TWI510638B - A method for making aluminum alloy material - Google Patents

Description

Aluminum alloy material manufacturing method

The invention relates to a method for manufacturing an aluminum alloy material, in particular to a method for manufacturing a high-strength aluminum alloy material.

Aluminum alloy has been developed for more than 100 years, and its application range is extremely wide. Its industrial scale is second only to the steel industry. Aluminum alloy materials can be used in aerospace industry and bicycles because of its light weight, proper strength, corrosion resistance and easy surface treatment. Industry, notebook housing, car and daily life such as aluminum foil bags, aluminum doors and windows, etc., gradually replaced the status of steel.

In recent years, under the trend of global lightweight, energy-saving and environmentally-friendly recycling trends, aluminum-magnesium alloys have become the material of choice for the new generation. Among them, Al-Si-Mg (6000 series) alloys in defense, automobiles, home appliances and sports The equipment is widely used, but the less-strength Al-Si-Mg alloy has been the industry's goal of improvement. Therefore, in order to improve the strength of the general commercial Al-Si-Mg alloy, strontium (Sc) element is often added as grain refinement. The agent is added with about 0.03% to 0.20% Sc to refine the grains to increase the tensile strength to about 450 MPa.

The Republic of China Publication No. 200408716, the company's application for "aluminum alloy materials containing antimony elements", and the M6 and M7 aluminum alloys produced by Taiwan Sui High-Tech Co., Ltd. are all described using the 6000 series (Al-Si-Mg) or 7000. Aluminum The alloy (Al-Zn-Mg) is added with a small amount of Sc element to improve the mechanical properties such as strength and hardness of the aluminum alloy.

However, the above-mentioned conventional techniques for expanding the mechanical strength of the aluminum-niobium-magnesium alloy material and expanding the application to the structural member, and adding the rare earth Sc element which is expensive and easily controlled by foreign countries, will cause the production cost of the aluminum-niobium-magnesium alloy. Significantly improved, and when the aluminum-bismuth-magnesium alloy material is added with niobium, the plastic deformation ability in practical use is still poor.

Therefore, there is a great need in the industry to develop a method for manufacturing a high-strength aluminum alloy material, which can greatly improve the tensile strength of the aluminum alloy material, so that the strength and heat dissipation efficiency can be simultaneously combined, and the strength is high. Aluminum alloy material with low density, good heat dissipation and excellent impact resistance.

In view of the above disadvantages of the prior art, the main object of the present invention is to provide a method for producing an aluminum alloy material, which integrates 10 elements, a dissolution treatment, an ingot treatment, and an external pressure treatment to prepare an excellent inclusion. Characteristic aluminum alloy material.

In order to achieve the above object, according to one aspect of the present invention, a method for fabricating an aluminum alloy material is provided, which is characterized by a weight percentage of 94.25% to 98.53% of aluminum, a weight percentage of 0.40% to 0.80%, and a weight percentage of less than 0.50. % of iron, 0.15% to 1.00% by weight of copper, less than 0.60% by weight of manganese, 0.80% to 1.40% by weight of magnesium, less than 0.40% by weight of chromium, less than 0.25% by weight of zinc, and weight Titanium with a percentage of less than 0.20% is used as a substrate, and zirconium with a weight percentage of 0.06% to 0.30% and vanadium of 0.06% to 0.30% by weight are added, and after being melted, an aluminum alloy ingot is cast, and finally processed into aluminum. alloy.

The aluminum alloy material is cast into an aluminum alloy ingot after melting, and the aluminum alloy material is processed and formed to include the following steps: Step 1: using aluminum, bismuth, iron, copper, manganese, magnesium, chromium, zinc and titanium as a base. And adding zirconium and vanadium at the same time, and melting in a high-frequency induction melting furnace or electric resistance furnace to form an aluminum alloy melting soup; Step 2: extruding the aluminum alloy melting soup after degassing and slag removing operation by chill casting The aluminum alloy ingot; and the third step: pressurizing the outer portion of the aluminum alloy ingot, and then processing and forming an aluminum alloy material.

The aluminum alloy ingot in the above step 3 is formed into an aluminum alloy material by extrusion or rolling, or is rolled into a plate-like or sheet-shaped aluminum alloy material by a rolling mill.

In order to achieve the above object, according to another aspect of the present invention, an aluminum alloy material is provided which comprises aluminum in a weight percentage of 94.25% to 98.53%, a weight percentage of 0.40% to 0.80%, and an iron content of less than 0.50% by weight. The weight percentage is 0.15%~1.00% copper, the weight percentage is less than 0.60% manganese, the weight percentage is 0.80%~1.40% magnesium, the weight percentage is less than 0.40% chromium, the weight percentage is less than 0.25% zinc, and the weight percentage is less than 0.20% Titanium, 0.06% to 0.30% by weight of zirconium and 0.06% to 0.30% by weight of vanadium.

