Method for manufacturing high-plasticity/formability deforming magnesium alloy plate

A wrought magnesium alloy and formability technology, which is applied in the field of manufacturing wrought magnesium alloy sheets with high plasticity/formability, can solve problems such as difficulty in obtaining low-cost wrought magnesium alloy sheets, unfavorable secondary formability of sheets, and unfavorable overall performance of sheets. Achieve excellent room temperature plasticity and subsequent secondary forming ability, improve the degree of uniform strain, and shorten the effect of rolling production process

Active Publication Date: 2016-05-25
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high deformation temperature (≥300°C), small pass deformation (≤25%), and the need for multiple intermediate heating, the traditional magnesium alloy sheet produced by hot rolling technology results in complicated process and low yield. Low, difficult to obtain low cost wrought magnesium alloy sheet
At the same time, its coarse grain structure is not conducive to the improvement of the overall performance of the plate.
In addition, there is a strong {0002} basal texture of the sheet after rolling, which will lead to a high yield ratio (≥0.8) and a low work hardening rate, which is extremely unfavorable for the secondary formability of the sheet

Method used

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  • Method for manufacturing high-plasticity/formability deforming magnesium alloy plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Put 1641g of pure magnesium ingots and 45g of pure zinc into a vacuum induction melting furnace, under the protection of high-purity argon, melt at 750±3°C and hold for 30min, then add 12gMg-30wt.%Zr, 6gMg-30wt.%Ca , 48gMg-30wt.%Y, 38gMg-30wt.%Gd and 10gMg-30wt.%Nd master alloys were kept for 2h, and finally cooled to 680±3°C, stood for 20min, and poured. In this way, the composition is Mg-2.5wt.%Zn-0.2wt.%Zr-0.1wt.%Ca-1.6wt.%RE, and the size is a magnesium alloy round ingot of Φ110mm×85mm (the size after removing the riser); Subsequently, a homogenization treatment was carried out at 425±3°C×12h under an argon protective atmosphere to homogenize the structure and eliminate segregation and solid-solution intergranular phases.

[0065] Turning to remove the oxide skin on the surface of the round ingot, and cut it into an extrusion test piece of Φ100mm×80mm. After preheating at 200±3°C for 0.5h, extrude it into a 100mm wide×8mm magnesium alloy slab at one time. The extrus...

Embodiment 2

[0071] Put 1671g of pure magnesium ingots and 27g of pure zinc into a vacuum induction melting furnace, under the protection of high-purity argon, melt at 730±3°C and hold for 30min, then add 30gMg-30wt.%Zr, 12gMg-30wt.%Ca , 30gMg-30wt.%Y, 24gMg-30wt.%Gd and 6gMg-30wt.%Nd master alloys were kept for 1.0h, and finally cooled to 675±3°C, stood for 20min, and poured. Make composition Mg-1.5wt.%Zn-0.5wt.%Zr-0.2wt.%Ca-1.0wt.%RE like this, size is the magnesium alloy round ingot of Φ 110mm * 85mm (dimension after removing riser); Under the protective atmosphere of argon, the homogenization treatment is carried out at 400±3℃×8h to homogenize the structure and eliminate segregation and solid solution intergranular phase.

[0072] Turning to remove the oxide skin on the surface of the round ingot, and cut it into an extrusion test piece of Φ100mm×80mm. After preheating at 200±3°C for 0.5h, extrude it into a magnesium alloy slab of 100mm wide×6mm at one time. The extrusion ratio is 13,...

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Abstract

The invention discloses a method for manufacturing a high-plasticity / formability deforming magnesium alloy plate. The method comprises the following steps: a) providing a magnesium alloy composed of 2.5-4.5 wt.% of Zn, 0-0.5 wt.% of Zr, 0-0.3 wt.% of Ca, 0-1.6 wt.% of RE, less than 0.02 wt.% of total impurity elements and the balance of Mg, wherein the RE is selected from one or more of Y, Gd and Nd; b) carrying out low-temperature extrusion on the magnesium alloy, wherein the initial temperature of the magnesium alloy is room temperature to 200 DEG C; c) carrying out multipass cooling asynchronous rolling on the pre-extruded magnesium alloy, wherein the accumulated strain amount is 0.8-3.0; carrying out one-pass cold rolling reshaping; and d) directly carrying out annealing treatment on the rolled magnesium alloy plate, thereby obtaining the high-plasticity / formability deforming magnesium alloy plate.

Description

technical field [0001] The present application generally relates to the field of metallurgy and plastic working of metallic materials. More specifically, the present application relates to methods of manufacturing highly plastic / formable wrought magnesium alloy sheets. Background technique [0002] Magnesium alloy has the characteristics of low density, high specific strength and specific stiffness, good thermal fatigue, thermal conductivity and damping performance, excellent electromagnetic shielding performance and machining performance, etc. Various fields have extensive application value. Our country vigorously develops the magnesium alloy industry, not only has a strong resource advantage, but also has a huge market demand. Realizing the large-scale application of wrought magnesium alloy sheets in the field of lightweight structural parts has extremely important application value and broad application prospects. [0003] However, due to the high deformation temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06C22C23/04
CPCC22C23/04C22F1/06
Inventor 陈文振张文丛王文珂
Owner HARBIN INST OF TECH AT WEIHAI
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