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Aluminum alloy for special high-pressure oil pump shell and preparation method thereof

A high-pressure oil pump and aluminum alloy technology, which is applied in the field of aluminum alloy, can solve the problems of poor wear resistance and air tightness, reduce the performance and service life of the oil pump, and large thermal deformation, etc., achieve good wear resistance and air tightness, and broaden the application of new Good effect on field, casting and extrusion properties

Inactive Publication Date: 2013-05-15
龙口市丛林铝材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are problems such as large thermal deformation, high temperature resistance, wear resistance and poor air tightness in the special high-pressure oil pump shell made of aluminum alloy extruded pump body, which reduces the performance and service life of the oil pump, thereby affecting the sales of the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Embodiment 1, an aluminum alloy used for a special high-pressure oil pump housing, is characterized in that the weight percentage of the alloy composition is: Si: 7%, Cu: 1.6%, Mg: 0.5%, Mn: 0.15% , Ti: 0.25%, Fe≤0.4%, Sn≤0.01%, Pb≤0.01%, Ca≤0.03%, single impurity≤0.05%, total impurity≤0.15%, and the balance is aluminum.

[0017] The weight ratio of Mn and Fe is 0.66:1.

[0018] A method for preparing an aluminum alloy for a special high-pressure oil pump housing, comprising the following steps:

[0019] ①At a temperature of 755-765°C, put each raw material into a flame furnace for smelting according to the formula;

[0020] ②At a temperature of 745-755°C, inject common refining agent with argon gas and refine for 10-20 minutes;

[0021] ③After melt refining and removing the scum on the surface, sprinkle the sodium modifier evenly at a temperature of at least 740°C, then stir it into the melt, and let it stand for 10-20 minutes;

[0022] ④Semi-continuous direct water...

specific Embodiment approach 2

[0026] Specific embodiment two, an aluminum alloy used for a special high-pressure oil pump housing, characterized in that the weight percentage of the alloy composition is: Si: 5%, Cu: 1.3%, Mg: 0.7%, Mn: 0.3% , Ti: 0.3%, Fe≤0.4%, Sn≤0.01%, Pb≤0.01%, Ca≤0.03%, single impurity≤0.05%, total impurity≤0.15%, and the balance is aluminum.

[0027] The weight ratio of Mn and Fe is 0.6:1.

[0028] A method for preparing an aluminum alloy for a special high-pressure oil pump housing, comprising the following steps:

[0029] ①At a temperature of 755-765°C, put each raw material into a flame furnace for smelting according to the formula;

[0030] ②At a temperature of 745-755°C, inject common refining agent with argon gas and refine for 10-20 minutes;

[0031] ③After melt refining and removing the scum on the surface, sprinkle the sodium modifier evenly at a temperature of at least 740°C, then stir it into the melt, and let it stand for 10-20 minutes;

[0032] ④Semi-continuous direct ...

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Abstract

The invention relates to an aluminum alloy for a special high-pressure oil pump shell and a preparation method thereof. The alloy comprises the ingredients by weight percent: 5-7% of Si, 1.3-1.7% of Cu, 0.4-0.7% of Mg, 0.1-0.35% of Mn, 0.2-0.3% of Ti, 0.4% or less of Fe, 0.01% or less of Sn, 0.01% or less of Pb, 0.03% or less of Ca, 0.05% or less of single impurity, and the balance of aluminum, wherein the total impurities are 0.15% or less. The preparation method comprises the following steps of: smelting at 755-765 DEG C; spraying a common refining agent by argon at 745-755 DEG C; evenly scattering a sodium modifier under the temperature which is 740 DEG C at least, standing for 10-20 minutes; casting by a semi-continuous direct water cooling method; homogenizing a cast ingot, naturally cooling after discharging from a furnace; and carrying out heat treatment quenching after extruding and molding the homogenized cast ingot, and finally carrying out precipitation heat treatment. The aluminum alloy has the beneficial effects of good high temperature performance, thermal deformability, abrasive resistance, gas tightness and the like, is good in casting and extruding properties, and can be well applied to the special high-pressure oil pump shell.

Description

technical field [0001] The invention relates to an aluminum alloy used for a shell of a special high-pressure oil pump, and also relates to a preparation method of the aluminum alloy used for a shell of a special high-pressure oil pump. Background technique [0002] At present, there are problems such as large thermal deformation, high temperature resistance, wear resistance and poor air tightness in the special high-pressure oil pump shell made of aluminum alloy extruded pump body, which reduces the performance and service life of the oil pump, thereby affecting the sales of the product. . Contents of the invention [0003] The present invention aims at the deficiencies of the above-mentioned prior art, and provides an aluminum alloy used for a special high-pressure oil pump casing and a preparation method thereof. The alloy has good high temperature resistance, thermal deformation resistance, wear resistance and air tightness, and the casting and extrusion performance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22C1/06C22F1/043
Inventor 张培良王刚高安江李瑞清吴英杰苏本显
Owner 龙口市丛林铝材有限公司
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