CN105177472A - Reinforced composite aluminum alloy automobile part mixed with alumina fibers and casting technology of reinforced composite aluminum alloy automobile part - Google Patents

Abstract

The invention relates to the technical field of aluminum alloy automobile parts, in particular to a reinforced composite aluminum alloy automobile part mixed with alumina fibers and a casting technology of the reinforced composite aluminum alloy automobile part. According to the part, the alumina fibers with the surfaces coated with ludox are added into conventional aluminum alloy materials through composite materials, and after treatment, the original form of the alumina fibers is kept, the wettability of the alumina fibers and metal melting liquid is better, and the mechanical performance of the aluminum alloy materials is improved more efficiently. The aluminum alloy materials are high in strength, good in wear resistance, stable to heat and good in dimension stability, certain ductility is achieved, processing and molding are facilitated, and the corrosion resisting capacity is high. The part obtained through casting has the beneficial effects of being light and durable, and has high application value.

Description

A kind of blending sapphire whisker enhancement type Al-alloy automobile component and casting technique thereof

Technical field

The present invention relates to aluminium alloy automobile component technical field, be specifically related to a kind of blending sapphire whisker enhancement type Al-alloy automobile component and casting technique thereof.

Background technology

Automobile is made up of tens0000 component, and wherein major part is metallic substance, and the lightweight of automobile component, safe and economized realize the modern basic condition of automobile, is also the only way of improving automobile competitive capacity.Aluminium alloy has that specific tenacity is high, fine corrosion resistance, be easy to be shaped, easier regeneration, have the advantage that the materials such as traditional cast iron, steel are incomparable, therefore, the component manufactured by aluminium alloy are in recent years widely used in the automotive industry gradually.

China has become the fifth-largest automotive industry state in the world, but the average aluminum amount of China's automobile still exists larger difference compared with other developed countries, and performance and the production technique of exploitation further, in-depth aluminium alloy just seem particularly important.

Summary of the invention

The object of the invention is to, provide a kind of blending sapphire whisker enhancement type Al-alloy automobile component and casting technique thereof, to achieve these goals, the technical solution used in the present invention is as follows:

A kind of blending sapphire whisker enhancement type Al-alloy automobile component, it is characterized in that, this aluminum alloy spare part material is made up of the raw material of following weight part: aluminium 85-100, indium 0.01-0.02, titanium 0.4-0.5, passivation of lithium powder 0.4-0.5, zinc 1-2, magnesium 0.6-0.8, niobium 0.01-0.02, iron 2-3, sapphire whisker 4-5, solid content are silicon sol 8-10, impurity≤0.01 of 10-15%.

The casting technique of described a kind of blending sapphire whisker enhancement type Al-alloy automobile component is:

(1) first sapphire whisker is dropped in silicon sol, high-speed stirring makes aluminum oxide dispersed in colloidal sol, subsequently by mixed slurry through warm air drying, completely remove moisture naturally cool to room temperature, again gained powder is heated to 750-800 DEG C subsequently, constant temperature is for subsequent use;

(2) other leftover materials are mixed, drop in resistance furnace, be heated to 750-800 DEG C of melting process, then step (1) gained material is dropped in aluminium alloy, after mechanical stirring 30-40min, add refining agent, after refining treatment terminates, melt cast is shaping, to obtain final product.

Beneficial effect: the present invention with the addition of the sapphire whisker of Surface coating silicon sol in conventional aluminum alloys material, sapphire whisker after processing like this not only maintains its original form, better with the wetting property of molten metal, improve the mechanical property of aluminum alloy materials more efficiently, this aluminum alloy materials intensity is high, wear resistance good, to thermally-stabilised, good stability of the dimension, there is certain ductility, be convenient to machine-shaping, resistance to corrosion is strong, casts the component obtained and has lightweight, durable advantage, have using value.

Embodiment

Embodiment

The aluminum alloy spare part of the present embodiment is made up of the raw material of following weight part: aluminium 95, indium 0.02, titanium 0.4, passivation of lithium powder 0.4, zinc 1.5, magnesium 0.7, niobium 0.01, iron 2.8, sapphire whisker 4.5, solid content are silicon sol 10, impurity≤0.01 of 10%.

Its casting technique is:

(1) first drop in silicon sol by sapphire whisker, high-speed stirring makes aluminum oxide dispersed in colloidal sol, subsequently by mixed slurry through warm air drying, completely remove moisture naturally cool to room temperature, again gained powder is heated to 780 DEG C subsequently, constant temperature is for subsequent use;

(2) other leftover materials are mixed, drop in resistance furnace, be heated to 800 DEG C of melting process, then step (1) gained material is dropped in aluminium alloy, after mechanical stirring 35min, add refining agent, after refining treatment terminates, melt cast is shaping, to obtain final product.

The obtained alloy of the present embodiment is materialsed and is carried out the performance test results and be: tensile strength: 368MPa, unit elongation: 14.8%, hardness: 142HB.This batch of component work-ing life, comparatively conventional aluminum alloyed components on average promoted more than 30%.

Claims (2)

1. blending sapphire whisker enhancement type Al-alloy automobile component, it is characterized in that, this component material is made up of the raw material of following weight part: aluminium 85-100, indium 0.01-0.02, titanium 0.4-0.5, passivation of lithium powder 0.4-0.5, zinc 1-2, magnesium 0.6-0.8, niobium 0.01-0.02, iron 2-3, sapphire whisker 4-5, solid content are silicon sol 8-10, impurity≤0.01 of 10-15%.

2. the casting technique of a kind of blending sapphire whisker enhancement type Al-alloy automobile component as claimed in claim 1, it is characterized in that, described casting technique is:

(1) first sapphire whisker is dropped in silicon sol, high-speed stirring makes aluminum oxide dispersed in colloidal sol, subsequently by mixed slurry through warm air drying, completely remove moisture naturally cool to room temperature, again gained powder is heated to 750-800 DEG C subsequently, constant temperature is for subsequent use;

(2) other leftover materials are mixed, drop in resistance furnace, be heated to 750-800 DEG C of melting process, again step (1) gained material is dropped in aluminium alloy, refining agent is added after mechanical stirring 30-40min, after refining treatment terminates, melt cast is shaping, to obtain final product.