High-nitrogen composite ceramic sprue cap for casting aluminum alloy

A technology of high nitrogen composite ceramics and aluminum alloys, which is applied in casting molding equipment, molds, mold components, etc., and can solve problems such as easy adhesion to molten aluminum, easy corrosion of gate caps, and easy deformation or cracking of gate caps. , to achieve the effect of excellent strength

Active Publication Date: 2013-10-02
LIAONING YIFEI TECH
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Problems solved by technology

[0003] Among the existing ceramics, there are ceramic products directly made of silicon carbide materials, but the performance of ceramic products made of a single material cannot meet the actual needs, so it needs to be compounded, but what material is compounded to obtain the best effect , which requires a lot of experimental resear

Method used

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Embodiment Construction

[0011] 1. Ingredients: In the total composition, by mass percentage, silicon nitride 5%-10%, aluminum nitride 30%-50%, titanium dioxide 20%-40%, silicon dioxide 10%-20%, nitrogen Magnesium chloride 5%-10% constitutes the raw material of high nitrogen composite ceramics.

[0012] 2. Blank making: Mix and stir the high-nitrogen composite ceramic raw materials evenly, then add a set amount of water, continue to stir to form a paste, and then pour or press to form it. It is poured into a gypsum mold, formed by absorbing water, and becomes a high-nitrogen composite ceramic blank after demoulding. Among them, the press molding is to add the pasty high-nitrogen composite ceramic raw material into a metal mold, form it by pressure, and become a high-nitrogen composite ceramic blank after demoulding.

[0013] 3. Firing: Add the dried high-nitrogen composite ceramic billet into the gas-fired sintering kiln, and sinter at a temperature of 1500-2000 degrees Celsius for 20-30 hours. The s...

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Abstract

The invention relates to a high-nitrogen composite ceramic sprue cap for casting aluminum alloy. The sprue cap is made from silicon nitride, aluminium nitride, titanium dioxide, silicon dioxide and magnesium nitride through pre-forming and sintering. The silicon nitride, the aluminium nitride, the titanium dioxide, the silicon dioxide and the magnesium nitride are taken as raw materials, so that the nitride proportion in the manufactured ceramic sprue cap is large, and the sprue cap has excellent strength, toughness, high temperature resistance, corrosion resistance and non-sticky aluminum performance. The high-nitrogen composite ceramic sprue cap is suitable for casting of aluminum alloy.

Description

technical field [0001] The invention relates to a sprue cap for high-nitrogen composite ceramic aluminum alloy casting used for metallurgical casting. Background technique [0002] The sprue cap is an interface provided on the upper part of the casting cavity for pouring the metal liquid. There are many types of ceramics that can be used in the sprue cap for aluminum alloy casting, usually a combination of non-metallic materials, which form a structure with a certain structural shape after batching and sintering. According to different raw materials, mixing ratios and different firing processes, the properties of the formed products are quite different, especially when used in special occasions, there are corresponding requirements for the performance of ceramics. [0003] Among the existing ceramics, there are ceramic products directly made of silicon carbide materials, but the performance of ceramic products made of a single material cannot meet the actual needs, so it ne...

Claims

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Application Information

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IPC IPC(8): B22C9/08C04B35/46C04B35/582
Inventor 徐涛李鑫
Owner LIAONING YIFEI TECH
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