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A method and device for near-liquidus differential pressure casting of large complex magnesium alloy components

A near-liquidus, differential pressure casting technology, applied in the field of casting, can solve the problems of threatening the life safety of operators, prone to thermal decomposition, scrapping of molten metal, etc., to avoid pyrolysis, avoid insufficient casting, and have strong integrity Effect

Active Publication Date: 2021-11-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, traditional casting requires a higher temperature to ensure the high fluidity of the molten metal. The binder of the resin sand mold is prone to thermal decomposition under the high-temperature baking of the molten metal, and releases oxidative gas to react with the molten magnesium alloy, resulting in magnesium alloy The molten alloy burns or even explodes during the solidification process, which not only makes the entire furnace of molten metal scrapped, but also threatens the safety of workers

Method used

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  • A method and device for near-liquidus differential pressure casting of large complex magnesium alloy components
  • A method and device for near-liquidus differential pressure casting of large complex magnesium alloy components

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Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, and examples of the illustrated embodiments are illustrated in the drawings, wherein like or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] Such as figure 1 The casting device shown includes a first lower tank 1, a second lower tank 2, a deflector 3, a middle tank 4 and an upper tank 5;

[0033] The first lower tank 1 is provided with a first heat preservation crucible 14, the first lower tank temperature control furnace 13 is arranged between the first heat preservation crucible 14 and the outer wall of the first lower tank 1, and the first lower tank 1 side wall is provided with The first lower tank intake valve 11 and the first ...

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Abstract

The invention provides a large-scale complex magnesium alloy component near liquidus pressure difference casting method, belonging to the field of magnesium alloy casting, based on the principle of controlled diffusion solidification, by mixing two kinds of alloy mother liquids with different components and different temperatures to obtain a near liquid phase Magnesium alloy casting liquid with linear temperature and high fluidity, based on the anti-gravity casting method, uses pressure to drive magnesium alloy casting liquid to fill the sand mold from bottom to top, and cools and solidifies at a pressure higher than the environment to complete the casting. The present invention also provides a casting device applied to the above casting method, including a first lower tank and a second lower tank for holding two kinds of mother liquors, a middle tank for mixing mother liquors, an upper tank for filling mold tank, a deflector is provided between the lower tank and the middle tank, the lower tank and the middle tank are connected through a riser pipe, and the middle tank and the upper tank are connected through a riser pipe. The invention can effectively reduce the casting temperature of the magnesium alloy, and avoid burning caused by high temperature during resin sand mold differential pressure casting.

Description

technical field [0001] The invention belongs to the field of casting, and in particular relates to a casting method and a casting device of a large complex magnesium alloy component near liquidus differential pressure for aerospace. Background technique [0002] Generally, large and complex magnesium alloy high-end components used in aerospace, such as magnesium alloy cabins, casings, etc., require high precision in shape and size, so resin sand molds are used for anti-gravity casting. However, traditional casting requires a higher temperature to ensure the high fluidity of the molten metal. The binder of the resin sand mold is prone to thermal decomposition under the high-temperature baking of the molten metal, and releases oxidative gas to react with the molten magnesium alloy, resulting in magnesium alloy The molten alloy burns or even explodes during the solidification process, which not only makes the entire furnace of molten metal scrapped, but also threatens the safet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04B22D1/00
CPCB22D1/00B22D18/04
Inventor 赵信毅刘光磊赵国平刘满平雷玉成李海超孙剑飞曹福洋宁志良
Owner JIANGSU UNIV
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