KR20110038357A

KR20110038357A - Conposition of aluminum alloy

Info

Publication number: KR20110038357A
Application number: KR1020090095615A
Authority: KR
Inventors: 홍종규
Original assignee: 홍종규
Priority date: 2009-10-08
Filing date: 2009-10-08
Publication date: 2011-04-14

Abstract

PURPOSE: An aluminum alloy composition is provided to ensure uniform color and excellent abrasion resistance when manufactured into a cast product because an oxide film through anodizing is formed well on the cast product. CONSTITUTION: An aluminum alloy composition comprises manganese of 1.2~1.6 weight%, iron 0.08~0.18 weight%, and titanium of 0.03~0.1 weight. The aluminum alloy composition includes 0.03~02 weight% of impurities consisting of silicon, copper, magnesium, nickel, zinc, chrome, lead, or tin.

Description

Aluminum alloy composition {CONPOSITION OF ALUMINUM ALLOY}

The present invention relates to an aluminum alloy composition, and more particularly to an aluminum alloy composition excellent in coloring power and wear resistance.

Generally, aluminum alloys include 1000 series aluminum (99.0% or more), 2000 series aluminum Al-Cu, 3000 series aluminum Al-Mn, 4000 series aluminum Al-Si, 5000 series aluminum Al-Mg, 6000 series aluminum Al-Mg-Si-based, 7000 series aluminum Al-Zn-based, etc. The aluminum alloy is classified into heat-treated alloys (Al-Cu-based, Al-Mg-Si-based, Al-Zn-based), and specific heat It can be divided into a treatment type alloy (pure aluminum type, Al-Mn type, Al-Si type, Al-Mg type). Such aluminum alloys have excellent thermal conductivity and have been widely used in heat exchangers, engine parts, and the like, and are widely used as components of cases and door handles for construction.

On the other hand, the aluminum alloy is surface treated through anodizing, glossing, coloring, general coating, and powder coating called anodizing. Anodizing on aluminum alloys used for the anodizing is anodized aluminum alloy. Electrolysis at the surface to form an oxide film on the surface. At this time, the anodic oxidation of the aluminum alloy is various treatment liquid composition and concentration, additives. Temperature, voltage of the processing liquid. The characteristics of the film can be produced differently according to the current, and the characteristics obtained through such anodizing are excellent in corrosion resistance due to the film, and for decorative appearance improvement, excellent wear resistance, improvement of coating adhesion, improvement of bonding performance, and improvement of lubricity. , Color for decoration purposes, plating pretreatment, surface damage detection and so on.

Thus, a typical example of a method of manufacturing an aluminum alloy that performs conventional anodizing is a preparatory process for preparing a mold and a manufacturing facility, and melting to melt a material composed of aluminum (Al), cobalt (Co), and manganese (Mn). A process, a die casting process using the melted melt, a cooling process for cooling the casting, and a surface treatment process for oxidizing the surface of the cooled casting through anodizing or the like.

At this time, in the above dissolution process, a mixture of aluminum (Al), cobalt (Co) and manganese (Mn) is dissolved at 750 ° C., but the mixing ratio is 98% by weight of aluminum (Al) in cobalt. (Co) and manganese (Mn) are each mixed by 1% by weight to apply an aluminum alloy.

However, the aluminum alloy applied to the above-described manufacturing method is not able to obtain a desired color in the surface treatment process performed through anodizing, so that a high incidence of defects is caused, and a problem that wear occurs along with a problem that the color formed on the surface is deformed when used for a long period of time. have.

Therefore, the present invention was devised to solve the general problems of the existing aluminum alloy,

The problem to be solved by the present invention is to minimize the defect rate in the surface treatment process performed through anodizing by adding manganese, iron and titanium components to aluminum, to prevent deformation of the color in the long-term use as well as to improve the wear resistance It is to provide an aluminum alloy composition that can be.

As a specific means of the present invention for solving the above problems;

In the aluminum alloy composition,

An aluminum alloy composition comprising 1.2 to 1.6% by weight of manganese (Mn), 0.08 to 0.18% by weight of iron (Fe), and 0.03 to 0.1% by weight of titanium (Ti), based on the total weight ratio of the composition.

