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Highly corrosion-resistant cast magnesium-aluminum alloy for pump body and manufacturing method thereof

A manufacturing method and high corrosion resistance technology, applied in the field of cast aluminum alloy, can solve the problems of tensile strength, low elongation, poor casting performance, unsatisfactory comprehensive mechanical properties of cast aluminum alloy, etc., and achieve good mechanical properties

Active Publication Date: 2015-11-25
ANHUI TIANMA PUMP VALVE GROUP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The shells of various pumps need to withstand high pressure, especially the high instantaneous pressure. Cast aluminum alloy is welcomed by many pump manufacturers because of its light matrix, but the comprehensive mechanical properties of cast aluminum alloy are not ideal. The tensile strength and elongation are low, and the casting performance is poor, which cannot meet the production needs of manufacturers

Method used

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Embodiment Construction

[0009] A high-corrosion-resistant cast magnesium-aluminum alloy for a pump body, the composition of which is composed of Mg7.5-10.5, Mn2.2-2.4, La0.06-0.09, Ce0.2-0.25, Pr0.05- 0.08, Y0.3-0.36, Mo0.05-0.08, Ga0.02-0.04, Zn0.8-1.0, In0.02-0.04, and the balance is aluminum.

[0010] The manufacturing method of high corrosion-resistant cast magnesium-aluminum alloy for the pump body: add electrolytic aluminum in the intermediate frequency furnace, heat to 675-725°C, add other alloy components after the aluminum material is melted, heat up to 730-750°C, and stir for 30-45 minutes , remove slag, detect and adjust the alloy composition; then, add refining agent, stir for 30-40 minutes, and then remove slag; cool down to 690-780°C, and cast; after casting, cool down to 320-140°C / hour 380°C, keep warm for 2-3 hours; then, heat up to 470-490°C at a rate of 80-90°C / hour, keep warm for 3-4 hours; then heat up to 520-550°C at a rate of 110-130°C / hour, keep warm 1-2 hours; then cool down ...

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PUM

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Abstract

A high anti-corrosion casting Mg-Al alloy for pump bodies is characterized by comprising the components by the mass percentage: 7.5-10.5% of Mg, 2.2-2.4% of Mn, 0.06-0.09% of La, 0.2-0.25% of Ce, 0.05-0.08% of Pr, 0.3-0.36% of Y, 0.05-0.08% of Mo, 0.02-0.04% of Ga, 0.3-0.5% of Mo, 0.8-1.0% of Zn, 0.02-0.04% of In, and the balance being Al. The Mg-Al alloy provided by the invention has the corrosion rate of a salt spray test of only about 0.1 mg / cm<2>.d, has good mechanical properties, and is suitable for the pump bodies used in coastal areas.

Description

technical field [0001] The invention relates to an aluminum alloy manufacturing technology, more specifically a casting aluminum alloy technology. Background technique [0002] The shells of various pumps need to withstand high pressure, especially the high instantaneous pressure. Cast aluminum alloy is welcomed by many pump manufacturers because of its light matrix, but the comprehensive mechanical properties of cast aluminum alloy are not ideal. The tensile strength and elongation are low, and the casting performance is poor, which cannot meet the production needs of manufacturers. Contents of the invention [0003] The object of the present invention is to provide a high-corrosion-resistant cast magnesium-aluminum alloy for a pump body and a manufacturing method thereof. [0004] The present invention takes following technical scheme: [0005] A high-corrosion-resistant cast magnesium-aluminum alloy for a pump body is characterized in that its composition is composed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/06C22C1/02
Inventor 王成华周峰王成荣
Owner ANHUI TIANMA PUMP VALVE GROUP
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