CN104313410A

CN104313410A - Aluminum alloy resistant to wear under high-temperature condition

Info

Publication number: CN104313410A
Application number: CN201410591257.9A
Authority: CN
Inventors: 郭芙
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-29
Filing date: 2014-10-29
Publication date: 2015-01-28

Abstract

The invention relates to aluminum alloy resistant to wear under a high-temperature condition. The aluminum alloy is prepared from ingredients in percentage by weight: 10.2-10.5% of silicon, 2.3-2.4% of copper, 0.8-1.0% of magnesium, 3.1-3.3% of nickel, 0.12-0.15% of titanium, 0.15-0.18% of tungsten, 0.3-0.5% of zinc, 0.03-0.05% of boron, 0.1-0.2% of vanadium, 0.01-0.03% of tellurium, 0.03-0.05% of strontium, 0.01-0.05% of bismuth, 0.03-0.05% of stannum, 0.01-0.015% of zirconium and the balance of aluminum. According to the technical scheme, the tungsten and zirconium elements are added, so that the high temperature resistance of the alloy is improved, meanwhile, crystal grains inside a structure can be refined, and the surface smoothness can be improved; and due to the addition of the boron and zirconium elements, the wear resistance of the aluminum alloy under the high-temperature condition can be improved.

Description

Aluminium alloy wear-resisting under a kind of high-temperature condition

Technical field

The invention belongs to Al-alloy material field, aluminium alloy wear-resisting under referring to a kind of high-temperature condition especially.

Background technology

The material that present engine piston uses is cast aluminium alloy, and this kind of cast aluminium alloy has in high temperature resistant, high pressure, high friction environment.And the over-all propertieies such as the Testing Tensile Strength at Elevated Temperature of the aluminum alloy materials now used, thermal conductivity, hardness have certain defect, the existing requirement to the superpower of engine, high rotating speed, low oil consumption can not be adapted to.

Existing technology discloses the technical scheme of a kind of cast aluminium alloy and preparation method thereof, in this technical scheme, use and comprise by weight percentage, the vanadium of the magnesium of the silicon of 11-13%, the copper of 2-4%, 0.5-1.2%, the nickel of 2-3.5%, the titanium of 0.08-0.18% and 0.1-0.2%, all the other are the material composition of aluminium.This technical scheme is improved the intensity of aluminium alloy, but in this technical scheme, aluminium alloy organization internal in high melt process can produce the bar-shaped of silicon-aluminium or columnar grain, and size of microcrystal is larger, the frictional coefficient of aluminum alloy surface is caused to strengthen thus, concerning having a certain impact the resistance to air loss between piston and cylinder sleeve and work-ing life of cylinder sleeve can being had influence on.

For above-mentioned deficiency, the material of contriver to engine piston improves, to overcome the deficiency of above-mentioned technology.

Summary of the invention

Aluminium alloy wear-resisting under the object of this invention is to provide a kind of high-temperature condition, pass through the technical program, the overgrowth of silicon-aluminium bar shape or columnar grain in aluminum alloy organization can be overcome, improve the even of aluminum alloy organization, improve aluminum alloy surface slickness, reduce frictional coefficient, extend the work-ing life of piston and cylinder sleeve.

The present invention is achieved by the following technical solutions:

Aluminium alloy wear-resisting under a kind of high-temperature condition, its composition is by weight percentage, the titanium of the magnesium of the silicon of 10.2-10.5%, the copper of 2.3-2.4%, 0.8-1.0%, the nickel of 3.1-3.3%, 0.12-0.15%, the tungsten of 0.15-0.18%, the boron of 0.03-0.05%, the zinc of 0.3-0.5%, the vanadium of 0.1-0.2%, the tellurium of 0.01-0.03%, the strontium of 0.03-0.05%, the bismuth of 0.01-0.05%, the tin of 0.03-0.05%, the zirconium of 0.01-0.015%, surplus is aluminium.

Described titanium, tungsten, vanadium, zirconium add in the mode of titanium aluminum alloy, partinium, vananum and zirconium alloy respectively.

The present invention's beneficial effect is compared with the existing technology:

By adding tungsten and zr element in the technical program, can the crystal grain of thinning microstructure inside while putting forward heavy alloyed resistance to elevated temperatures, improve surface flatness, and jointly improve wear resistance in the case of a high temperature by adding boron with zr element.

By the temperature design before casting, make the crystal grain grown, suppress because of the reduction of temperature, like this, what just make the crystal grain of a part to grow is too fast, and causes the phenomenon of excessive grain growth, and the performance of aluminium alloy is increased significantly.

Embodiment

Describe concrete technical scheme of the present invention by the following examples in detail, should be understood that, following embodiment only can be used for explaining the present invention and can not being interpreted as being limitation of the present invention.

