WO2014205607A1

WO2014205607A1 - Method for preparing nanoscale silicon carbide aluminum alloy rod

Info

Publication number: WO2014205607A1
Application number: PCT/CN2013/000792
Authority: WO
Inventors: 孙飞; 赵勇
Original assignee: 苏州金仓合金新材料有限公司
Priority date: 2013-06-26
Filing date: 2013-06-28
Publication date: 2014-12-31
Also published as: CN103305726B; CN103305726A

Abstract

Provided in the present invention is a method for preparing a nanoscale silicon carbide aluminum alloy rod: a nano silicon carbide material is added to an aluminum-based alloy material to acquire a novel nanoscale silicon carbide aluminum material. Also provided in the present invention is the nanoscale silicon carbide aluminum alloy rod prepared on the basis of the method. The nanoscale silicon carbide aluminum alloy rod consists of the following components: nanoscale silicon carbide that accounts for 2-3% of the total weight, magnesium that accounts for 0.4-0.8% of the total weight, zinc that accounts for 0.05-0.3% of the total weight, manganese that accounts for 0.05-0.25% of the total weight, nickel that accounts for 0.05-0.1% of the total weight, iron that accounts for 0.02-0.1% of the total weight, a sum of unavoidable impurities that accounts for ≤ 0.2% of the total weight, and aluminum that makes up the remainder. Also provided in the present invention is a method for preparing a nanoscale silicon carbide aluminum rod. Based on the present invention, obviated is the need for the nanoscale silicon carbide aluminum alloy rod to undergo means of thermal treatment such as quenching and aging to increase mechanical properties before being used for an aluminum welding technology, thus increasing production efficiency, conserving production costs, and completing a weldable novel alloyed aluminum alloy material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preparing a nano-sized silicon carbide aluminum alloy rod and a nano-sized silicon carbide aluminum alloy rod prepared according to the method. BACKGROUND OF THE INVENTION Nano-sized silicon carbide is a nano-material prepared on the basis of ordinary silicon carbide materials through certain technical conditions. Nano-sized silicon carbide has high purity, small particle size, uniform distribution, large specific surface area, high surface activity, low bulk density, excellent mechanical, thermal, electrical and chemical properties, ie high hardness, high wear resistance and Good self-lubrication, high thermal conductivity, low thermal expansion coefficient and high temperature strength.

Aluminum alloy is one of the most widely used non-ferrous metal structural materials in the industry and has been widely used in aviation, aerospace, automotive, machinery manufacturing, marine and chemical industries. With the rapid development of science and technology and industrial economy in recent years, the demand for aluminum alloy welded structural parts is increasing, and the research on the weldability of aluminum alloys is also deepened. The wide application of aluminum alloys has promoted the development of aluminum alloy welding technology. At the same time, the development of welding technology has expanded the application field of aluminum alloys. Therefore, the welding technology of aluminum alloys is becoming one of the research hotspots.

However, in the production process of aluminum alloy, it is necessary to improve the mechanical properties by heat treatment such as quenching and aging, so that it can be applied to the welding of aluminum alloy, if it can provide a heat treatment method which does not need to be quenched and aged to improve its mechanical properties. The aluminum alloy material that can be applied to the aluminum alloy welding technology will greatly improve the production efficiency and further reduce the production cost. Summary of the invention

The object of the present invention is to provide a method for preparing a high-strength lightweight nano-scale silicon carbide aluminum alloy rod, so that the prepared nano-scale silicon carbide aluminum alloy rod not only has the light weight of the existing aluminum alloy material , good plasticity, good corrosion resistance, and no need to improve the mechanical properties through heat treatment such as quenching and aging, can be applied to aluminum alloy welding technology, thereby improving production efficiency and saving production costs. Completed a new alloy aluminum alloy material that can be welded.

