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High temperature titanium alloy precision casting method based on rapid prototyping

A high-temperature titanium alloy and precision casting technology, applied in the field of casting, can solve the problems of complex high-temperature titanium alloy parts, difficult to obtain shape, complicated preparation process, etc., and achieve the effects of good high temperature resistance performance, high utilization rate and simple preparation process

Inactive Publication Date: 2010-08-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex preparation process, high cost and difficulty in obtaining high-temperature titanium alloy parts with complex shapes in the existing method, and to provide a high-temperature titanium alloy precision casting method based on rapid prototyping

Method used

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The high-temperature titanium alloy precision casting method based on rapid prototyping in this embodiment is carried out according to the following steps: 1. Rapid mold making to obtain a wax film; The back layer of the layer is the shell, wherein the surface coating is composed of zirconium acetate and yttrium oxide powder in a mass ratio of 2~2.6:1, and the back layer is composed of silica sol and coal gangue powder in a mass ratio of 1.1~1.8:1. Composition; 3. The shell in step 1 is roasted at 850-1100°C for 0.5-2h; 4. The shell roasted in step 3 is put into a centrifugal titanium casting machine, and then the titanium alloy is melted and poured into the shell Perform centrifugal casting and cool to room temperature to obtain titanium alloy castings; 4. After shell cleaning, sandblasting, annealing and finishing, the titanium alloy castings are subjected to hot isostatic pressing at a temperature of 850~1150°C and a hot isostatic pressure of 10...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment is different from Embodiment 1 in that: in step 1, the wax film surface is coated with 1 layer of surface layer and 7 layers of back layer. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, the wax film surface is coated with 2 layers of surface layer and 5 layers of back layer. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention relates to a high temperature titanium alloy precision casting method based on a rapid prototyping and relates to a casting method. The high temperature titanium alloy precision casting method solves the problems that the preparation technology is complex, the cost is high and a high temperature titanium alloy part with a complex shape is difficult to obtain in the existing method. The method comprising the following steps: 1, rapidly make mould to obtain a cere; 2, make a shell mold; 3, roast; 4, pour a high temperature titanium alloy casting; 5, post treat, the high temperature titanium alloy casting is obtained after cleaning shell, spraying sand, annealing, finishing and pressure maintaining. The preparation technology of the invention is simple, the cost is low, the design is flexible, thereby being capable of volume production, and the high temperature titanium alloy part with the complex shape can be obtained.

Description

technical field [0001] The invention relates to a casting method. Background technique [0002] Due to the high service temperature, high temperature strength, good oxidation resistance, creep resistance and fatigue resistance of high temperature titanium alloy, it has obvious advantages in the new generation of high temperature structural materials used in aircraft engines and rocket propulsion systems. It has attracted the attention of material workers in the aerospace industry, and has become one of the research directions and development trends of a new generation of high-temperature structural materials. With the further development of the aviation industry, titanium alloys will be used more and more in aircraft. It is mostly used in the manufacture of important parts and aircraft body structures that require high strength and good heat resistance in aero-engines. [0003] The middle casing fan frame of a large and complex engine in the United States has been made of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/00C22F1/18
Inventor 陈玉勇孔凡涛赵而团肖树龙田竟
Owner HARBIN INST OF TECH
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