Aluminium alloy wear-resisting under a kind of high-temperature condition, its composition is by weight percentage, the magnesium of the silicon of 10.2-10.5%, the copper of 2.3-2.4%, 0.8-1.0%, the nickel of 3.1-3.3%, the zinc of 0.3-0.5%, the boron of the titanium of 0.12-0.15%, the tungsten of 0.15-0.18%, 0.03-0.05%, the vanadium of 0.1-0.2%, the tellurium of 0.01-0.03%, the strontium of 0.03-0.05%, the bismuth of 0.01-0.05%, the tin of 0.03-0.05%, the zirconium of 0.01-0.015%, surplus is aluminium.

Aluminum alloy Preparation Method wear-resisting under high-temperature condition is,

Batching;

Melting, first puts into heat fused in smelting furnace by the copper through calculating, nickel and partinium; Add aluminium ingot, after aluminium ingot all melting, adding the silicon grain through calculating, heating to 850-900 DEG C and being incubated 1-2 hour; Add all the other materials, after having confirmed all fusings, carry out refining treatment; After the aluminum alloy melt obtained is incubated 20-30 minute at 850-870 DEG C, with at least 30 DEG C/min of 150-200 DEG C that at the uniform velocity lower the temperature, then is warming up to 850-870 DEG C, breeds after 30-60 minute and carry out constant temperature casting;

Cooling, point two stage coolings after casting, first stage carries out fast cooling to 110-130 DEG C after being cooled to 400-450 DEG C with 25-30 DEG C/min, forms piston blank;

Quench treatment, is incubated 1-2 hour after piston blank being heated to 550-650 DEG C, and carry out the quenching of water liquid, quenching velocity is not less than 2 DEG C/sec, is conducive to the crystal grain distribution of stabilizing tissue inside.

Described batching is, be by weight percentage, the magnesium of the silicon of 10.2-10.5%, the copper of 2.3-2.4%, 0.8-1.0%, the nickel of 3.1-3.3%, the zinc of 0.3-0.5%, the boron of the titanium of 0.12-0.15%, the tungsten of 0.15-0.18%, 0.03-0.05%, the vanadium of 0.1-0.2%, the tellurium of 0.01-0.03%, the strontium of 0.03-0.05%, the bismuth of 0.01-0.05%, the tin of 0.03-0.05%, the zirconium of 0.01-0.015%, surplus is aluminium.

In the following embodiment of the application, be only prepare burden to distinguish to some extent, and other side is all identical, therefore, no longer carries out repeat specification.

Embodiment 1

Aluminium alloy wear-resisting under a kind of high-temperature condition, be by weight percentage, the silicon of 10.2%, the copper of 2.3%, 0.8% magnesium, the nickel of 3.1%, the zinc of 0.3%, the titanium of 0.12%, the tungsten of 0.15%, 0.03% boron, the vanadium of 0.1%, the tellurium of 0.01%, the strontium of 0.03%, the bismuth of 0.01%, the tin of 0.03%, the zirconium of 0.01%, surplus is aluminium.

Embodiment 2

Aluminium alloy wear-resisting under a kind of high-temperature condition, be by weight percentage, the silicon of 10.5%, the copper of 2.4%, 1.0% magnesium, the nickel of 3.3%, the zinc of 0.5%, the titanium of 0.15%, the tungsten of 0.18%, 0.05% boron, the vanadium of 0.2%, the tellurium of 0.03%, the strontium of 0.05%, the bismuth of 0.05%, the tin of 0.05%, the zirconium of 0.015%, surplus is aluminium.

Embodiment 3

Aluminium alloy wear-resisting under a kind of high-temperature condition, be by weight percentage, the silicon of 10.3%, the copper of 2.35%, 0.88% magnesium, the nickel of 3.2%, the zinc of 0.35%, the titanium of 0.13%, the tungsten of 0.17%, 0.035% boron, the vanadium of 0.15%, the tellurium of 0.02%, the strontium of 0.04%, the bismuth of 0.03%, the tin of 0.035%, the zirconium of 0.013%, surplus is aluminium.

Claims

1. aluminium alloy wear-resisting under a high-temperature condition, it is characterized in that: its composition is by weight percentage, the titanium of the magnesium of the silicon of 10.2-10.5%, the copper of 2.3-2.4%, 0.8-1.0%, the nickel of 3.1-3.3%, 0.12-0.15%, the tungsten of 0.15-0.18%, the boron of 0.03-0.05%, the zinc of 0.3-0.5%, the vanadium of 0.1-0.2%, the tellurium of 0.01-0.03%, the strontium of 0.03-0.05%, the bismuth of 0.01-0.05%, the tin of 0.03-0.05%, the zirconium of 0.01-0.015%, surplus is aluminium.

2. aluminium alloy wear-resisting under high-temperature condition according to claim 1, is characterized in that: described titanium, tungsten, vanadium, zirconium add in the mode of titanium aluminum alloy, partinium, vananum and zirconium alloy respectively.