In order to achieve the above object, the technical solution adopted by the present invention is as follows:

A method for preparing a nano-scale silicon carbide aluminum alloy rod, comprising the following steps:

1) Weighing 2-3% of the total weight of nano-sized silicon carbide, 0.4-0.8% of the total weight of magnesium, 0.05-0.3% of the total weight of zinc, 0.05-0.25% of the total weight of manganese, The total weight of nickel is 0.05-0.1%, the total weight is 0.02-0.1% of iron, and the total weight is 95.45-97.43% of aluminum;

2) The aluminum ingot is placed in a power frequency smelting holding furnace for melting, the melting temperature is: 730-770 ° C, the melting time is 20-30 minutes, and the temperature is maintained at 550 ° C for 5-10 minutes, Aluminum liquid

3) adding the nano-sized silicon carbide, zinc ingot, iron ingot, manganese ingot and nickel ingot to the surface of the aluminum liquid, and raising the temperature of the power frequency melting and holding furnace to about 750 ° C, turning on the electric furnace The vibrating device mixes the alloy liquid thoroughly for 15-20 minutes;

4) adding a magnesium ingot to the alloy liquid described in the step 3), and then charging the power frequency melting furnace with a total amount of inert gas of 0.01 MPa to 0.02 MPa, and refining for 10-15 minutes;

5) Sampling the refined alloy liquid and analyzing its composition;

6) The refined alloy liquid whose composition is determined to have a chemical composition within a predetermined range is cast into an aluminum alloy cast rod.

7) Stripping the aluminum alloy rod, and then extruding the stripped aluminum alloy rod by an extruder.

8) Detect the extruded alloy rod and pack it into the warehouse.

Further, the nano-sized silicon carbide has a particle diameter of preferably from 700 nm to 900 nm.

Further, step 4) the inert gas is preferably nitrogen.

Further, step 5) analyzing the chemical composition of the refined alloy liquid using a spectrometer. Further, step 6) casting the aluminum alloy cast rod by continuous casting. Further, step 6) The cast aluminum alloy cast rod preferably has a diameter of 10 mm to 150 mm. Further, step 7) The extruder is preferably a 1200 ton single action extruder.

Take a step further, step 5) Use ultrasonic flaw detection.

The nano-sized silicon carbide aluminum alloy rod prepared according to the above preparation method of the nano-sized silicon carbide aluminum alloy rod is composed of the following components: nano-scale silicon carbide accounts for 2-3% of the total weight, and magnesium accounts for 0.4-0.8% of the total weight. Zinc accounts for 0.05-0.3% of the total weight, manganese accounts for 0.05-0.25% of the total weight, nickel accounts for 0.05-0.1% of the total weight, iron accounts for 0.02-0.1% of the total weight, and the total unavoidable impurities account for 0.2% of the total weight. %, the balance is aluminum.

The invention utilizes nano silicon carbide material with high purity, small particle size, uniform distribution, large specific surface area, high surface activity, low bulk density, excellent mechanical, thermal, electrical and chemical properties, and A nano-sized silicon carbide aluminum alloy material is obtained by adding nano silicon carbide material to the basic alloy material. The nano-scale silicon carbide alloy material not only has the characteristics of light weight, good plasticity and good corrosion resistance of the existing aluminum alloy material, but also does not need to improve mechanical properties by heat treatment such as quenching and aging; thereby improving production Efficiency saves production costs and completes new alloy aluminum alloy materials that can be welded.

DRAWINGS

1 is a flow chart of a method for preparing a nano-sized silicon carbide aluminum alloy rod provided by the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in conjunction with the embodiments, but it is not intended to limit the scope of application of the present invention.

