy hot extrusion forming, can solve the problems of low processing efficiency, technical difficulty, texture weakening, etc., to achieve sufficient deformation, easy The effect of increasing the deformation zone and reducing the dead zone

Active Publication Date: 2021-09-28
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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  • A Method for Realizing Texture Weakening of Atx Series Magnesium Alloy Sheets Using Asymmetric Extrusion
  • A Method for Realizing Texture Weakening of Atx Series Magnesium Alloy Sheets Using Asymmetric Extrusion
  • A Method for Realizing Texture Weakening of Atx Series Magnesium Alloy Sheets Using Asymmetric Extrusion

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Embodiment 1

[0031] The Mg-2Al-0.8 SN-0.18CA (ATX2102) magnesium alloy ingot was taken up and treated: first heated to 320 ° C for 2 h, and then heated to 430 ° C for 3 h, and finally held at 490 ° C for 2 h. Subsequently, the ATX2102 magnesium alloy ingot after homogenization is conventional extrusion, the extrusion rate is 15 mm / s, the extrusion temperature is 410 ° C, the extrusion ratio is 30, and the width is 60 mm, the thickness of 10 mm ATX2102 magnesium alloy sheet. Installing an asymmetric extrusion mold on a vertical hydraulic press, the molded passage of the mold divides the cavity to the left and right sides, uniformly coating the moisture graphite lubricant surface on the surface of the cavity and the blank, and heated to The 350 ° C and 370 ° C were insulated for 2 h, and the extrusion ratio 30 was discharged from 2 mm / s, cooled to room temperature, and finally obtained an ATX2102 magnesium alloy sheet having a width of 10 mm thick.

Embodiment 2

[0033] MTA (ATX2103) magnesium alloy ingot was taken up and treated with a homogenization treatment: first heated to 330 ° C for 2 h, and then heated to 420 ° C for 3 h, and finally held at 480 ° C for 2 h. Subsequently, the ATX2103 magnesium alloy ingot after homogenization is conventional extrusion, the extrusion rate is 20 mm / s, the extrusion temperature is 400 ° C, the extrusion ratio is 25, and the width is 50 mm, the thickness of 8 mm ATX2103 magnesium alloy sheet. Installing an asymmetric extrusion mold on a vertical hydraulic press, the molded passage of the mold divides the cavity to the left and right sides, uniformly coating the moisture graphite lubricant surface on the surface of the cavity and the blank, and heated to 370 ° C and 390 ° C were held for 2 h, and the extrusion ratio 25 was discharged from 3 mm / s, cooled to room temperature, and finally obtained an ATX2103 magnesium alloy plate having a width of 8 mm thick.

Embodiment 3

[0035] Mental treatment was taken after the magnesium alloy ingot of Mg-2Al-0.8 S-0.5 Ca (ATX2105) was first heated to 350 ° C for 2 h, and then heated to 420 ° C for 3 h, and finally held at 490 ° C for 2 h. Subsequently, the ATX2105 magnesium alloy ingot after homogenization is conventionally extruded, the extrusion rate is 25 mm / s, the extrusion temperature is 400 ° C, the extrusion ratio is 25, and the width is 55 mm, the thickness of 10 mm ATX2105 magnesium alloy sheet. Installing an asymmetric extrusion mold on a vertical hydraulic press, the molded passage of the mold divides the cavity to the left and right sides, uniformly coating the surface of the cavity and the blank surface, and heated to 400 ° C and 420 ° C were insulated for 2 h, and the extrusion ratio was 27.5, and unmistically squeezed at 3 mm / s, cooled to room temperature, and finally obtained an ATX2105 magnesium alloy sheet having a width of 10 mm thickness of 2 mm.

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Abstract

The invention discloses a method for realizing the weakening of the texture of an ATX series magnesium alloy plate by adopting asymmetric extrusion, and belongs to the technical field of magnesium alloy extrusion processing. In the invention, the ATX series magnesium alloy ingot is homogenized firstly, then the magnesium alloy plate is prepared by conventional extrusion, and finally the extruded plate is preheated and put into an asymmetric extrusion die for extrusion. Since the central axis of the forming channel hole of the asymmetric extrusion die does not coincide with the central axis of the extrusion die cavity, the proportion of the billets on the left and right sides of the forming channel hole in the mold cavity is different, and extra parts of the billet will be upset during the extrusion process. Coarse deformation, the entire extrusion deformation process can be regarded as the combined superposition of upsetting and extrusion deformation, so the texture of the finally obtained asymmetric extruded sheet is obviously weaker than that of the initial extruded sheet. The asymmetric extrusion die is easy to manufacture, simple to operate and easy to implement, and has good industrial application prospects.

Description

Technical field [0001] The present invention relates to magnesium alloy heat extrusion forming techniques, and more particularly to a method of fabricating the weakening of ATX-based magnesium alloy sheet using asymmetric extrusion, belonging to the field of magnesium alloy extrusion processing technology. Background technique [0002] The magnesium alloy is a metal structural material with a minimum density, which has the advantages of high strength, damping shock absorption, and electromagnetic shieldability. It has important application value and broad application prospects in the fields of automobiles, transportation, aerospace and other fields. The magnesium alloy is a tangled hexagonal crystal structure, so the independent slip is small, and the room temperature deformation is mainly based on the base surface, and the forming ability is poor. [0003] One low-cost fine crystal weakeg magnesium alloy sheet and the manufacturing method thereof, which are lanes, which have a w...

Claims

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Application Information

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Patent Type & Authority Patents(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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