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Sand cast high pressure pump head aluminum bronze

A high-pressure pump, aluminum bronze technology, applied in the field of aluminum bronze, can solve the problems of leakage, low density of castings, low plasticity and so on

Inactive Publication Date: 2016-03-09
TIANJIN SANTIAOSHI NONFERROUS METAL FOUNDRY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high aluminum content of the above-mentioned aluminum bronze, the strength is high, but the plasticity is low, that is, hard and brittle. This is because the cast structure is a coarse columnar crystal, α+γ 2 Due to the high volume of eutectoid, it is difficult to process (such as forging, etc.) deformation
At the same time, due to the thick wall thickness of the pump head castings (up to 350mm or more), the thick columnar crystals are easy to form concentrated shrinkage cavities and shrinkage porosity, the castings have low density, and cannot withstand high water pressure and leak. Submersible pump bottleneck

Method used

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  • Sand cast high pressure pump head aluminum bronze

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Embodiment Construction

[0007] The compositions of alloys 1 and 2 of the present invention are shown in the table below, and the general-purpose pump head aluminum bronze alloy is used as a comparative alloy, melted in an intermediate frequency electric furnace, refined with cryolite, degassed with dry nitrogen, and poured into a sand mold at 1160 ° C , cast into the same size pump head and tensile test rod, and carry out cutting processing, pump head for pressure test, test rod for tensile test, the results are shown in Table 1 below.

[0008] Table 1 Test result of the present invention

[0009]

[0010] Due to the addition of beneficial elements, the alloy of the invention refines the crystal grains, changes the structure, improves the mechanical properties, increases the elongation by nearly 70%, and more than doubles the pressure resistance of the casting of the pump head.

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Abstract

The invention provides aluminium bronze of a sand-casting high-pressure pump head, belonging to the technical field of new non-ferrous materials. The aluminium bronze comprises 9-11.5 % of Al, 2.5-5.0 % of Fe, less than or equal to 3.5 % of Mn, 3.0-6.0 % of Ni, 0.05-0.2 % of Sn, 0.01-0.5 % of Cr, 0.5-1.0 % of Zn, 0.015-0.2 %, and the balance being Cu and less than 1 % of usual impurities. The alloy is high in mechanical properties and pressure resistance of castings, and can be used in related fields of high-voltage submersible pump heads.

Description

technical field [0001] The present invention relates to an aluminum bronze used as a sand cast high pressure pump head. Background technique [0002] High pressure (pressure 200kg / cm2) used in seawater desalination, oil field and chemical engineering 2 Above) submersible pump head material is ZQAl10-4-4 (China), C95500 (USA), GB-CuAl10Ni (EC) and other aluminum bronze alloys. It is made of iron mold casting or iron mold casting plus forging, and then machined. Due to the high aluminum content of the above-mentioned aluminum bronze, the strength is high, but the plasticity is low, that is, hard and brittle. This is because the cast structure is a coarse columnar crystal, α+γ 2 Due to the high volume of eutectoid, it is difficult to process (such as forging, etc.) deformation. At the same time, due to the thick wall thickness of the pump head castings (up to 350mm or more), the thick columnar crystals are easy to form concentrated shrinkage cavities and shrinkage porosity, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/01B22D21/00
Inventor 薛志华曹颜顺杨鹏
Owner TIANJIN SANTIAOSHI NONFERROUS METAL FOUNDRY
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