Example 1

Preparation method of nano-scale silicon carbide aluminum alloy rod:

Step 1: Weigh 2% of the total weight of nano-sized silicon carbide, 0.4% of the total weight of magnesium, 0.05% of the total weight of zinc, 0.05% of the total weight of manganese, 0.05% of the total weight of nickel , iron containing 0.02% of the total weight, accounting for 97.43% of the total weight of aluminum;

Step 2: The aluminum ingot is placed in a power frequency smelting holding furnace for melting, and the melting temperature is: 730-770 ° C, melting time is 20-30 minutes, and incubated at 550 ° C for 5-10 minutes to obtain aluminum liquid.

Step 3: Add nano-scale silicon carbide, zinc ingot, iron ingot, manganese ingot and nickel ingot to the surface of the above aluminum liquid, and raise the temperature of the power frequency melting and holding furnace to about 750 °C, and turn on the electric furnace vibration device. The alloy liquid is thoroughly mixed for 15-20 minutes.

Step 4: Adding a magnesium ingot to the alloy liquid described in the step 3), and then charging the power frequency melting and holding furnace with an inert gas of a total amount of 0.01 MPa to 0.02 MPa, and refining for 10-15 minutes. .

Step 5: Sampling the refined alloy solution and analyzing its composition.

Step 6: The refined alloy liquid whose composition is determined to have a chemical composition within a predetermined range is cast into an aluminum alloy cast rod.

Step 7: Stripping the above-mentioned aluminum alloy rod, and then extruding the stripped aluminum alloy rod by an extruder.

Step 8: Detect the extruded alloy rod and pack it into the warehouse.

The nano-sized silicon carbide aluminum alloy rod prepared according to the above preparation method of the nano-sized silicon carbide aluminum alloy rod is composed of the following components: nano-scale silicon carbide accounts for 2% of the total weight, magnesium accounts for 0.4% of the total weight, and zinc accounts for total 0.05% by weight, manganese is 0.05% by weight, nickel is 0.05% by weight, iron is 0.02% by weight, unavoidable impurities are 0.2% by weight, and the balance is aluminum. Example 2

The above nanoscale silicon carbide aluminum alloy rod is obtained by the following method:

Step 1: Weigh 3% of the total weight of nano-sized silicon carbide, 0.8% of the total weight of magnesium, 0.3% of the total weight of zinc, 0.25% of the total weight of manganese, 0.1% of the total weight of nickel , the total weight of 0.1% of iron, accounting for 95.45% of the total weight of aluminum, the nano-sized silicon carbide particle size is preferably 700nm-900nm;

Step 2: The aluminum ingot is placed in a power frequency smelting holding furnace for melting. The melting temperature is 730-770 ° C, the melting time is 20-30 minutes, and the temperature is kept at 550 ° C for 5-10 minutes. Aluminum liquid. Step 3: Add nano-scale silicon carbide, zinc ingot, iron ingot, manganese ingot and nickel ingot to the surface of the above aluminum liquid, and raise the temperature of the power frequency melting and holding furnace to about 750 °C, and turn on the electric furnace vibration device. The alloy liquid is thoroughly mixed for 15-20 minutes.

Step 4: Adding a magnesium ingot to the alloy liquid described in the step 3), then charging the power frequency smelting holding furnace with a total amount of nitrogen of 0.01 MPa to 0.02 MPa, and refining for 10-15 minutes.

Step 5: Sampling the refined alloy solution and analyzing its composition.

Step 8: Detect the extruded alloy rod and pack it into the warehouse.

The nano-sized silicon carbide aluminum alloy rod prepared according to the above-mentioned preparation method of the nano-sized silicon carbide aluminum alloy rod is composed of the following components: nano-scale silicon carbide accounts for 3% of the total weight, magnesium accounts for 0.8% of the total weight, and zinc accounts for total 0.3% by weight, manganese accounts for 0.25% of the total weight, nickel accounts for 0.1% of the total weight, iron accounts for 0.1% of the total weight, and the unavoidable impurities account for 0.2% of the total weight. The balance is aluminum.