Preferably, the aluminum alloy composition is any one of silicon (Si), copper (Cu), magnesium (Mg), nickel (Ni), zinc (Zn), chromium (Cr), lead (Pb), tin (Sn) It may include the impurities formed.

More preferably, the impurities may be included in less than 0.03 ~ 0.2 with respect to the total weight ratio of the composition.

As described above, the aluminum alloy composition according to the present invention contains manganese (Mn), iron (Fe), and titanium (Ti), bubbles are generated inside the casting with the effect of improving the fluidity in the die casting process. In addition, the surface condition is good, there is no need for post-processing has the effect of minimizing the defective rate.

In addition, the aluminum alloy composition of the present invention can be obtained by forming an oxide film through the anodizing well on the surface of the casting when it is manufactured as a casting to obtain a uniform color, and obtain excellent wear resistance to minimize the wear of the casting even when using the casting for a long time It can improve durability.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The aluminum alloy composition of the present invention comprises manganese (Mn), iron (Fe), and titanium (Ti) in aluminum, Table 1 is a component table for explaining the aluminum alloy composition of the present invention.

Element Name Si Fe Cu Mg Ni Zn Cr Pb Sn Mn Ti Al
Reference value
(weight%)
0.2
↓

0.08 ~
0.18
0.03 ↓
0.01
↓
0.03 ↓
0.03 ↓
0.03 ↓
0.03 ↓
0.03 ↓
1.2 ~
1.6
0.03-0.1
Balance

The manganese (Mn) is added during the dissolution of the aluminum ingot (INGOT) to perform a function of improving the mechanical properties (strength, hardness) of the aluminum alloy. Such manganese (Mn) is insufficient in mechanical properties (strength and hardness) when the content of the aluminum alloy of the present invention is lower than the lower limit (1.2 wt%), and the content of manganese (Mn) is higher than the upper limit (1.6 wt%). In many cases, when the electrochemical surface treatment is performed, the glossiness of the metal is lost, resulting in deterioration of the decorative property, and the cold workability cannot be sufficiently secured. Accordingly, if the content range of manganese (Mn) added in the present invention is 1.2 to 1.6% by weight, good mechanical properties can be achieved.

The iron (Fe) is contained as an impurity of the aluminum ingot. Such iron (Fe) can promote the cracking of the alloy by increasing the formation of harmful large intermetallic compounds dispersed throughout the alloy, and the content of the iron (Fe) because it sharply lowers the impact strength and strength properties by increasing the brittleness of the alloy It is preferable to regulate (weight%) to the range of 0.08 to 0.18 weight%.

The titanium (Ti) is added during the dissolution of the aluminum ingot. When such titanium is added excessively, the workability and corrosion resistance of the aluminum alloy are lowered, and low moldability is obtained. Therefore, titanium should be maintained in the range of 0.03 to 0.1% by weight based on the total weight ratio of the aluminum alloy composition.

On the other hand, in the aluminum alloy composition of the present invention, as impurities present in the aluminum ingot (SiO), silicon (Si), copper (Cu), magnesium (Mg), nickel (Ni), zinc (Zn), chromium (Cr), lead Impurity consisting of any one of (Pb) and tin (Sn), and such impurities are preferably regulated to 0.03 to 0.2 or less with respect to the total weight ratio of the composition.

When the content of silicon (Si) is low, the strength and casting property deteriorate, and when the content is high, the strength is increased but elongation is reduced, so that the reduction of elongation is minimized and is contained in 0.2 wt% or less for the improvement of strength. It is desirable to regulate as much as possible.

The copper (Cu) is preferably regulated to be contained less than 0.03% by weight since the thermal conductivity is reduced when the content is excessive, hot brittleness occurs during casting, and the high temperature strength is greatly improved when a small amount is added.

Magnesium (Mg) has a high content of oxides in the casting and the formation of oxides in the casting when the content is excessive, the elongation decreases due to the influence of casting quality and heat treatment, the strength is lowered when the content is less than 0.01% by weight to secure strength and elongation It is desirable to regulate to contain.