The above summary and the following detailed description and drawings are It can further explain the ways, means and effects of this creation to achieve the intended purpose. Other purposes and advantages of this creation will be explained in the following description and drawings.

1‧‧‧Aluminum alloy material

10‧‧‧Substrate

101‧‧‧Aluminium

102‧‧‧矽

103‧‧‧ iron

104‧‧‧ copper

105‧‧‧Mn

106‧‧‧Magnesium

107‧‧‧Chromium

108‧‧‧Zinc

109‧‧‧Titanium

11‧‧‧Aluminium alloy melting soup

111‧‧‧Zirconium

112‧‧‧Vanadium

12‧‧‧Aluminum alloy ingot

A‧‧‧melting step

b‧‧‧Extrusion step

c‧‧‧External pressurization step

The first figure is a flow chart of a method for manufacturing an aluminum alloy material according to the present invention.

The embodiments of the present invention are described by way of specific examples, and those skilled in the art can readily understand the advantages and effects of the present invention from the disclosure of the present disclosure.

The aluminum alloy material of the invention is added with a small amount of alloying elements such as Zr and V in the 6000 series aluminum alloy, is cast into an ingot by chilling, and is made into a single material by extrusion and T6 heat treatment, and the tensile strength of the alloy material can be A substantial increase. The aluminum alloy material not only has excellent plastic deformation ability at room temperature, but also has higher strength than the material without adding a small amount of alloying elements, and can be applied to structural parts and other structural parts of the outer casing of the national defense, aerospace, automobile, home appliance and OA industries.

Please refer to the first figure, which is a flow chart of a method for manufacturing an aluminum alloy material according to the present invention. As shown in the figure, the present invention provides a method for manufacturing an aluminum alloy material, which mainly comprises three steps. Step 1: it is 94.25%-98.53% by weight of aluminum 101, and 0.40%~0.80% by weight of 矽102, Weight percentage less than 0.50% iron 103, weight percentage 0.15%~1.00% copper 104, weight percentage less than 0.60% manganese 105, weight percentage 0.80%~1.40% magnesium 106, weight percentage less than 0.40% chromium 107, weight hundred The zinc 108 having a fraction of less than 0.25% and the titanium 109 having a weight percentage of less than 0.20% are the substrate 110, and adding 0.06% to 0.30% by weight of zirconium 111 and 0.06% to 0.30% by weight of vanadium 112, and having a high frequency The induction melting furnace melts a to form an aluminum alloy melt 11; Step 2: the aluminum alloy melt is degassed and slag-removed to form an aluminum alloy ingot by chill casting; and step 3: the aluminum alloy ingot is further External pressurization (for example, by extrusion or rolling), and then processing various products (for example, extruded into a bar or sheet by an extruder or rolled into a plate or sheet of aluminum alloy by a rolling mill) material).

Example

The preparation method of the embodiment and the comparative example alloy of the invention are all melted by high-frequency Al, Si, Mg, Cu, Mn, and grain refiner raw materials in a high-frequency induction melting furnace under the protection of Ar atmosphere, and are removed. After the gas and slag are removed, the molten cast is cast into a vertical Direct Chill Type continuous casting machine to make an 8" cylindrical Al-Si-Mg-Cu-Mn-X alloy ingot, and then hot extruded. The machine is extruded into a bar with a diameter of 22 mm and a length of 1000 mm at a high temperature of about 40:1 and about 400 ° C. The T6 heat treatment is performed, and the heat treatment process is first quenched after 530 ° C x 1 hr. Further, annealing treatment was carried out at 175 ° C for 8 hrs, and the compositions and mechanical properties of Examples 1 to 7 and Comparative Example 8 are shown in Tables 1 to 3.

Table 1: Sample composition (wt%) of Examples 1 to 7 and Comparative Example 8

The aluminum alloy material of the present invention is based on the 6061 specification of Comparative Example 8, and in the present invention, the seventh embodiment is further supplemented with Sc element by using 6061 as a substrate, and the tensile strength after extrusion is 195 MPa, which is more compact than Comparative Example 8. The tensile strength after the preparation is 152 MPa, and the tensile strength of the sample of Example 7 can be increased to 408 MPa after the heat treatment by T6, which is 28.3% higher than the tensile strength of 318 MPa of the 6061 sample of Comparative Example 8.

In Example 6, the content of Mg, Cu and Mn was further added to 6061 as the substrate, and the tensile strength after extrusion was 164 MPa, which was better than the tensile strength of 152 MPa after extrusion in Comparative Example 8, and then after the heat treatment by T6. The tensile strength of the sample can be increased to 342 MPa, which is 7.5% higher than the tensile strength of 318 MPa of the 6061 sample of Comparative Example 8.

