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Method for producing large magnesium alloy ring by means of centrifugal casting

A technology of centrifugal casting and magnesium alloy, applied in the direction of casting molding equipment, casting mold, casting mold composition, etc., can solve the problem of small magnesium alloy castings, and achieve the effect of compact structure

Active Publication Date: 2014-01-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, magnesium alloy castings are relatively small, and the casting methods are mostly metal mold and pressure casting. So far, there has been no report on the production of large magnesium alloy castings by centrifugal casting.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A method for producing magnesium alloy large-scale ring parts by centrifugal casting, including mold preheating, heat-insulating paint application, determination of centrifugal pouring parameters, centrifugal pouring, and the like. Using AZ31 as the raw material, the outer diameter of the magnesium alloy ring produced is 3000 mm, the inner diameter is 2700 mm, and the height is 300 mm. The specific operation steps and process parameters are as follows:

[0029] 1. Mold preparation and preheating, prepare the centrifugal casting mold according to the design size requirements of the magnesium alloy ring. The mold is preheated to 250 degrees.

[0030] 2. Hang insulation coating

[0031] 1) Clean the rust, dust, residual paint, etc. on the surface of the mold, and strictly control the oil pollution;

[0032] 2) Hang the paint evenly on the inner surface of the mold with the paint slurry rolling method. Paint thickness 5mm. After coating and hanging, dry the mold at 400~...

Embodiment 2

[0042] A method for producing magnesium alloy large-scale ring parts by centrifugal casting, including mold preheating, heat-insulating paint application, determination of centrifugal pouring parameters, centrifugal pouring, and the like. Using AZ31 as the raw material, the outer diameter of the magnesium alloy ring produced is 2000 mm, the inner diameter is 1700 mm, and the height is 200 mm. The specific operation steps and process parameters are as follows:

[0043] 1. Mold preparation and preheating, prepare the centrifugal casting mold according to the design size requirements of the magnesium alloy ring. The mold is preheated to 220 degrees.

[0044] 2. Hang insulation coating

[0045] 1) Clean the rust, dust, residual paint, etc. on the surface of the mold, and strictly control the oil pollution;

[0046] 2) Hang the paint evenly on the inner surface of the mold with the paint slurry rolling method. Paint thickness 4mm. After coating and hanging, dry the mold at 400~...

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PUM

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Abstract

A method for producing a large magnesium alloy ring by means of centrifugal casting includes: preheating a mould; hanging thermal insulation coatings and determining centrifugal casting parameters; performing centrifugal casting and the like. The method is technically characterized by determination of rotation speed and casting speed. A centrifugal power device is started for centrifugal casting, the centrifugal rotation speed n is calculated according to the gravity coefficient formula as shown in the original text, n=29.9, wherein n refers to the centrifugal rotation speed, R refers to the radius (m) of the inner surface of a casting, and G refers to gravity coefficient. The method overcomes the shortcomings of an existing large magnesium alloy ring production process, is used for producing the large magnesium alloy ring with compact texture and high tensile strength, and has an important significance for magnesium alloy application and development of magnesium alloy centrifugal casting technology.

Description

technical field [0001] The invention belongs to the technical field of forming magnesium alloy materials, and in particular relates to a method for producing large-scale magnesium alloy rings by centrifugal casting. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in practical application. It has the advantages of low density, high specific strength, good electrical conductivity, thermal conductivity and casting performance, so it has broad application prospects in the fields of automobiles, instruments and aerospace. , known as the green environmental protection structural material in the 21st century. [0003] However, magnesium and most magnesium alloys are metals with a close-packed hexagonal structure, and their plastic deformation ability is poor at room temperature. Therefore, in recent decades, deformed magnesium alloy products such as plates, strips, and rods are mainly obtained from ordinary semi-continuous casting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D13/04B22D13/10B22C3/00C22C1/06C22C1/02
Inventor 彭晓东王艳光刘军威杨艳谢卫东李兆楠
Owner CHONGQING UNIV
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