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Water-based lost foam casting coating with porous zeolite modified by titania film for magnesium alloy casting and preparation method thereof

A technology of porous zeolite and magnesium alloy, which is applied in casting molding equipment, metal processing equipment, coating, etc., can solve the problems of unsatisfactory flame retardant effect, poor thermal conductivity of coating, high cavity temperature, etc., and achieve good adsorption and heat dissipation Stability, prevent sticky sand, good suspension effect

Inactive Publication Date: 2016-07-13
HUOQIU COUNTY XINRUI METAL PROD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

"Development of Magnesium Alloy Coatings for Lost Foam Casting with Quartz Powder" uses quartz powder and diatomite as refractory aggregates, sodium bentonite and CMC as suspending agents, and dextrin and silica sol as binders to prepare high-permeability coatings. Magnesium alloy lost foam coating with flame retardant effect, however, the thermal conductivity of the coating formed during the casting process of this coating is poor, resulting in high temperature in the cavity, unsatisfactory flame retardant effect, and a large amount of combustion and oxidation of magnesium metal leads to serious defects in castings

Method used

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Embodiment Construction

[0014] A water-based lost foam coating containing titanium-loaded porous zeolite for magnesium alloy casting, characterized in that the coating is made of the following raw materials in parts by weight: quartz powder 30, thermally conductive modified diatomite 10, hydroxypropyl methyl Cellulose 2, tetraethyl orthosilicate 2, dialdehyde starch 1, porous zeolite 8, zinc borate 0.1, sodium lignosulfonate 0.1, absolute ethanol 20, deionized water 30, dilute hydrochloric acid solution with a concentration of 15% 5 .

[0015] Wherein the thermally conductive modified diatomite is prepared by the following method:

[0016] (1) Firstly, the diatomite is crushed after removing impurities, passed through a 200-mesh sieve, and the sieved matter is used for later use;

[0017] (2) Mix aluminum isopropoxide with deionized water, heat the water bath to 80°C, and stir the solution ultrasonically for 2 hours. After the pH value of the solution no longer changes, add an appropriate amount of ...

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Abstract

The invention discloses a water-based lost foam casting coating with porous zeolite modified by a titania film for magnesium alloy casting.According to the lost foam casting coating, kieselguhr and quartz sand which are subjected to heat conductive modification are used as refractory aggregate, and meanwhile the porous zeolite modified by the titania film is added, so that the coating has the good adsorbability and heat stability, foam liquid can be effectively adsorbed in the casting process, the problem that sand adheres to a casting can be effectively prevented, the temperature inside a cavity can be adjusted, and magnesium alloy oxidative combustion is avoided.The prepared coating has the advantages of being good in suspension property, breathable, resistant to heat, good in heat conductivity and heat insulation and the like.A casting with the high surface smoothness can be obtained after the coating is adopted, and the quality of the magnesium alloy casting is effectively improved.

Description

technical field [0001] The invention relates to the technical field of lost foam casting coatings, in particular to a water-based lost foam coating containing titanium-loaded porous zeolite for magnesium alloy casting and a preparation method thereof. Background technique [0002] In recent years, magnesium alloys are gradually replacing part of iron and steel due to their excellent comprehensive properties, and have become more and more widely used materials, especially in the fields of automobiles and aviation, and lost foam casting magnesium alloy castings are also eye-catching The use of lost foam casting technology has the advantages of simple process, high casting dimensional accuracy, and small machining allowance. However, due to the low pouring temperature in the lost foam casting process of magnesium alloy castings, it is difficult to gasify the lost foam, and Most of the molds are in liquid state, and the magnesium metal is active, so it is easy to oxidize and bur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22C9/04
CPCB22C3/00B22C9/04
Inventor 黄学勇
Owner HUOQIU COUNTY XINRUI METAL PROD
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