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A kind of gadolinium-rich magnesium alloy and preparation method thereof

A technology of magnesium alloy and gadolinium-rich magnesium, which is applied in the field of gadolinium-rich magnesium alloy and its preparation, can solve the problems of high temperature creep resistance being difficult to meet requirements, and achieves the effects of improving diffusion activation energy, good plasticity and reducing atomic diffusion rate.

Active Publication Date: 2019-12-27
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the heat-resistant magnesium alloy has good tensile mechanical properties, its high-temperature creep resistance performance is still difficult to meet the demand.

Method used

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  • A kind of gadolinium-rich magnesium alloy and preparation method thereof

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Embodiment 1

[0028] The gadolinium-rich magnesium alloy of this embodiment is composed of the following components in mass percentage: Gd 9%, Y 5%, Sm 2%, Al0.4%, the rest are Mg and unavoidable impurities, and the content of impurities is not more than 0.03%.

[0029] The preparation method of the gadolinium-rich magnesium alloy of the present embodiment comprises the following steps:

[0030] 1) remove the scale of magnesium, aluminum, magnesium yttrium master alloy, magnesium gadolinium master alloy and magnesium samarium master alloy, then dry and set aside;

[0031] 2) Take the magnesium, magnesium-gadolinium master alloy, magnesium-yttrium master alloy and magnesium-samarium master alloy that have been processed through step 1) and put them into the crucible successively, then transfer to the electromagnetic induction furnace, 2 and SF 6 Smelting under the protection of a mixed protective gas to obtain an alloy melt of magnesium, gadolinium, yttrium, and samarium;

[0032] 3) Then...

Embodiment 2

[0037]The gadolinium-rich magnesium alloy of this embodiment is composed of the following components in mass percentage: Gd 11%, Y 2.5%, Sm3%, Al0.8%, the rest are Mg and unavoidable impurities, and the content of impurities is not more than 0.03% .

[0038] The preparation method of the present embodiment gadolinium-rich magnesium alloy comprises the following steps:

[0039] 1) remove the scale of magnesium, aluminum, magnesium yttrium master alloy, magnesium gadolinium master alloy and magnesium samarium master alloy, then dry and set aside;

[0040] 2) Take the magnesium, magnesium-gadolinium master alloy, magnesium-yttrium master alloy and magnesium-samarium master alloy that have been processed through step 1) and put them into the crucible successively, then transfer to the electromagnetic induction furnace, 2 and SF 6 Smelting under the protection of a mixed protective gas to obtain an alloy melt of magnesium, gadolinium, yttrium, and samarium;

[0041] 3) Then heat...

Embodiment 3

[0046] The gadolinium-rich magnesium alloy of this embodiment is composed of the following components by mass percentage: Gd 13%, Y 1%, Sm 1%, Al 1%, the rest is Mg and unavoidable impurities, and the content of impurities is not more than 0.03% .

[0047] The preparation method of the present embodiment gadolinium-rich magnesium alloy comprises the following steps:

[0048] 1) remove the scale of magnesium, aluminum, magnesium yttrium master alloy, magnesium gadolinium master alloy and magnesium samarium master alloy, then dry and set aside;

[0049] 2) Get formula quantity and put into crucible successively through step 1) processed magnesium, magnesium-gadolinium master alloy, magnesium-yttrium master alloy and magnesium-samarium master alloy, then transfer to electromagnetic induction furnace, in CO 2 and SF 6 Smelting under the protection of a mixed protective gas to obtain an alloy melt of magnesium, gadolinium, yttrium, and samarium;

[0050] 3) Then heat up the allo...

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Abstract

The invention relates to a gadolinium-rich magnesium alloy and a preparation method thereof and belongs to the technical field of magnesium-based alloys and heat treatment technologies thereof. The gadolinium-rich magnesium alloy is composed of the components of, by mass, 9-13% of gadolinium, 1-5% of yttrium, 1-3% of samarium, 0.4-1% of aluminum and the balance magnesium and inevitable impurities.According to the gadolinium-rich magnesium alloy, mixing adding of multi-component elements is adopted, and the effect of composite strengthening can be achieved, the effects of solid solution strengthening, dispersion strengthening and fine-grain strengthening of the added elements are brought into full play; and the excellent creep-resistant property is achieved, under 200 DEG C / 150 MPa, the creep dependent variable of 100 h can be decreased to 0.051%, the steady state creep rate can be decreased to 1.06x10<-10>s<-1>, under 250 DEG C / 150 MPa, the creep dependent variable of 100 h can be decreased to 0.33%, and the steady state creep rate can be decreased to 2.19x10<-9>s<-1>.

Description

technical field [0001] The invention relates to a gadolinium-rich magnesium alloy and a preparation method thereof, and belongs to the technical field of magnesium-based alloys and heat treatment processes thereof. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in engineering applications. It has the advantages of low density, excellent damping and shock absorption performance, high specific stiffness and specific strength, good electromagnetic shielding performance and easy recycling. Therefore, magnesium alloys have broad application prospects in aerospace, national defense, automobiles, electronic products and other fields. However, under normal circumstances, the strength and creep resistance of ordinary cast magnesium alloys will drop sharply with the increase of service environment temperature, which limits the development of magnesium alloys, making the actual application of magnesium alloys much smaller than that of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22F1/06
CPCC22C23/06C22F1/002C22F1/06
Inventor 李全安陈晓亚陈君王颂博张帅关海昆朱利敏张清
Owner HENAN UNIV OF SCI & TECH
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