Example 3

Preparation method of nano-scale silicon carbide aluminum alloy rod:

Step 1: Weigh 2% of the total weight of nano-sized silicon carbide, 0.5% of the total weight of magnesium, 0.15% of the total weight of zinc, 0.15% of the total weight of manganese, accounting for 0.08% of the total weight. Nickel, the total weight of 0.06% of iron, accounting for 97.06% of the total weight of aluminum, the nano-sized silicon carbide particle size is preferably 700nm-900nm;

Step 2: The aluminum ingot is placed in a power frequency smelting holding furnace for melting. The melting temperature is 730-770 ° C, the melting time is 20-30 minutes, and the temperature is kept at 550 ° C for 5-10 minutes. Aluminum liquid.

Step 3: Add nano-scale silicon carbide, zinc ingot, iron ingot, manganese ingot and nickel ingot to the surface of the above aluminum liquid, and raise the temperature of the power frequency melting and holding furnace to about 750 °C, and turn on the electric furnace vibration device. The alloy liquid is thoroughly mixed for 15-20 minutes. Step 4: Adding a magnesium ingot to the alloy liquid described in the step 3), and then charging the power frequency melting and holding furnace with a total amount of nitrogen of 0.01 MPa to 0.02 MPa, and refining for 10-15 minutes.

Step 5: Sampling the refined alloy solution and analyzing the chemical composition of the refined alloy solution using a spectrometer.

Step 6: The refined alloy liquid whose composition is determined to have a chemical composition within a prescribed range is cast into a 10 mm-150 mm diameter aluminum alloy cast rod by continuous casting.

Step 7: Stripping the above aluminum alloy rod, and then extruding the stripped aluminum alloy rod with an extruder.

Step 8: Detect the extruded alloy rod and pack it into the warehouse.

The nano-sized silicon carbide aluminum alloy rod prepared according to the above preparation method of the nano-sized silicon carbide aluminum alloy rod is composed of the following components: nano-scale silicon carbide accounts for 2% of the total weight, magnesium accounts for 0.5% of the total weight, and zinc accounts for total 0.15% by weight, manganese accounts for 0.15% of the total weight, nickel accounts for 0.08% of the total weight, iron accounts for 0.06% of the total weight, and the unavoidable impurities account for 0.2% of the total weight. The balance is aluminum. Example 4

Step 1: Weigh 3% of the total weight of silicon carbide, 0.8% of the total weight of magnesium, 0.1% of the total weight of zinc, 0.2% of the total weight of manganese, 0.1% of the total weight of nickel , the total weight of 0.02% of iron, accounting for 95.78% of the total weight of aluminum, the nano-sized silicon carbide particle size is preferably 700nm-900nm _;

Step 4: Adding a magnesium ingot to the alloy liquid described in the step 3), and then charging the power frequency melting and holding furnace with a total amount of nitrogen of 0.01 MPa to 0.02 MPa, and refining for 10-15 minutes. Step 5: Sampling the refined alloy liquid and analyzing the chemical composition of the refined alloy liquid by a spectrometer.

Step 7: The above aluminum alloy rod is stripped, and then the stripped aluminum alloy rod is extruded by a 1200-ton single-action extruder.

Step 8: Ultrasonic inspection of the extruded alloy rod is carried out and packaged into the warehouse.

The nano-sized silicon carbide aluminum alloy rod prepared according to the above-mentioned preparation method of the nano-sized silicon carbide aluminum alloy rod is composed of the following components: nano-scale silicon carbide accounts for 3% of the total weight, magnesium accounts for 0.8% of the total weight, and zinc accounts for total 0.1% by weight, manganese accounts for 0.2% of the total weight, nickel accounts for 0.1% of the total weight, iron accounts for 0.02% of the total weight, and the unavoidable impurities account for 0.2% of the total weight. The balance is aluminum. Example 5

Step 1: Weigh 2.5% of the total weight of nano-sized silicon carbide, 0.6% of the total weight of magnesium, 0.2% of the total weight of zinc, 0.18% of the total weight of manganese, 0.07% of the total weight of nickel , the total weight of 0.04% of iron, accounting for 96.41% of the total weight of aluminum, the nano-sized silicon carbide particle size is preferably 700nm-900nm;

Step 5: Sampling the refined alloy liquid and analyzing the chemical composition of the refined alloy liquid by a spectrometer. Step 6: The refined alloy liquid whose composition is determined to have a chemical composition within a predetermined range is cast into a 10 mm-150 mm diameter aluminum alloy cast rod by continuous casting.

