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Method for producing oxide ceramic shell capable of improving TiAl alloy casting surface performances

A technology of oxide ceramics and surface properties, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., and can solve the problems of insufficient oxidation resistance of TiAl alloy high-temperature surfaces

Inactive Publication Date: 2013-01-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the shortcoming of insufficient oxidation resistance of the high temperature surface of TiAl alloy, and provides a method for preparing an oxide ceramic shell to improve the surface performance of TiAl alloy castings

Method used

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  • Method for producing oxide ceramic shell capable of improving TiAl alloy casting surface performances
  • Method for producing oxide ceramic shell capable of improving TiAl alloy casting surface performances

Examples

Experimental program
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specific Embodiment approach 1

[0015] One: Preparation of surface coating: Add defoamer and wetting agent to the binder at a stirring speed of 100-300r / min, and then according to the volume ratio of the oxide powder to the binder ( 2.0~3.8) g: 1mL Add oxide powder to the binder, stir while adding, and prepare a coating after mixing, and then at a stirring speed of 100~200r / min, according to the oxide powder in the coating and the addition The material mass ratio is (0.1~20): 100. Add additional materials to the paint, stir evenly and let stand to complete the preparation of the surface coating; wherein, the binder is zirconium sol, and the defoamer is positive Octanol, the wetting agent is fatty alcohol polyoxyethylene ether JFC, the mass ratio of the defoamer to the binding agent is (0.01~0.5): 100, the mass ratio of the wetting agent to the binding agent (0.01-0.5): 100, the oxide powder is zirconia or yttrium oxide, the particle size is 270-320 mesh, and the additive material is one or a combination of s...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and the specific embodiment 1 is: in step 1, stir evenly and then let stand for 8-12 hours. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the viscosity of the surface coating in step 1 is 80-90s. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A method for producing an oxide ceramic shell capable of improving TiAl alloy casting surface performances relates to a method for producing an oxide ceramic shell. The invention aims to solve the defect that a TiAl alloy casting surface does not have enough oxidation resistance, and provides the method for producing the oxide ceramic shell capable of improving the TiAl alloy casting surface performances. The method comprises: 1. surface layer coating production; 2. surface layer shell production; 3. adjacent surface layer shell production; 4. back layer shell production; and 5. shell dewaxing and calcinating, so that the production of the oxide ceramic shell capable of improving the TiAl alloy casting surface performances is completed. The method is applied to the field of producing the oxide ceramic shell capable of improving the TiAl alloy casting surface performances.

Description

technical field [0001] The invention relates to a method for preparing an oxide ceramic shell. Background technique [0002] Due to its many advantages, TiAl alloy is regarded as a new type of high-temperature structural material with great potential, and has broad application prospects in aerospace and automotive fields, such as gas turbine blades, engine exhaust valves, compressor impellers, engine Cases, diffusers and gas turbine covers, etc. However, there are still many difficult problems to be solved in practical application of TiAl alloy. For example, its components are subjected to strong oxidation under high temperature due to high-temperature and high-speed airflow passing through them in most working conditions. Therefore, the oxidation resistance of TiAl alloy at high temperature is one of the key factors to determine the service life of working parts. [0003] In recent years, scholars at home and abroad have used various methods to study the oxidation resista...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C1/00B22C1/18B22C3/00
Inventor 肖树龙徐丽娟田竟贾燚陈玉勇
Owner HARBIN INST OF TECH
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