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Cerium-rich mischmetal-containing high-strength heat-resisting magnesium alloy and preparation method thereof

A cerium-rich mixed rare earth and mixed rare earth technology, which is applied in the field of industrial magnesium alloy, high-strength heat-resistant magnesium alloy and its preparation and processing, to achieve the effects of high mechanical properties, high safety, and high-temperature creep resistance

Inactive Publication Date: 2012-06-06
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, it solves the problem of comprehensive utilization of rare earth resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: 1000 kilograms of Mg-6.5Y-0.7 rich cerium mixed rare earth metal-0.4Zr magnesium alloy (the composition content of this magnesium alloy is: Y6.5wt%, rich cerium mixed rare earth 0.7wt%, Zr0.4wt%, the rest is Mg; wherein, the composition content of the cerium-rich mixed rare earth is: Ce: 50wt%; La: 30wt%; Nd: 15wt%; Pr: 5wt%) and the workpiece forging processing method.

[0039] 1. Melting preparation

[0040] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 160-260°C, raise the temperature of the melting furnace to 600-620°C, and pass protective gas (2-15% SO 2 +N 2 ).

[0041] 2. Preheating of pure Y ingot, misch metal ingot and Mg-30wt% Zr (Zr: 30wt%, the rest is Mg) master alloy ingot

[0042] Use a preheating furnace to preheat 915 kg of pure magnesium ingots, 65 kg of pure Y ingots, 7 kg of rich mixed rare earth metal ingots and 13 kg of Mg-30% Zr intermedi...

Embodiment 2

[0058] Embodiment 2: 1000 kilograms of Mg-15Y-3 cerium-rich mixed rare earth metal-1.2Zr magnesium alloy (the composition content of this magnesium alloy is: Y15wt%, rich cerium mixed rare earth 3wt%, Zr1.2wt%, the rest is Mg; wherein , the component content of cerium-rich mixed rare earth is: Ce: 50wt%; La: 30wt%; Nd: 15wt%; Pr: 5wt%) and the rod extrusion processing method thereof.

[0059] 1. Melting preparation

[0060] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace to 600-620°C, and pass protective gas (2-15% SO 2 +N 2 ).

[0061] 2. Preheating of pure Y ingot, misch metal ingot and Mg-30wt% Zr (Zr: 30wt%, the rest is Mg) master alloy ingot

[0062] Use a preheating furnace to preheat 780 kg of pure magnesium ingots, 150 kg of pure Y ingots, 30 kg of rich mixed rare earth metal ingots and 40 kg of Mg-30% Zr intermediate a...

Embodiment 3

[0078] Embodiment 3: 1000 kilograms of Mg-7.5Y-2 cerium-rich mixed rare earth metal-0.7Zr (the composition content of this magnesium alloy is: Y7.5wt%, rich cerium mixed rare earth 2wt%, Zr0.7wt%, the rest is Mg; Wherein, the composition content of the cerium-rich mixed rare earth is: Ce: 50wt%; La: 30wt%; Nd: 15wt%; Pr: 5wt%) magnesium alloy and its plate rolling processing method.

[0079] 1. Melting preparation

[0080] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 260-360°C, raise the temperature of the melting furnace to 600-620°C, and pass protective gas (2-15% SO 2 +N 2 ).

[0081] 2. Preheating of pure Y ingot, misch metal ingot and Mg-30%Zr (Zr: 30wt%, the rest is Mg) master alloy ingot

[0082] Use a preheating furnace to preheat 882 kg of pure magnesium ingots, 75 kg of pure Y ingots, 20 kg of rich mixed rare earth metal ingots and 23 kg of Mg-30% Zr intermediate alloy ...

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Abstract

The invention discloses a cerium-rich mischmetal-containing high-strength heat-resisting magnesium alloy and a preparation method thereof. The cerium-rich mischmetal-containing high-strength heat-resisting magnesium alloy comprises: by weight, 6.5 to 15% of Y, 0.7 to 3.0% of cerium-rich mischmetal, 0.4 to 1.2% of Zr and the balance Mg. The preparation method comprises the following steps of 1, preparing raw materials, pre-heating a pure magnesium ingot, a pure Y ingot, a cerium-rich mischmetal ingot and a Mg-Zr intermediate alloy ingot, melting the pre-heated pure magnesium ingot, dissolving the pre-heated pure Y ingot, the pre-heated cerium-rich mischmetal ingot and the pre-heated Mg-Zr intermediate alloy ingot in the magnesium melt to obtain magnesium alloy melt, and pouring or casting the magnesium alloy melt into a magnesium alloy ingot blank, 2, carrying out uniformization heat treatment through processes of 1), heating the magnesium alloy ingot blank to a temperature of 490 to 540 DEG C and 2), carrying out heat preservation for 10 to 60 hours so that the alloy elements of Y, cerium-rich mischmetal and Zr are uniformly distributed in the base metal, 3, carrying out thermal deformation processing, 4, carrying out waste heat quenching processing, and 5, carrying out aging treatment. The cerium-rich mischmetal-containing high-strength heat-resisting magnesium alloy can satisfy requirements of high mechanical properties and high-temperature creep-resistant properties. The thermal deformation processing is directly carried out after the uniformization heat treatment and the waste heat quenching and the aging treatment are adopted, and thus the preparation method can solve the problems of poor reinforcement effects and poor stability of cerium-rich mischmetal alloy elements of Ce, La and Pr in magnesium.

Description

technical field [0001] The invention relates to a high-strength heat-resistant magnesium alloy containing cerium-rich mixed rare earths and a preparation and processing method thereof. The so-called cerium-rich mixed rare earth metals are rare earth metal mixtures mainly containing Ce, La, Nd, and Pr, wherein Ce is about 50wt%, La is about 30 wt%, Nd is about 15 wt%, and Pr is about 5 wt%. It belongs to the category of industrial magnesium alloys. Background technique [0002] At present, with the continuous improvement of energy saving, environmental protection and automobile performance requirements, magnesium alloys have low density, high specific strength and rigidity, good casting performance, especially easy to die-cast, in addition to excellent vibration damping performance and easy recycling. Advantages, the application in the automotive industry is booming. With the continuous expansion of the application of magnesium alloys in automobiles, people are also develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06
Inventor 张奎李兴刚李永军马志新马鸣龙张凤岗王强曹忠
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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