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Rare earth-magnesium alloy and preparation method thereof

A rare earth magnesium and magnesium alloy technology, applied in the field of metal materials, can solve the problems of inapplicability to large-scale production, alloy ratio, smelting and forming process, etc., and achieve high-temperature mechanical properties, good formability, and thermal conductivity. Good results

Inactive Publication Date: 2016-04-06
KA SHUI TECH HUIZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current rare earth magnesium alloy is still in the research and development stage, and its alloy ratio, smelting and forming processes are not mature, and cannot be applied to large-scale production

Method used

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  • Rare earth-magnesium alloy and preparation method thereof
  • Rare earth-magnesium alloy and preparation method thereof
  • Rare earth-magnesium alloy and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a method for preparing the rare earth magnesium alloy described in the above technical solution, comprising the following steps:

[0039] (1) preheating metal Mg and other alloy raw materials;

[0040] (2) smelting the preheated metal Mg to obtain molten magnesium;

[0041] (3) alloying the magnesium liquid obtained in the step (2) to obtain a magnesium alloy liquid;

[0042] (4) leaving the magnesium alloy liquid obtained in the step (3) to stand, then refining and removing slag to obtain pure magnesium alloy liquid;

[0043] (5) Die casting the magnesium alloy liquid obtained in the step (4) to obtain a rare earth magnesium alloy.

[0044]In the present invention, metal Mg and other alloy raw materials are preheated. The present invention has no special limitation on the preheating operation, and the technical scheme of preheating well known to those skilled in the art can be adopted. The present invention is preferably preheate...

Embodiment 1

[0058] (1) Batching: take by weighing metal Mg275kg; Take by weighing Mg-Sm master alloy 100kg by the mass content of 3% and the loss rate of 50%, wherein Sm element accounts for the alloy ratio is 20%; According to the mass content of 0.5% and 50% burning loss rate takes by weighing Mg-Sr master alloy 20kg, wherein the Sr element accounts for 20% of the alloy ratio; according to 0.5% mass content and 10% burning loss rate, take by weighing metal Zn5.5kg, wherein the Zn purity is 98%;

[0059] (2) Preheating: preheat the above materials to 300°C in an oven;

[0060] (3) Melting: Put the preheated metal Mg into a crucible preheated at 400°C, and raise the temperature inside the crucible to 720°C under the protection of nitrogen and sulfur hexafluoride mixed gas, N 2 The flow rate is 1.5L / min, SF 6 The flow rate is 0.27L / min, the metal Mg is melted;

[0061] (4) Alloying: Control the temperature of the magnesium liquid at 660°C, add the preheated Mg-Sm intermediate alloy, Mg-...

Embodiment 2

[0067] (1) batching: take by weighing metal Mg360kg; Take by weighing Mg-Sm master alloy 126kg by the mass content of 3% and 50% burning loss rate, wherein Sm element accounts for alloy proportion and be 20%; According to the mass content of 0.5% and 50% burning loss rate weighs 25.6 kg of Mg-Sr master alloy, wherein Sr element accounts for 20% of the alloy; weighs metal Zn 5.1 kg according to 1.0% mass content and 10% burning loss rate, wherein Zn purity 98%; 20 kg of Mg-Zr master alloy is weighed according to a mass content of 0.2% and a burning loss rate of 75%, wherein the Zr element accounts for an alloy ratio of 25%;

[0068] (2) Preheating: preheat the above materials to 300°C in an oven;

[0069] (3) Melting: Put the preheated metal Mg into a crucible preheated at 400°C, and raise the temperature inside the crucible to 715°C under the protection of nitrogen and sulfur hexafluoride mixed gas, N 2 The flow rate is 1.5L / min, SF 6 The flow rate is 0.27L / min, the metal Mg...

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Abstract

The invention provides rare earth-magnesium alloy and a preparation method thereof. The rare earth-magnesium alloy comprises 1%-5% of RE, 0-1% of Sr, 0.2%-2% of Zn, 0-1% of Zr and the balance Mg, and RE is one or more of Sm, La, Ce and Y. High heat conductivity, strength and high temperature strength are achieved. Raw materials are preheated after being compounded, then the raw materials are alloyed and microalloyed after being smelted, component analysis and fracture testing are carried out after refining impurity removing, and die-cast formation is achieved after qualification is achieved. The preparation method is easy and convenient to operate, and the prepared rare earth-magnesium alloy is high in purity degree, and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a rare earth magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest structural material in engineering, magnesium alloy has good machinability, dimensional stability, electromagnetic shielding and shock resistance, and is widely used in aerospace, marine engineering, base construction, transportation, medical equipment, and automobile manufacturing And 3C industry and other fields, known as "21st century green engineering materials". Practical applications show that when the working temperature exceeds 120 °C, the magnesium alloy grain boundary slips and causes creep, and its mechanical properties decrease sharply. Furthermore, the thermal conductivity of magnesium alloy is small, only 72w / m·k, and the above defects are serious. The industrial application of this alloy is restricted. [0003] Rare earths are called "industrial vi...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C23/04C22C1/02C22C1/03
CPCC22C23/06C22C1/02C22C1/03C22C23/04
Inventor 李远发张亚琴席亚娟高海亮刘德茂刘海平黃春生宋卓能黄维中
Owner KA SHUI TECH HUIZHOU CO LTD
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