Aluminum casting alloy with strong mechanical performance

A casting aluminum alloy and mechanics technology, applied in the field of casting aluminum alloy, can solve the problems of poor tensile strength and elongation casting performance, unsatisfactory comprehensive mechanical performance, high tensile strength, etc., to improve mechanical performance and comprehensive mechanical performance , the effect of improving the strength of the alloy

Active Publication Date: 2010-06-30
HEFEI CHANGYUAN HYDRAULICS
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Problems solved by technology

[0002] The casing of the medium and high pressure gear pump needs to withstand relatively large pressure, especially the relatively large instantaneous pressure. At present, the comprehensive mechanical properties of cast aluminum alloys that meet the national standard GB / T8733-2000 in China are not ideal, or High tensile strength and low elongation, or low tensile strength and high elongation, or both tensile strength and elongation but poor casting performance

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  • Aluminum casting alloy with strong mechanical performance

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Embodiment Construction

[0015] In this embodiment, the composition of the cast aluminum alloy with high mechanical properties in terms of mass percentage is:

[0016] Silicon: 7.5%, copper: 2.8%, magnesium: 0.4%, manganese: 0.4%, zirconium: 0.2%, molybdenum 0.5%, titanium: 0.15%, iron≤0.25%, and the balance is aluminum.

[0017] or as:

[0018] Silicon: 9.5%, copper: 4.2%, magnesium: 0.6%, manganese: 0.6%, zirconium: 0.4%, molybdenum 0.7%, titanium: 0.35%, iron≤0.25%, and the balance is aluminum.

[0019] In specific implementation, various different compatibility forms (by mass percentage) can be obtained as listed in Table 1:

[0020]

[0021] The mechanical properties in the above table are the sampling values ​​of the body, and the hardness values ​​(HBS) are all greater than 120;

[0022] It can be seen from the above table: in group 1 and group 2, with the increase of copper content, the tensile strength increases and the elongation decreases;

[0023] It can be seen from group 3 and grou...

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Abstract

The invention relates to an aluminum casting alloy with strong mechanical performance, which is characterized by comprising 7.5-9.5 percent of silicon, 2.8-4.2 percent of copper, 0.4-0.6 percent of magnesium, 0.4-0.6 percent of manganese, 0.2-0.4 percent of zirconium, 0.5-0.7 percent of molybdenum, 0.15-0.35 percent of titanium, less than or equal to 0.25 percent of iron, less than or equal to 0.15 percent of others, and the remaining is aluminum. The performance index of the invention is capable of reaching that the tensile strength is more than or equal to 400 MPa, and the elongation percentage is more than or equal to 4; and the utility model is suitable for the housing of a middle-pressure or a high-pressure gear pump.

Description

technical field [0001] The present invention relates to modified aluminum alloys, more particularly to a cast aluminum alloy. Background technique [0002] The casing of the medium and high pressure gear pump needs to withstand relatively large pressure, especially the relatively large instantaneous pressure. At present, the comprehensive mechanical properties of cast aluminum alloys that meet the national standard GB / T8733-2000 in China are not ideal, or High tensile strength and low elongation, or low tensile strength and high elongation, or both tensile strength and elongation but poor casting performance. In practical application, an aluminum alloy ingot with a tensile strength greater than 400Mpa and an elongation greater than 4%, which is suitable for gravity casting or low pressure casting, is required. Contents of the invention [0003] In order to avoid the disadvantages of the above-mentioned prior art, the present invention provides a cast aluminum alloy with h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02
Inventor 李逸人臧辉东叶昌山
Owner HEFEI CHANGYUAN HYDRAULICS
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