Nonmetal refiner for aluminum alloy

Abstract

The invention discloses a non-metal refiner for an aluminum alloy. The non-metal refiner is prepared from composite rare earth. The nonmetal refiner is prepared from the composite rare earth, so that the purposes of reducing the production cost and improving the mechanical property and plasticity of the aluminum alloy are achieved.

Description

Technical Field

[0001] The invention relates to the field of aluminum alloy production and application, and in particular to a non-metallic refiner for aluminum alloy. Background Art

[0002] In the aluminum alloy manufacturing process, due to the low melting point of aluminum, large grains are prone to occur, which affects the mechanical properties and plasticity of the material. The refiner product has an excellent refinement effect, improves the surface quality of the casting, and makes the casting obtain fine equiaxed crystals, especially reduces the cold shut of the casting and eliminates the hairy crystals and columnar crystals, which can effectively overcome casting cracks and improve the appearance of the casting. In the prior art, metal refiners are commonly used, but there are problems such as high cost and unstable effect.

[0003] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a non-metallic refiner for aluminum alloy, so as to achieve the purpose of reducing production costs and improving the mechanical properties and plasticity of aluminum alloy.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] The invention discloses a non-metallic refiner for aluminum alloy, which is made of composite rare earth.

[0007] The present invention achieves the purpose of reducing production costs and improving the mechanical properties and plasticity of the aluminum alloy by providing a non-metallic refiner for aluminum alloy made of composite rare earth.

[0008] The composite rare earth comprises the following components:

[0009] Lanthanum chloride (including crystal water): 40% - 50%;

[0010] Cerium fluoride: 15% - 25%;

[0011] Ruthenium oxide: 7% - 13%;

[0012] Alumina: 2% - 8%;

[0013] Barium chloride: 6% - 10%;

[0014] Potassium chloride: 10%-14%.

[0015] More preferably, the composite rare earth is composed of the following components:

[0016] Lanthanum chloride (containing crystal water): 45%;

[0017] Cerium fluoride: 20%;

[0018] Ruthenium oxide: 10%;

[0019] Alumina: 5%;

[0020] Barium chloride: 8%;

[0021] Potassium chloride: 12%.

[0022] More preferably, the composite rare earth is composed of the following components:

[0023] Lanthanum chloride (containing crystal water): 40%;

[0024] Cerium fluoride: 15%;

[0025] Ruthenium oxide: 13%;

[0026] Alumina: 8%;

[0027] Barium chloride: 10%;

[0028] Potassium chloride: 14%.

[0029] More preferably, the composite rare earth is composed of the following components:

[0030] Lanthanum chloride (containing crystal water): 50%;

[0031] Cerium fluoride: 25%;

[0032] Ruthenium oxide: 7%;

[0033] Alumina: 2%;

[0034] Barium chloride: 6%;

[0035] Potassium chloride: 10%.

[0036] More preferably, the composite material further comprises 2% of graphite.

[0037] A method for preparing a composite rare earth non-metallic refiner for aluminum alloy comprises the following steps:

[0038] (1) Prepare the raw materials of each component;

[0039] (2) Weigh each component according to a certain ratio and mix them evenly;

[0040] (3) placing the mixed powder in a reaction furnace and heating it to a certain temperature under the protection of an inert gas to carry out a solid phase reaction;

[0041] (4) After the reaction is completed, the product is cooled to room temperature and subjected to post-processing such as crushing and screening to obtain the product.

[0042] More preferably, the heating in step (3) is to a temperature of 700°C-900°C.

[0043] The present invention has the following advantages:

[0044] The present invention achieves the purpose of reducing production costs and improving the mechanical properties and plasticity of the aluminum alloy by providing a non-metallic refiner for aluminum alloy made of composite rare earth. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below.

[0046] The present invention provides a non-metallic refiner for aluminum alloys. The working principle of the non-metallic refiner for aluminum alloys is to provide a non-metallic refiner for aluminum alloys made of composite rare earths, so as to achieve the purpose of reducing production costs and improving the mechanical properties and plasticity of aluminum alloys.

[0047] The present invention is further described in detail below with reference to examples and specific implementation methods.

[0048] Embodiment 1:

[0049] A non-metallic refiner for aluminum alloy, made of composite rare earth. The composite rare earth contains the following components:

[0050] Lanthanum chloride (containing crystal water): 45%;

[0051] Cerium fluoride: 20%;

[0052] Ruthenium oxide: 10%;

[0053] Alumina: 5%;

[0054] Barium chloride: 8%;

[0055] Potassium chloride: 12%.

