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Composite refining and modifying agent capable of improving friction and wear properties of multi-element aluminum-silicon alloy

A technology for refining modifiers and aluminum-silicon alloys, which is applied in the field of casting aluminum-silicon alloy preparation

Inactive Publication Date: 2015-02-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The compound refinement modifier of the present invention is supplemented with a variety of alloy elements, on the one hand, it avoids that the single refinement modifier does not improve the comprehensive performance of cast aluminum-silicon alloy. On the other hand, it improves the disadvantages of adding multiple fine modifiers at the same time, which is complicated and difficult to control

Method used

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  • Composite refining and modifying agent capable of improving friction and wear properties of multi-element aluminum-silicon alloy

Examples

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Embodiment 1

[0012] The material is cast aluminum-silicon alloy, and the raw materials are commercially available. The specific chemical composition (mass percentage) is: Si 7-8%, Cu 3-4%, Mg 0.3-0.4%, Mn 0.2-0.3%, Zn 0.4-0.5 %, Fe≤0.35%, the rest is Al. Electromagnetic induction graphite crucible aluminum melting furnace is used for melting. In addition to Mg, Zn and composite refinement modifier, other raw materials are added into the graphite crucible, melted at 775°C, cooled to 735°C and added with Mg and Zn, and then added with composite refinement modifier (chemical composition is calculated by mass percentage, Ti is 10%, Cr is 8%, Ni is 8%, Sr is 8%, Ce is 5%, La is 5%, Nb is 5%, Pr is 3%, Er is 3%, Eu is 3%, Y is 3%, Ba is 3%, B is 2%, Na is 2%, V is 1%, and the rest is Al), and the addition amount is 0.2%. Then, the commercially available HGJ-2 aluminum alloy sodium-free refining slag and degasser was used for degassing treatment. The addition amount was 0.5% of the total mass o...

Embodiment 2

[0014] The material is cast aluminum-silicon alloy, and the raw materials are commercially available. The specific chemical composition (mass percentage) is: Si 7-8%, Cu 3-4%, Mg 0.3-0.4%, Mn 0.2-0.3%, Zn 0.4-0.5 %, Fe≤0.35%, the rest is Al. Electromagnetic induction graphite crucible aluminum melting furnace is used for melting. In addition to Mg, Zn and composite refinement modifier, other raw materials are added into the graphite crucible, melted at 775°C, cooled to 735°C and added with Mg and Zn, and then added with composite refinement modifier (chemical composition is calculated by mass percentage, Ti is 14%, Cr is 10%, Ni is 10%, Sr is 10%, Ce is 7%, La is 7%, Nb is 7%, Pr is 4%, Er is 4%, Eu is 4%, Y is 4%, Ba is 4%, B is 3%, Na is 3%, V is 2%, and the rest is Al), and the addition amount is 0.8%. Then, the commercially available HGJ-2 aluminum alloy sodium-free refining slag and degasser was used for degassing treatment. The addition amount was 0.5% of the total mas...

Embodiment 3

[0016] The material is cast aluminum-silicon alloy, and the raw materials are commercially available. The specific chemical composition (mass percentage) is: Si 7-8%, Cu 3-4%, Mg 0.3-0.4%, Mn 0.2-0.3%, Zn 0.4-0.5 %, Fe≤0.35%, the rest is Al. Electromagnetic induction graphite crucible aluminum melting furnace is used for melting. In addition to Mg, Zn and composite refinement modifier, other raw materials are added into the graphite crucible, melted at 775°C, cooled to 735°C and added with Mg and Zn, and then added with composite refinement modifier (chemical composition is calculated by mass percentage, Ti is 11%, Cr is 8%, Ni is 9%, Sr is 8%, Ce is 6%, La is 6%, Nb is 5%, Pr is 3.5%, Er is 3.5%, Eu is 3.5%, Y is 3%, Ba is 3%, B is 2.5%, Na is 2%, V is 1.5%, and the rest is Al), and the addition amount is 0.4% of the total mass of the alloy liquid. Then use a commercially available degasser for degassing treatment, the addition amount is 0.5% of the total mass of the alloy ...

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Abstract

The invention discloses a composite refining and modifying agent capable of improving friction and wear properties of multi-element aluminum-silicon alloy, and belongs to the technical field of aluminum-silicon alloy. The composite refining and modifying agent comprises the following ingredients in percentage by mass: 10-14% of Ti, 8-10% of Cr, 8-10% of Ni, 8-10% of Sr, 5-7% of Ce, 5-7% of La, 5-7% of Nb, 3-4% of Pr, 3-4% of Er, 3-4% of Eu, 3-4% of Y, 3-4% of Ba, 2-3% of B, 2-3% of Na, 1-2% of V and the balance being Al. The composite refining and modifying agent is represented as massive grey white alloy, particle size range is 0.1-20mm, melting point range is 850-1150 DEG C and effective addition range is 0.2-0.8%; and the composite refining and modifying agent disclosed by the invention can significantly improve friction and wear properties of multi-element aluminum-silicon alloy.

Description

technical field [0001] The present invention belongs to the technical field of casting aluminum-silicon alloy preparation, and particularly refers to a compound refinement modifier for improving the friction and wear properties of multi-element aluminum-silicon alloy. Background technique [0002] High speed, energy saving, environmental protection, safety and comfort are the eternal themes of the development of the automobile industry, and lightweight is the most direct and effective way to achieve the goal of appeal. As a new type of material, aluminum alloy has been widely used in the lightweight construction of automobiles. According to statistics, in the past 20 years, the total output of aluminum alloy castings in the world has increased at an average annual rate of about 3%, and 60% to 70% of the total output is used in the automotive industry. This is because cast aluminum alloys have excellent casting properties, and appropriate alloys and casting methods can be se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/04C22C1/06
Inventor 刘光磊司乃潮万浩丁冉王宏健王正军
Owner JIANGSU UNIV
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