When the nickel (Ni) is contained in an excessive amount, the strength property of the material is lowered, so that the content of the nickel (Ni) is preferably controlled to contain 0.03% by weight or less.

When the zinc (Zn) is contained in an excessive amount, the thermal conductivity and corrosion resistance are reduced, so it is preferable to regulate the content to be 0.03% by weight or less.

When the chromium (Cr) is contained in an excessive amount, the strength property of the material is lowered, so that the content of the chromium (Cr) is preferably controlled to be contained at 0.03% by weight or less.

When the lead (Pb) is contained in an excessive amount, the strength property of the material is lowered, so that the content is preferably regulated to contain 0.03% by weight or less.

When the tin (Sn) is added in an excessive amount, the strength property of the material is lowered, so it is preferable to restrict the content of the tin (Sn) to 0.03% by weight or less.

Thus, the aluminum alloy composition of the present invention as described above can be produced in an aluminum alloy now by the conventional casting method described below, the present invention is not limited by this description.

The casting process using the composition of the present invention is largely the process of preparing and weighing the aluminum ingot (OTOT), the process of dissolving the aluminum ingot (INGOT), and the molten molten metal is poured into a mold and cast into an aluminum alloy nowadays It includes the process and the process to ship to the product.

In the process of preparing / weighing the aluminum ingot (INGOT), the ingot (INGOT) is applied to the ingot (INGOT) containing 99.7% or more of aluminum.

In the dissolution fixation, ingot is melted in a melting environment of 780 ± 20 ℃ and melting time 2 hours and 30 minutes in a melting furnace to make a molten metal, after which manganese is added and then melted for 30 ± 10 minutes. After adding titanium, dissolve it for 10 ± 10 minutes, process the aggregate DROSS, take a sample and finish the component analysis by the spectrometer, and then remove the hydrogen gas that causes impurities or bubbles in the molten metal. Degassing treatment is carried out.

In the process of casting the aluminum star (cast), the casting temperature is 750 ± 20 ℃, the solidification time is 2 ± 1 minutes casting environment is created.

In the product shipping process, the balance and appearance inspection of the pallet-shaped aluminum beams are performed, and at the same time, the process of re-analyzing the components is performed through the corresponding measuring instrument.

On the other hand, the aluminum huge (地金) shipped as described above is subjected to a casting process for making a variety of aluminum castings, such as engine parts, chassis parts, a typical example is a casting process for manufacturing the door handle of the building as a casting Can be.

Representative processes of manufacturing door handles are to inject molten aluminum molten metal into a cold-pressure chamber die casting machine, and to inject and inhale using a vacuum suction device, and the castings embedded in the mold. And a cooling step for cooling, and a surface treatment step for oxidizing the surface of the cooled casting through anodizing or the like.

Thus, as in the present invention, the aluminum alloy composition for forming an aluminum star includes manganese (Mn), iron (Fe), and titanium (Ti), so that the effect of improving fluidity in the die casting process and At the same time, bubbles are not generated inside the casting, and the surface condition is good, so that a good product without post-processing can be obtained, thereby minimizing the defective rate.

In addition, the Al-Mn-Fe-Ti-based aluminum alloy composition provided by the present invention is formed on the surface of the casting when the casting is formed by anodizing well through anodizing to obtain a uniform color, can be obtained excellent wear resistance casting Even long time use of the casting can minimize the wear and improve the durability.

Claims

In the aluminum alloy composition,

An aluminum alloy composition comprising 1.2 to 1.6% by weight of manganese (Mn), 0.08 to 0.18% by weight of iron (Fe), and 0.03 to 0.1% by weight of titanium (Ti).

The method of claim 1,

The aluminum alloy composition includes impurities made of any one of silicon (Si), copper (Cu), magnesium (Mg), nickel (Ni), zinc (Zn), chromium (Cr), lead (Pb), and tin (Sn). An aluminum alloy composition comprising a.

3. The method of claim 2,

The impurity is an aluminum alloy composition, characterized in that it comprises 0.03 ~ 0.2 or less with respect to the total weight ratio of the composition.