[0056] The preparation method of composite rare earth is as follows:

[0057] (1) Prepare the raw materials according to the above components, and prepare graphite according to the total amount of composite rare earth, wherein the graphite and composite rare earth are prepared in a ratio of 1:100;

[0058] (2) Weigh the above components and graphite according to the proportion and mix them evenly;

[0059] (3) placing the mixed powder in a reaction furnace and heating it to 900°C under the protection of an inert gas to carry out a solid phase reaction;

[0060] (4) After the reaction is completed, the product is cooled to room temperature and subjected to post-processing such as crushing and screening to obtain the product.

[0061] Embodiment 2:

[0062] A non-metallic refiner for aluminum alloy, made of composite rare earth. The composite rare earth contains the following components:

[0063] Lanthanum chloride (containing crystal water): 40%;

[0064] Cerium fluoride: 15%;

[0065] Ruthenium oxide: 13%;

[0066] Alumina: 8%;

[0067] Barium chloride: 10%;

[0068] Potassium chloride: 14%.

[0069] Embodiment three:

[0070] A non-metallic refiner for aluminum alloy, made of composite rare earth. The composite rare earth contains the following components:

[0071] Lanthanum chloride (containing crystal water): 50%;

[0072] Cerium fluoride: 25%;

[0073] Ruthenium oxide: 7%;

[0074] Alumina: 2%;

[0075] Barium chloride: 6%;

[0076] Potassium chloride: 10%.

[0077] The refiner made of the composite rare earth prepared by the preparation method provided by the present invention has the following advantages:

[0078] 1. Improved the refinement effect and increased the strength and toughness of the material;

[0079] 2. It uses low-cost raw materials and has a simple preparation process, which reduces production costs and improves economic benefits.

[0080] 3. The synergistic effect between the components improves the stability and heat resistance of the refiner.

[0081] 4. No harmful substances are discharged during the preparation process, which meets environmental protection requirements.

[0082] Through the above method, the present invention provides a non-metallic refiner for aluminum alloys, which provides a non-metallic refiner for aluminum alloys made of composite rare earth, thereby achieving the purpose of reducing production costs and improving the mechanical properties and plasticity of aluminum alloys.

[0083] The above is only a preferred embodiment of the non-metallic refiner for aluminum alloy disclosed in the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the protection scope of the present invention.

Claims

1. A non-metallic refiner for aluminum alloy, characterized in that: Made of composite rare earth.

2. A non-metallic refiner for aluminum alloy according to claim 1, characterized in that: The composite rare earth comprises the following components: Lanthanum chloride (including crystal water): 40% - 50%; Cerium fluoride: 15% - 25%; Ruthenium oxide: 7% - 13%; Alumina: 2% - 8%; Barium chloride: 6% - 10%; Potassium chloride: 10%-14%.

3. A non-metallic refiner for aluminum alloy according to claim 1, characterized in that: The composite rare earth is composed of the following components: Lanthanum chloride (containing crystal water): 45%; Cerium fluoride: 20%; Ruthenium oxide: 10%; Alumina: 5%; Barium chloride: 8%; Potassium chloride: 12%.

4. A non-metallic refiner for aluminum alloy according to claim 2, characterized in that: The composite rare earth is composed of the following components: Lanthanum chloride (containing crystal water): 40%; Cerium fluoride: 15%; Ruthenium oxide: 13%; Alumina: 8%; Barium chloride: 10%; Potassium chloride: 14%.

5. The non-metallic refiner for aluminum alloy according to claim 2, characterized in that: The composite rare earth is composed of the following components: Lanthanum chloride (containing crystal water): 50%; Cerium fluoride: 25%; Ruthenium oxide: 7%; Alumina: 2%; Barium chloride: 6%; Potassium chloride: 10%.

6. A non-metallic refiner for aluminum alloy according to any one of claims 1 to 5, characterized in that: It also contains 2% graphite.

7. A method for preparing a composite rare earth non-metallic refiner for aluminum alloy, characterized in that: It includes the following steps: (1) Prepare the raw materials of each component; (2) Weigh each component according to a certain ratio and mix them evenly; (3) placing the mixed powder in a reaction furnace and heating it to a certain temperature under the protection of an inert gas to carry out a solid phase reaction; (4) After the reaction is completed, the product is cooled to room temperature and subjected to post-treatment such as crushing and screening to obtain the product.

8. The method for preparing a composite rare earth non-metallic refiner for aluminum alloy according to claim 7, characterized in that: In step (3), the temperature is heated to 700°C-900°C.