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Centrifugal casting method of aluminum alloy impeller

An aluminum alloy impeller and centrifugal casting technology, which is applied to casting molding equipment, casting molds, and casting mold components, can solve the problems of low dimensional accuracy, poor surface quality of castings, and high production costs, and achieve high dimensional accuracy and good surface quality , the effect of high mechanical properties

Inactive Publication Date: 2012-07-18
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of high production cost, poor casting surface quality and low dimensional accuracy in the existing casting method, the present invention further proposes a centrifugal casting method for an aluminum alloy impeller

Method used

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  • Centrifugal casting method of aluminum alloy impeller
  • Centrifugal casting method of aluminum alloy impeller
  • Centrifugal casting method of aluminum alloy impeller

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Experimental program
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specific Embodiment approach 1

[0020] Specific Embodiment 1: The aluminum alloy impeller centrifugal casting method described in this embodiment is realized according to the following steps:

[0021] Step 1. Prepare the impeller wax mold: prepare the impeller wax mold according to the shape and size of the impeller, and then sand and dewax the impeller wax mold to obtain the impeller shell;

[0022] Step 2. Wax mold preheating: put the impeller shell obtained in step 1 into a resistance furnace for preheating, the preheating temperature is 400-500°C, and the preheating time is 2-4 hours;

[0023] Step 3. Tool treatment: Brush the surface of the tool in contact with the molten aluminum during casting and smelting with a water-based paint. The above-mentioned water-based paint is a solution of zinc oxide, talcum powder and water glass, and then put the above-mentioned tools into a resistance furnace for drying. The temperature is 300-400°C, and the drying time is 2-4 hours;

[0024] Step 4, using Al7Si alumi...

specific Embodiment approach 2

[0031] Embodiment 2: The preheating temperature in step 2 of this embodiment is 450°C. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: The preheating time in step 2 of this embodiment is 2 to 4 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a centrifugal casting method of an aluminum alloy impeller, which solves the problems of high production cost, poor quality of a casting surface and low size precision existing in the existing casting method. The centrifugal casting method of the aluminum alloy impeller comprises the following steps: firstly, preparing an impeller wax mould; secondly, preheating the wax mould; thirdly, processing tools; fourthly, smelting an alloy adopted for the impeller, namely smelting an Al7Si aluminum ingot, adding an Al-5Ti intermediate alloy for smelting, adding a pure Mg block for smelting, and adding an Al-10Sr intermediate alloy for smelting, namely, adding the Al-10Sr intermediate alloy to a graphite crucible, and finally performing degassing refinement after stirring smelting solution in the graphite crucible for 1-5 minutes; and fifthly, centrifugal casting for ensuring the formation and solidification of the alloy smelting solution under the action of the centrifugal force, wherein the solidification time is 3-15 minutes, and finally demoulding and cleaning the casting. The casting method in the invention is used for producing the impeller.

Description

technical field [0001] The invention relates to a casting method of an aluminum alloy impeller. Background technique [0002] Pump is a general-purpose machine with a wide range of applications. It is widely used in various fields of national economy such as petroleum, chemical industry, electric power, metallurgy, coal, environmental protection, shipbuilding, food, medicine, urban construction, transportation, civil and farmland water conservancy. As the core component of the pump, the impeller plays a decisive role in the overall performance of the entire equipment. The impeller is composed of a front cover, a rear cover and blades. The cover is a rotating body, and the blades are usually complex space surfaces. With the continuous improvement of production, living and technological level, the impeller is required to have good comprehensive performance. The performance of the impeller is not only related to the design level, but also closely related to the manufacturing l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/00B22D13/10B22C9/04
Inventor 王丽萍郭二军冯义成姜文勇
Owner HARBIN UNIV OF SCI & TECH
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