CN1670230A

CN1670230A - Magnesium alloy

Info

Publication number: CN1670230A
Application number: CN 200410010133
Authority: CN
Inventors: 史军梅
Original assignee: JIAOZUO YELLOW RIVER MG ALLOY PRODUCT CO Ltd
Current assignee: JIAOZUO YELLOW RIVER MG ALLOY PRODUCT CO Ltd
Priority date: 2004-03-16
Filing date: 2004-03-16
Publication date: 2005-09-21

Abstract

The invention relates to a magnesium alloy which comprises (by weight ratio) Al 0.5-1.5%, Mn 0.15-0.5%, Zn 0.15-0.55%, Si <=0.01%, Cu <=0.005%, Ni <=0.005%, Fe <=0.005%, and balancing magnesium. The mechanical property of the magnesium alloy includes, tensile strength 234 MPa, yield strength 135 MPa, percentage of elongation 11%, because the percentage of elongation is increased substantially, requirement for direct formation of large scale portable computer outer casings can be met.

Description

A kind of novel magnesium alloy

Technical field

The present invention relates to a kind of novel magnesium alloy of good extending performance.

Technical background

Because magnesium alloy has light weight, advantage such as corrosion-resistant, its purposes more and more widely, the shell of laptop computer also uses this material more and more.But, be the comparison difficulty with the large-sized portable computer external of magnesium alloy straight forming because the welding property of magnesium alloy is poor.In the existing trade mark chemical ingredients of the higher magnesium alloy AZ31B of unit elongation be (weight percent): Al:2.8%-3.5%, Mn 〉=0.2%, Zn:0.6%-1.4%, Si≤0.1%, Cu≤0.05%, Ni≤0.005%, Fe≤0.005%, other: magnesium surplus 0.30%.The mechanical property of AZ31B magnesium alloy is: tensile strength 221MPa, and yield strength 110MPa, unit elongation 8% can not satisfy the requirement of straight forming large size portable computer external.

Summary of the invention

The object of the present invention is to provide a kind of novel magnesium alloy of good extending performance, can satisfy the requirement of straight forming large size portable computer external.

For achieving the above object, the present invention adopts following technical scheme: a kind of novel magnesium alloy, its chemical ingredients are (weight percent): Al:0.5%-1.5%, Mn:0.15%-0.5%, Zn:0.15%-0.55%, Si: Cu≤0.01%: Ni≤0.005%: Fe≤0.005%: magnesium surplus≤0.005%.

The novel magnesium alloy that adopts such scheme to make, its mechanical property is: tensile strength 234MPa, yield strength 135MPa, unit elongation 11% because unit elongation has obtained bigger raising, can satisfy the requirement of straight forming large size portable computer external fully.

Embodiment

Embodiment 1: crucible is cleaned with flux, and furnace bottom spreads flux No. 2.After 100 kilograms of magnesium ingots, 0.6 kilogram of aluminium ingot, 10 kilograms of manganiferous master alloys, 0.2 kilogram of preheating of zinc ingot metal, add in the crucible, heat and spread insulating covering agent, stirred after the fusing 30 minutes, put out a fire rotten back removal of contamination then with alterant, and with No. 2 flux; Add refining agent again, refining 15 minutes; At the upper, middle and lower of crucible portion sample examination, chemically examine and come out of the stove after qualified; With continuous metal cast process magnesium alloy is cast into bar, handles with fire-fighting medium in the casting cycle.Casting is carried out mechanical workout, sign to magnesium alloy rod after finishing, and puts in storage after quality inspection.In the magnesium alloy that makes like this, each chemical ingredients is (weight percent): Al 0.5%, and Mn 0.2%, Zn0.2%, Si≤0.01%, Cu≤0.005%, Ni≤0.005%, Fe≤0.005%.

In the above-mentioned raw material, the main component of manganiferous master alloy is manganese and magnesium, and manganiferous ratio is 2%.

Because in the process of removal of contamination, having part material is eliminated, the yield rate of making magnesium alloy is about 94% to 95%, therefore sample examination after refining, certain composition might occur and not meet the situation that alloying constituent requires, at this moment just should be according to prescription, some raw material of corresponding adding carries out melting once more, till the qualified back of chemical examination.

Embodiment 2: with 500 kilograms of magnesium ingots, 5 kilograms of aluminium ingots, 15 kilograms of manganiferous master alloys, 1.5 kilograms of zinc ingot metals, wherein manganiferous ratio is 10% in the master alloy, each chemical ingredients is (weight percent): Al 1.0% in the magnesium alloy that produces, Mn 0.3%, and Zn 0.3%, Si≤0.01%, Cu≤0.005%, Ni≤0.005%, Fe≤0.005%, its manufacturing process is identical with embodiment 1.

Embodiment 3: with 800 kilograms of magnesium ingots, 13 kilograms of aluminium ingots, 40 kilograms of manganiferous master alloys, 4 kilograms of zinc ingot metals, wherein manganiferous ratio is 10% in the master alloy, each chemical ingredients is (weight percent): Al 1.5% in the magnesium alloy that produces, Mn 0.5%, and Zn 0.5%, Si≤0.01%, Cu≤0.005%, Ni≤0.005%, Fe≤0.005%, its manufacturing process is identical with embodiment 1.

Claims

1, a kind of novel magnesium alloy is characterized in that, its chemical ingredients is (weight percent):

Al:0.5%-1.5%, Mn:0.15%-0.5%, Zn:0.15%-0.55%, Si: Cu≤0.01%: Ni≤0.005%: Fe≤0.005%: magnesium surplus≤0.005%.