The nano-sized silicon carbide aluminum alloy rod prepared according to the above preparation method of the nano-sized silicon carbide aluminum alloy rod is composed of the following components: nano-scale silicon carbide accounts for 2.5% of the total weight, magnesium accounts for 0.6% of the total weight, and zinc accounts for total 0.2% by weight, manganese accounts for 0.18% of the total weight, nickel accounts for 0.07% of the total weight, iron accounts for 0.04% of the total weight, and the unavoidable impurity sum accounts for 0.2% of the total weight. The balance is aluminum. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; the invention is modified or equivalently substituted without departing from the spirit and scope of the invention. Within the scope of protection.

Claims

Claim

A method for preparing a nano-sized silicon carbide aluminum alloy rod, comprising the following steps:

1) Weighing 2-3% of nano-scale silicon carbide by weight, 0.4-0.8% of total weight of magnesium, 0.05-0.3% of total weight of zinc, and 0.05-0.25% of total weight of manganese, accounting for a total weight of 0.05-0.1% of nickel, 0.02-0.1% of total weight of iron, accounting for 95.45-97.43% of total weight of aluminum;

2) The aluminum ingot is placed in a power frequency melting and holding furnace for melting, the melting temperature is: 730-770 ° C, the melting time is 20-30 minutes, and the temperature is maintained at 550 ° C for 5-10 minutes, Aluminum liquid

4) adding the magnesium ingot to the alloy liquid described in the step 3), and then charging the power frequency melting and holding furnace with a total amount of inert gas of 0.01 MPa to 0.02 MPa, and refining for 10-15 minutes. , obtaining a refined alloy liquid;

5) sampling the refined alloy liquid and detecting its composition;

6) casting the refined alloy liquid whose chemical composition is within the specified range in the step 5) into an aluminum alloy cast rod;

7) stripping the aluminum alloy cast rod, and then extruding the stripped aluminum alloy rod with an extruder;

8) Detect the extruded aluminum alloy rod and pack it into the warehouse.

The method for preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein the nano-sized silicon carbide has a particle diameter of 700 nm to 900 nm.

3. The method of preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein the inert gas according to step 4) is nitrogen.

4. The method for preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein Then, step 5) includes analyzing the chemical composition of the refined alloy liquid by using a spectrometer.

5. The method of preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein the step 6) further comprises casting the aluminum alloy cast rod by continuous casting.

The method for preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein the aluminum alloy cast rod has a diameter of 10 mm to 150 mm.

7. The method of preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein the extruder is a 1200-ton single-action extruder.

8. The method for preparing a nano-sized silicon carbide aluminum alloy rod according to claim 1, wherein the flaw detection method described in the step 8) is ultrasonic flaw detection.

The nano-sized silicon carbide aluminum alloy rod prepared by the method for preparing a nano-sized silicon carbide aluminum alloy rod according to any one of claims 1 to 8, characterized in that it is composed of the following components: nano-scale silicon carbide 2-3% of the total weight, magnesium accounts for 0.4-0.8% of the total weight, zinc accounts for 0.05-0.3% of the total weight, manganese accounts for 0.05-0.25% of the total weight, and nickel accounts for 0.05-0.1% of the total weight. The total weight is 0.02-0.1%, the sum of the unavoidable impurities is 0.2% of the total weight, and the balance is aluminum.