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Method for preparing surface molded shell cast by high-temperature titanium alloy melting mold

A high-temperature titanium alloy and investment casting technology, applied in casting and molding equipment and other directions, can solve the problems of easily polluted environment and high cost of mold shell, and achieve the effect of excellent performance and good compactness

Inactive Publication Date: 2010-08-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the mold shell prepared by the existing method is high in cost and easy to pollute the environment during dewaxing, and provides a method for preparing a surface layer mold shell for high-temperature titanium alloy investment casting

Method used

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  • Method for preparing surface molded shell cast by high-temperature titanium alloy melting mold

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specific Embodiment approach 1

[0009] Specific embodiment 1: The method for preparing the surface layer shell for high-temperature titanium alloy investment casting in this embodiment is carried out according to the following steps: 1. Preparation of mixed binder: SiO 2 The hydrolyzed solution obtained after colloid hydrolysis, the hydrolyzed solution is mixed with the zirconium acetate binder after standing for 20~28 hours, the mass ratio of the hydrolyzed solution to the zirconium acetate binder is 1:1~1.5, and then the mixture is added into the mixture The total mass of 3%~10% polyvinyl butyral is stirred and mixed for 10~20 minutes to obtain the mixed binder; 2. Preparation of the surface layer slurry: add to each kilogram of the mixed binder prepared in step 1 Add 0.5~1ml of wetting agent and 0.8~1.2ml of defoamer, and then add 2~4kg of 325-mesh refractory powder and stir and mix for 10~24 hours to obtain the surface layer slurry; Dip the angle into the slurry until the surface slurry of the coated wax...

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, SiO 2 After the colloid is hydrolyzed, let it stand for 22-26 hours. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment one is: in step one, SiO 2 After the colloid is hydrolyzed, let it stand for 24 hours. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a method for preparing a surface molded shell cast by a high-temperature titanium alloy melting mold, and relates to a method for preparing a surface molded shell. The method solves the problems that the molded shell prepared by the conventional method has high cost during de-waxing and easily pollutes the environment. The method comprises the following steps: 1, preparing mixed adhesive; 2, preparing surface slurry; 3, coating and hanging, scattering sand and drying to obtain the surface molded shell. The molded shell prepared by the method can be used for steam de-waxing, has low de-waxing cost, and is environmentally-friendly and easy to operate.

Description

technical field [0001] The invention relates to a method for preparing a surface shell. Background technique [0002] Due to its high service temperature, high temperature strength, good oxidation resistance, creep resistance, fatigue resistance, etc., high-temperature titanium alloys are favored in the new generation of high-temperature structural materials used in aircraft engines and rocket propulsion systems. The attention of material workers in the aerospace industry has become the research direction and development trend of a new generation of high-temperature structural materials. At present, high-temperature titanium alloys are mainly used in the manufacture of important parts and aircraft body structures that require high strength and good heat resistance in aero-engines, especially for aircraft with high Mach numbers. The key to how to obtain a high-temperature titanium alloy with good performance lies in the surface shell used in casting. Zirconium diacetate is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/04
Inventor 陈玉勇孔凡涛赵而团肖树龙
Owner HARBIN INST OF TECH
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