CN102296218A

CN102296218A - High-strength heat-resistant magnalium alloy

Info

Publication number: CN102296218A
Application number: CN2011102434425A
Authority: CN
Inventors: 谢利荣
Original assignee: Wujiang Fine Workmanship and Aluminum Word Manufactory
Current assignee: Wujiang Fine Workmanship and Aluminum Word Manufactory
Priority date: 2011-08-24
Filing date: 2011-08-24
Publication date: 2011-12-28

Abstract

A high-strength heat-resistant magnalium alloy. The heat-resistant magnalium alloy comprises: by weight, 4.5 to 5.5% of copper, 0.5 to 1.0% of manganese, 0.1 to 0.5% of titanium, 0.15 to 0.25% of cadmium, 0.05 to 0.35% of vanadium, 0.1 to 0.5% of lithium, 0.1 to 0.5% of boron, 0.1 to 0.3% of iron, 0.05 to 0.15% of silicon, 0.01 to 0.05% of magnesium, 0.01 to 0.05% of zinc, 0.1 to 0.5% of manganese, 0.01 to 0.05% of tin, 0.15 to 0.55% of bismuth and the balance aluminum. The invention provides the high-strength heat-resistant magnalium alloy. A casting made of the high-strength heat-resistant magnalium alloy can be strengthened through heat treatment and after being quenched, the casting has the advantages of high strength, good plasticity and thermal properties, high corrosion resistance, good machinability, good casting properties and good weldability, wherein after long-term use, plasticity is better.

Description

The hot magnalium of high strength anti

Technical field

The present invention relates to a kind of high strength heat resistant magnalium.

Background technology

Aluminium is the practical metallic substance that is only second to iron, industrial being of wide application, because aluminium has characteristics such as in light weight, intensity height, as the purposes of structured material also enlarging, in order to improve the intensity of aluminium alloy, toughness, anticorrosion stress-resistant cracking performance and thermotolerance etc., need to add alloying elements, magnesium can improve the molten admittedly thermal treatment of X alloy and the intensity of the back alloy that quenches, and makes aluminium alloy at room temperature have higher intensity and extension performance, but can reduce tensile strength.

Summary of the invention

In order to overcome the deficiencies in the prior art, technical problem to be solved by this invention provides a kind of high strength heat resistant magnalium.

For solving the problems of the technologies described above, the present invention realizes like this

The high strength heat resistant magnalium comprises the alloying element of following mass percent: the aluminium of copper 4.5-5.5%, manganese 0.5-1.0%, titanium 0.1-0.5%, Cd0.15-0.25%, vanadium 0.05-0.35%, lithium 0.1-0.5%, boron 0.1-0.5%, iron 0.1-0.3%, silicon 0.05-0.15%, magnesium 0.01-0.05%, zinc 0.01-0.05%, manganese 0.1-0.5%, tin 0.01-0.05%, bismuth 0.15-0.55% and surplus.

Copper can improve intensity, the hardness of aluminium alloy, but can reduce extensibility; Iron can increase DIMENTIONAL STABILITY and support performance, makes it at high temperature have high strength, hardness, but excessive iron and copper form the Cu2FeA7 component and reduces the required copper amount of annealing effect; Silicon combines with iron, prevents that iron from combining the tensile property that reduces alloy with copper;

Addition element magnesium can improve the intensity of alloy system in zinciferous aluminium alloy, because of magnesium and zinc formation MgZn.But can reduce the overall corrosion resistance of aluminium, can overcome this shortcoming by adding copper or chromium.

Boron, manganese, bismuth, cadmium can increase the recrystallize humidity of aluminium alloy, improve processibility, opourability and the welding property of aluminium alloy; Titanium, boron can crystal grain thinnings, and the processing of control casting original state is with grain fineness number and shape in the ingot casting; Tin can strengthen artificially aged effect after the aluminium alloy solution heat treatment greatly, makes alloy strength increase, and erosion resistance improves, and the nickel of high level causes the alloy thermal crack, exists simultaneously if any small amount of magnesium, and then the artificially aged feature just obviously weakens.Bismuth can improve the machinability of aluminium alloy.

The alloy that the present invention obtains is for being aluminum magnesium alloy, and foundry goods can heat treatment reinforcement, urge fire after, intensity height, and plasticity, hot well life-time service plasticity is good, the solidity to corrosion height, machinability is good, castability is good, weldability is good.

Embodiment

The present invention is described in further detail below in conjunction with embodiment.

Embodiment 1

The high strength heat resistant magnalium comprises the alloying element of following mass percent: the aluminium of copper 4.5%, manganese 0.5%, titanium 0.1%, Cd0.15%, vanadium 0.05%, lithium 0.1%, boron 0.1%, iron 0.1%, silicon 0.05%, magnesium 0.01%, zinc 0.01%, manganese 0.1%, tin 0.01%, bismuth 0.15% and surplus.Castmethod is sand mold casting (S), permanent mold casting or investment cast.Alloy state is T4, and the aluminium alloy tensile strength that the present invention obtains is 289MPa, and elongation is 3.2%, and Bu Shi intensity is 80HBS.

Embodiment 2

The high strength heat resistant magnalium comprises the alloying element of following mass percent: the aluminium of copper 5.5%, manganese 1.0%, titanium 0.5%, Cd0.25%, vanadium 0.35%, lithium 0.5%, boron 0.5%, iron 0.3%, silicon 0.15%, magnesium 0.05%, zinc 0.05%, manganese 0.5%, tin 0.05%, bismuth 0.55% and surplus.Castmethod is sand mold casting (S), permanent mold casting or investment cast.Alloy state is T4, and the aluminium alloy tensile strength that the present invention obtains is 495MPa, and elongation is 2.8%, and Bu Shi intensity is 75HBS.

Embodiment 3

The high strength heat resistant magnalium comprises the alloying element of following mass percent: the aluminium of copper 4.0%, manganese 0.8%, titanium 0.3%, Cd0.2%, vanadium 0.15%, lithium 0.3%, boron 0.3%, iron 0.2%, silicon 0.8%, magnesium 0.04%, zinc 0.03%, manganese 0.4%, tin 0.02%, bismuth 0.19% and surplus.Castmethod is sand mold casting (S), permanent mold casting or investment cast.Alloy state is T4, and the aluminium alloy tensile strength that the present invention obtains is 312MPa, and elongation is 2.1%, and Bu Shi intensity is 95HBS.

Above-mentioned embodiment does not limit technical scheme of the present invention in any form, and the technical scheme that mode obtained that every employing is equal to replacement or equivalent transformation all drops on protection scope of the present invention.

Claims

1. high strength heat resistant magnalium comprises the alloying element of following mass percent: the aluminium of copper 4.5-5.5%, manganese 0.5-1.0%, titanium 0.1-0.5%, Cd0.15-0.25%, vanadium 0.05-0.35%, lithium 0.1-0.5%, boron 0.1-0.5%, iron 0.1-0.3%, silicon 0.05-0.15%, magnesium 0.01-0.05%, zinc 0.01-0.05%, manganese 0.1-0.5%, tin 0.01-0.05%, bismuth 0.15-0.55% and surplus.