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High-strength antifriction aluminum alloy

An aluminum alloy, high-strength technology, applied in the field of aluminum alloys, can solve the problems of reduced overall efficiency, low strength performance, reduced matching accuracy, etc., and achieve the effect of improving strength and anti-friction performance, improving material mechanical properties, and excellent processing performance.

Active Publication Date: 2015-04-29
安徽熠辉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of copper alloy or steel-tin bronze sintered composite bimetal not only has a large weight, but also consumes a lot of copper, which is costly; more importantly, most of the gear pump body materials are now made of aluminum alloy. Under the condition of high speed, the working temperature is high, and the expansion coefficients of iron, copper and aluminum are different, resulting in a decrease in fit accuracy and a decrease in the overall efficiency of the pump.
In the existing aluminum alloys, Si is usually used as a strengthening element, but the strength performance is not high. For example, SAE788 aluminum alloy is used for bearing bushes. The main alloying elements are Sn: 6-8.8%, Pb: 1.5-2.5%, Si: 2.25-2.75%. , its tensile strength σb is 138-159MPa, which cannot meet the strength and friction performance requirements of high-pressure gear pumps, and due to the existence of heavy metal lead, it does not meet the requirements of environmental protection

Method used

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  • High-strength antifriction aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The high-strength anti-friction aluminum alloy of the present invention is a cast aluminum alloy, and its specific chemical composition is shown in Table 1. The equipment used is a crucible resistance furnace.

[0018] Casting pouring molding process, the specific steps are:

[0019] 1) Ingredients: According to the formula requirements, entrust aluminum alloy material manufacturers to produce remelted aluminum alloy ingots;

[0020] 2) Melting: Heat and melt the aluminum alloy ingot in a crucible boiler at a temperature of 740±5°C;

[0021] 3) Refining and degassing: use powder spraying refining agent to carry out powder spraying and refining on the aluminum alloy solution;

[0022] 4) Hydrogen measurement: The refined aluminum liquid is tested for hydrogen in a vacuum environment <0.02MPa, and cast after passing the hydrogen measurement;

[0023] 5) Pouring molding: Pouring the modified aluminum alloy melt into the mold cavity, and at the same time using the quick ...

Embodiment 2

[0030] For the high-strength anti-friction aluminum alloy of this embodiment, see Table 3 for the specific chemical composition and Table 4 for the properties.

[0031]

[0032]

[0033] The casting pouring molding process and the equipment used in this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0035] For the high-strength anti-friction aluminum alloy of this embodiment, see Table 5 for the specific chemical composition and Table 6 for the properties.

[0036]

[0037]

[0038] The casting pouring molding process and the equipment used in this embodiment are the same as those in Embodiment 1.

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Abstract

The invention discloses a high-strength antifriction aluminum alloy which comprises the following chemical components in percentage by weight: 1.0-7.0% of tin, 3.0-7.0% of copper, 0.20-1.60% of manganese, 0.40-1.60% of silicon, 0.40-2.0% of magnesium, 0.01-1.0% of rare earth element scandium, at most 0.70% of impurities and the balance of aluminum. The aluminum alloy has the advantages of uniform and segregation-free components, fine structure and high tensile strength (up to 320-350 MPa). The friction factor is less than 0.02, and the aluminum alloy has excellent antifriction property and wear resistance. The aluminum alloy has the advantages of favorable processability and low cost.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a high-strength anti-friction aluminum alloy. Background technique [0002] In the hydraulic parts industry, gear pumps are products with a large quantity and a wide range. The positioning of the gears in the gear oil pump and the sealing of the end leakage are usually ensured by aluminum alloy bearing sleeves, copper alloys or steel-tin bronze sintered composite bimetallic side plates. Oil pump, the problem that prior art exists is: [0003] The use of copper alloy or steel-tin bronze sintered composite bimetal not only has a large weight, but also consumes a lot of copper, which is costly; more importantly, most of the gear pump body materials are now made of aluminum alloy. Under the condition of high speed, the working temperature is high, and the expansion coefficients of iron, copper and aluminum are different, resulting in a decrease in matching accuracy and a decrease in the overall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16
Inventor 段聪翀叶应钧
Owner 安徽熠辉新材料有限公司
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