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Preparation method of rare earth magnesium alloy and sheet thereof

A rare earth magnesium and alloy technology, applied in the field of metal materials, can solve the problems of alloy economy and room temperature deformation ability to be improved, failure to examine alloy thermal stability, etc., to achieve large-scale production and application, reduce metallurgical defects, product Dimensionally accurate effects

Active Publication Date: 2014-06-18
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the above three patents, CN200910011111.1A improved the plastic deformation performance of the alloy at room temperature by adding rare earth elements and controlling the hot rolling process, but did not involve its thermal stability; although CN201210124363.7 obtained good room temperature and high temperature tensile strength, but the economy and room temperature deformability of the alloy still need to be improved. CN200410081258.5 refines the grain by adding rare earth element Y, the room temperature tensile strength and plastic deformation ability of the alloy are improved, and the same is not Can examine the thermal stability of the alloy

Method used

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  • Preparation method of rare earth magnesium alloy and sheet thereof
  • Preparation method of rare earth magnesium alloy and sheet thereof
  • Preparation method of rare earth magnesium alloy and sheet thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]The square cast ingot with a thickness of 100mm produced by the semi-continuous casting method in this embodiment, the mass percent of the alloy composition is: Zn 1%, Gd 1%, Zr 0.3%, and the rest is Mg;

[0033] 1. The alloy square ingot is homogenized at 400°C for 48 hours, and then cooled with water;

[0034] 2. Keep the milled blank at 400°C for 4 hours; at the same time, preheat the roll to 250°C, and start rolling for 6 passes, with a reduction of 30% for each pass. After the 2nd and 4th passes, return to the furnace and heat to 400°C for 30 minutes and then continue rolling. The reduction in the last pass is 40%, and the total reduction is 90%;

[0035] 3. The plate after hot rolling is annealed at 300°C for 2 hours;

[0036] 4. After hot-rolling, the plate is cold-rolled 4 times at room temperature, with a reduction of 15% in each pass and a total reduction of 52%;

[0037] 5. The cold-rolled sheet is then annealed at 300°C for 30 seconds;

Embodiment 2

[0039] The square cast ingot with a thickness of 100mm produced by the semi-continuous casting method in this embodiment, the mass percent of the alloy composition is: Zn 1%, Gd 2%, Zr 0.6%, and the rest is Mg;

[0040] 1. The alloy square ingot is homogenized at 450°C for 24 hours, and then cooled with water;

[0041] 2. Keep the milled billet at 450°C for 2 hours; at the same time, preheat the roll to 280°C, and start rolling for 6 passes, with a reduction of 35% for each pass. After the 2nd and 4th passes, return to the furnace and heat to 450°C for 45 minutes and then continue rolling. The reduction in the last pass is 30%, and the total reduction is 94%;

[0042] 3. The plate after hot rolling is annealed at 350°C for 12 hours;

[0043] 4. After hot-rolling, the plate is cold-rolled 3 times at room temperature, the reduction of each pass is 15%, and the total reduction is 40%;

[0044] 5. The cold-rolled sheet is then annealed at 400°C for 1 minute;

Embodiment 3

[0046] In this embodiment, a square ingot with a thickness of 100mm is produced by semi-continuous casting method, and the mass percentage of the alloy composition is: Zn 2%, Gd 2%, Zr 0.3%, and the rest is Mg.

[0047] 1. The alloy square ingot is homogenized at 520°C for 10 hours, and then cooled with water;

[0048] 2. Keep the milled blank at 500°C for 1 hour; at the same time, preheat the roll to 300°C, and start rolling for 4 passes, and the reduction in each pass is 40%. After the second pass, return to the furnace and heat to 500°C for 45 minutes and then continue rolling. The reduction in the last pass is 20%, and the total reduction is 85%;

[0049] 3. The plate after hot rolling is annealed at 400°C for 1 hour;

[0050] 4. After hot-rolling, the medium-thick plate is cold-rolled 4 times at room temperature, the reduction of each pass is 10%, and the total reduction is 35%;

[0051] 5. The cold-rolled sheet is then annealed at 450°C for 60 seconds;

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Abstract

The invention provides a rare earth magnesium alloy. The rare earth magnesium alloy is characterized by comprising the following components by mass percent: 0.5 to 4.0% of Zn, 0.1 to 2% of Gd, 0.3 to 0.9% of Zr, and the balance of Mg. The preparation method of the rare earth magnesium alloy sheet comprises the following steps of: treating a rare earth magnesium alloy ingot casting by uniform annealing; cooling with water; milling the surface; preheating a milled blank; rolling for four to eight times; melting down and heating once every two to three times after rolling; continuously rolling, wherein the total rolling reduction is 70 to 95%; annealing the sheet subjected to hot rolling; performing cold rolling for a moderate-thickness sheet subjected to hot rolling for two to four times; and then annealing the sheet subjected to cold rolling to obtain the rare earth magnesium alloy sheet. The invention also provides a preparation method of the rare earth magnesium alloy and the sheet thereof. The rare earth magnesium alloy sheet is high in plasticity and high in heat stability. Compared with hot rolling, cold rolling has the advantage that the magnesium alloy can be prevented from being oxidized into a film during heating; in addition, the prepared sheet is accurate in dimension and uniform in thickness; a thin belt which cannot be produced by hot rolling can be obtained; and mass production and application can be realized.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a preparation method of a rare earth magnesium alloy and a thin plate (0.4-2mm) thereof. Specifically, according to the enhancement effect of rare earth elements on the plasticity of magnesium alloys, an appropriate amount of rare earth elements is added on the basis of traditional magnesium alloys, and by controlling the subsequent hot rolling, cold rolling and subsequent heat treatment processes, rare earth magnesium alloys with high plasticity and high thermal stability are obtained. sheet. Background technique [0002] Magnesium alloy has the characteristics of high specific strength and specific stiffness, good casting performance, excellent electromagnetic shielding and damping performance, and can be recycled and reused. It has broad application prospects in the fields of aerospace, transportation, electronic communications, optical instruments, and computer manufacturing. . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C23/06C22C23/00C22F1/06
Inventor 黎小辉戚文军宋东福郑开宏周楠徐静甘春雷
Owner GUANGDONG INST OF NEW MATERIALS
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