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Zirconium acetate agglutinate yttrium oxide shuttering and method for producing the same

A technology of yttrium oxide and zirconium acetate, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve problems such as waste products, damage to casting quality, casting surface or inner layer pollution, etc., to achieve controllable process parameters and high smoothness Effect

Active Publication Date: 2009-05-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-temperature alloys and many metal functional materials contain more highly active metal elements such as Ti, Nb, and rare earth. When using traditional silica or alumina materials with silica sol as a binder as mold shells for precision casting or directional solidification , often due to highly reactive metals and SiO 2 The surface or inner layer of the casting will be polluted by the reaction, which will damage the quality of the casting or cause waste

Method used

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  • Zirconium acetate agglutinate yttrium oxide shuttering and method for producing the same
  • Zirconium acetate agglutinate yttrium oxide shuttering and method for producing the same
  • Zirconium acetate agglutinate yttrium oxide shuttering and method for producing the same

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Effect test

Embodiment 1

[0037] Zirconium acetate bonded yttrium oxide formwork for directionally solidified Ti-47Al-2Cr-2Nb alloy rods

[0038] The first step: prepare the formwork slurry

[0039] The composition of the mold shell slurry is: ammonium metatungstate, zirconium acetate, yttrium oxide powder, defoamer and surfactant, among which, the content of 325 mesh yttrium oxide powder accounts for 80% of the total weight of the slurry, and the content of ammonium metatungstate accounts for 3% of the total weight of the slurry, the content of zirconium acetate accounts for 16.85% of the total weight of the slurry, n-octanol accounts for 0.05% of the total weight of the slurry, and the content of OP-10 accounts for 0.1% of the total weight of the slurry.

[0040] Step Two: Prepare the Formwork

[0041] see figure 1 As shown, immerse the casting-shaped wax mold in the slurry prepared in the first step for 5 minutes and take it out. When the slurry is evenly coated on the wax mold and there is no mor...

Embodiment 2

[0053] Zirconium acetate bonded yttrium oxide formwork for precision casting Ti-6Al-4V rods

[0054] The first step: prepare the formwork slurry

[0055] The composition of the mold shell slurry is: ammonium metatungstate, zirconium acetate, yttrium oxide powder, defoamer and surfactant, among which, the content of 325 mesh yttrium oxide powder accounts for 60% of the total weight of the slurry, and the content of ammonium metatungstate accounts for 15% of the total weight of the slurry, the content of zirconium acetate accounts for 24.55% of the total weight of the slurry, the content of n-amyl alcohol accounts for 0.15% of the total weight of the slurry, and the content of JFC accounts for 0.3% of the total weight of the slurry.

[0056] Step Two: Prepare the Formwork

[0057] Dip the wax mold in the shape of a casting into the slurry prepared in the first step for 2 minutes and take it out. When the slurry is evenly coated on the wax mold and there is no more dripping of t...

Embodiment 3

[0069] Zirconium acetate bonded yttrium oxide formwork for precision casting Nb-16Si-22Ti-2Al-2Hf-2Cr rods

[0070] The first step: prepare the formwork slurry

[0071] The composition of the mold shell slurry is: ammonium metatungstate, zirconium acetate, yttrium oxide powder, defoamer and surfactant, among which, the content of 325 mesh yttrium oxide powder accounts for 70% of the total weight of the slurry, and the content of ammonium metatungstate accounts for 10% of the total weight of the slurry, the content of zirconium acetate accounts for 19.7% of the total weight of the slurry, the organic silicon resin (silicone) accounts for 0.1% of the total weight of the slurry, and the content of EA accounts for 0.2% of the total weight of the slurry.

[0072] Step Two: Prepare the Formwork

[0073] see figure 2 As shown, immerse the casting-shaped wax mold in the slurry prepared in the first step for 3 minutes and take it out. When the slurry is evenly coated on the wax mold...

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Abstract

The invention discloses a zirconium acetate bonded yttria formwork and a preparation method thereof. The formwork comprises the following compositions: 90.5 to 97 percent of yttria, 0.3 to 1.0 percent of tungsten, and the balance being zirconia. The service temperature of the formwork is between 1,000 and 2,000 DEG C, and the formwork is suitable for precise casting or directional solidification of high-activity metals and high-activity alloy of titanium, niobium and rare earth elements.

Description

technical field [0001] The present invention relates to a high-temperature precision casting and directional solidification appliance, more specifically, a zirconium acetate bonded yttrium oxide formwork capable of precision casting and directional solidification of metals or alloys in an environment of 1000-2000 °C , and a method for making the shell. Background technique [0002] Titanium alloy is an attractive and excellent structural material, which has the characteristics of low density, high specific strength and good corrosion resistance, and has been widely used in aviation and aerospace fields. Titanium alloy castings have their own unique advantages, especially investment precision castings, whose shape can be arbitrarily complex, and can be integrally formed with almost no margin or even no margin. However, titanium is an extremely active chemical element, and liquid titanium is compatible with almost all shapes. All materials have different degrees of chemical r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22C9/02B22D21/06
Inventor 张虎周琨高明唐晓霞
Owner BEIHANG UNIV