In Example 5, Zr and V elements were further added to 6061 as a substrate, and after extrusion, The tensile strength is 187 MPa, which is better than the tensile strength 152 MPa after extrusion in Comparative Example 8. After the T6 heat treatment, the tensile strength of the sample of Example 5 can be increased to 401 MPa, which is higher than the tensile strength of the 6061 sample of Comparative Example 8. 318MPa increased by 26.1%.

In Examples 2~4, Zr, V, Mg, Cu, and Mn were added to 6061 as the substrate. The tensile strength after extrusion was 205 MPa, 217 MPa, and 192 MPa, respectively, which were better than the tensile strength 152 MPa of Comparative Example 8. After the T6 heat treatment, the tensile strength was increased to 438 MPa, 447 MPa, and 410 MPa, which was 37.7%, 40.6%, and 28.9% higher than the tensile strength 318 MPa of the 6061 sample of Comparative Example 8, respectively. Examples 2 to 4 The reason for the difference in tensile strength is caused by the difference in the amount of Cu and Mn added to the strengthening phase.

In Example 1, the elements of Sc, Zr, Mg, Cu and Mn were added to 6061 as the substrate, and the tensile strength after extrusion was 230 MPa, which was better than the tensile strength of 152 MPa of Comparative Example 8, and the tensile strength after heat treatment by T6. The lift was increased to 450 MPa, which was 41.5% higher than the tensile strength 318 MPa of the 6061 sample of Comparative Example 8. Further, the tensile strength of the sample of Example 3 was similar to 447 MPa.

The above-described embodiments are merely illustrative of the features and functions of the present invention and are not intended to limit the scope of the technical content of the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the creation. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later.

1‧‧‧Aluminum alloy material

10‧‧‧Substrate

101‧‧‧Aluminium

102‧‧‧矽

103‧‧‧ iron

104‧‧‧ copper

105‧‧‧Mn

106‧‧‧Magnesium

107‧‧‧Chromium

108‧‧‧Zinc

109‧‧‧Titanium

11‧‧‧Aluminium alloy melting soup

111‧‧‧Zirconium

112‧‧‧Vanadium

12‧‧‧Aluminum alloy ingot

A‧‧‧melting step

b‧‧‧Extrusion step

c‧‧‧External pressurization step

Claims (6)

The invention relates to a method for preparing an aluminum alloy material, which comprises a weight percentage of 94.25%-98.53% aluminum, a weight percentage of 0.40%~0.80%, a weight percentage less than 0.50% iron, a weight percentage of 0.15%~1.00% copper, and a weight. Manganese with a percentage of less than 0.60%, magnesium with a weight percentage of 0.80% to 1.40%, chromium with a weight percentage of less than 0.40%, zinc with a weight percentage of less than 0.03%, and titanium with a weight percentage of less than 0.20%, and a weight percentage of 0.06% ~0.30% zirconium and 0.06%~0.30% by weight of vanadium, and after melting, cast aluminum alloy ingots, and finally processed into aluminum alloy materials. The method for manufacturing a high-strength aluminum alloy material according to claim 1, wherein the aluminum alloy material comprises the following steps: Step 1: aluminum, bismuth, iron, copper, manganese, magnesium, Chromium, zinc and titanium are used as substrates, and zirconium and vanadium are added at the same time, and melted in a high-frequency induction melting furnace or electric resistance furnace to form an aluminum alloy melting soup; Step 2: after deaeration and slag removal operation of the aluminum alloy melting soup Extrusion into an aluminum alloy ingot by chill casting; and step 3: further pressurizing the outer portion of the aluminum alloy ingot, and then processing and forming an aluminum alloy material. The method for producing a high-strength aluminum alloy material according to the second aspect of the invention, wherein the aluminum alloy ingot in the third step is formed into an aluminum alloy material by extrusion or rolling. The method for manufacturing a high-strength aluminum alloy material according to the second aspect of the invention, wherein the aluminum alloy ingot in the step (3) is extruded into an aluminum alloy material of a bar or a plate by an extrusion machine. The method for producing a high-strength aluminum alloy material according to the second aspect of the invention, wherein the aluminum alloy ingot in the third step is rolled into a plate-shaped or sheet-shaped aluminum alloy material by a rolling mill. An aluminum alloy material comprising 94.25%-98.53% by weight of aluminum, 0.40%~0.80% by weight of bismuth, less than 0.50% by weight of iron, 0.15%~1.00% by weight of copper, and less than 0.60 by weight % manganese, weight percent 0.80% to 1.40% magnesium, weight less than 0.40% chromium, weight less than 0.03% zinc, and weight less than 0.20% titanium, weight percent 0.06% to 0.30% zirconium and weight percent 0.06% to 0.30% vanadium.