CN103643097A

CN103643097A - Rare earth and magnesium alloy

Info

Publication number: CN103643097A
Application number: CN201310599513.4A
Authority: CN
Inventors: 简玉君
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-25
Filing date: 2013-11-25
Publication date: 2014-03-19

Abstract

The invention provides a rare earth and magnesium alloy. The rare earth and magnesium alloy is composed of the following raw materials in percentage by weight: 98 to 99% of AZ91D magnesium alloy, 0.5 to 1.2% of yttrium, and 0.5 to 0.8% of cerium. A little amount of yttrium element and cerium element is added, so the corrosion speed of magnesium alloy is prominently reduced, and the mechanical property of magnesium alloy is improved.

Description

A kind of magnesium-rare earth

Technical field

The present invention relates to metal material processing technical field, relate in particular to a kind of magnesium-rare earth.

Background technology

Magnesium alloy is to take magnesium to add other elementary composition alloys as base, it is material the lightest in Structural Engineering, there is the good characteristic that proportion is little, rigidity is high, good, the anti-electromagnetic interference of vibration damping is good, thermal diffusivity is good, texture is good, be widely used in the every field such as aerospace, transportation, chemical industry, rocket.

But the shortcoming of magnesium alloy is also very obvious, more than 120 ℃, its hot strength and creep strength all can decline to a great extent conventionally, have seriously limited the range of application of magnesium alloy.In addition the poor corrosion resistance of magnesium alloy has also restricted its widespread use greatly.And rare earth element has numerous excellent effect such as the melt of purification, rotten tissue, crystal grain thinning in cast magnesium alloys, can significantly improve the mechanical behavior under high temperature of magnesium alloy, simultaneously, as rare earth elements such as Y, can also greatly improve the solidity to corrosion performance of magnesium alloy, therefore the research for magnesium-rare earth obtains increasingly extensive concern and attention.

Summary of the invention

Object of the present invention is to provide a kind of rare earth magnesium with excellent mechanical property and corrosion resistance nature to close

Gold.

The technical solution adopted in the present invention is: a kind of magnesium-rare earth, and the raw material of magnesium-rare earth and weight percent are:

AZ91D magnesium alloy 98-99%;

Yttrium 0.5-1.2%;

Cerium 0.5-0.8%.

Preferably, in AZ91D magnesium alloy, each composition weight percent is: aluminium 8.5-9.5%, zinc 0.45-0.9%, manganese 0.17-0.4%, silicon 0.01-0.05%, copper 0.015-0.025%, nickel 0-0.001%, iron 0.001-0.004%, surplus is magnesium.

Preferably, the weight percent of yttrium is the 0.5-1% of magnesium-rare earth total amount.

Preferably, the weight percent of cerium is the 0.5-0.7% of magnesium-rare earth total amount.

Advantage of the present invention is to have added a small amount of yttrium and Ce elements, has significantly reduced the corrosion speed of magnesium alloy, has improved the mechanical property of magnesium alloy.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.

Embodiment 1

A magnesium-rare earth, the raw material of magnesium-rare earth and weight percent are:

AZ91D magnesium alloy 98%; Yttrium 1.2%; Cerium 0.8%; In AZ91D magnesium alloy, each composition weight percent is: aluminium 8.5%, zinc 0.45%, manganese 0.17%, silicon 0.01%, copper 0.015%, nickel 0%, iron 0.001%, surplus is magnesium.

Embodiment 2

AZ91D magnesium alloy 99%; Yttrium 0.5%; Cerium 0.5%; In AZ91D magnesium alloy, each composition weight percent is: aluminium 9.5%, zinc 0.9%, manganese 0.4%, silicon 0.05%, copper 0.025%, nickel 0.001%, iron 0.004%, surplus is magnesium.

Embodiment 3

AZ91D magnesium alloy 98.5%; Yttrium 1%; Cerium 0.5%; In AZ91D magnesium alloy, each composition weight percent is: aluminium 9.2%, zinc 0.5%, manganese 0.35%, silicon 0.04%, copper 0.02%, nickel 0.001%, iron 0.002%, surplus is magnesium.

The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, not departing under the prerequisite of the technology of the present invention principle, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.

Claims

1. a magnesium-rare earth, is characterized in that, the raw material of described magnesium-rare earth and weight percent are:

AZ91D magnesium alloy 98-99%;

Yttrium 0.5-1.2%;

Cerium 0.5-0.8%.

2. according to a kind of magnesium-rare earth described in claim 1, it is characterized in that: in described AZ91D magnesium alloy, each composition weight percent is: aluminium 8.5-9.5%, zinc 0.45-0.9%, manganese 0.17-0.4%, silicon 0.01-0.05%, copper 0.015-0.025%, nickel 0-0.001%, iron 0.001-0.004%, surplus is magnesium.

3. according to a kind of magnesium-rare earth described in claim 1, it is characterized in that: the weight percent of described yttrium is the 0.5-1% of magnesium-rare earth total amount.

4. according to a kind of magnesium-rare earth described in claim 1, it is characterized in that: the weight percent of described cerium is the 0.5-0.7% of magnesium-rare earth total amount.