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Casting method of ceramic/metal integrated part on basis of layering extrusion forming

A technology of extrusion molding and ceramics, applied in the direction of ceramic molding machines, manufacturing tools, additive processing, etc., can solve the problems of complex preparation process, sintering process, and process of thermal barrier coatings, and achieve improved interface bonding, The effect of improving preparation efficiency and simple process

Active Publication Date: 2019-10-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent document CN107127340 A discloses a rapid prototyping method for metal-ceramic parts. The cost of metal, ceramic powder and photosensitive resin used in this method is relatively high, and the material composition and post-sintering process are relatively complicated.
Patent document CN103917502 B discloses a high-temperature thermal barrier coating applied in gas turbine technology, which is deposited on the surface of components by thermal spraying. The preparation process of thermal barrier coating is complicated and the cost is high
In addition, the patent document CN 105814280 B discloses a thermal barrier coating for turbine rotor blades and stator blades, which uses zirconia (YSZ) as the raw material and uses selective laser melting technology to achieve ceramic coating on the blades. Thermal barrier coating The preparation process of the layer is complicated and the cost is high
[0004] Although the above method can prepare parts that meet different needs, the preparation efficiency is low, the thickness of the ceramic layer is thin (≤0.5mm), the cost is high, the service life is short, and the process is complicated

Method used

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  • Casting method of ceramic/metal integrated part on basis of layering extrusion forming
  • Casting method of ceramic/metal integrated part on basis of layering extrusion forming
  • Casting method of ceramic/metal integrated part on basis of layering extrusion forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Design the 3D model of the double-layer ceramic shell and the internal channel according to the shape of the original blade, use the slicing software to slice the 3D model layered in the Z direction, and obtain the layered processing instructions, the needle diameter is 0.05mm, and the printing layer height is 0.04mm;

[0048] (2) Prepare three uniformly dispersed ceramic slurries, and then add them to the printing barrel at a printing speed of 10mm / s, and use a layered extrusion molding device to prepare the ceramic shell, inner shell and ceramic core filled in the internal channel as a whole ;

[0049] (3) Drying, degreasing, sintering and post-processing the printed ceramic shell and ceramic core body;

[0050] (4) After preheating the ceramic shell and the ceramic core, the filling and injection of the liquid metal is completed in a vacuum environment;

[0051] (5) After the molten metal is cooled, the ceramic core is removed in water, and the metal / ceramic int...

Embodiment 2

[0054] (1) Design the 3D model of the double-layer ceramic shell and the internal channel according to the shape of the original blade, use the slicing software to slice the 3D model layered in the Z direction, and obtain the layered processing instructions, the needle diameter is 0.3mm, and the printing layer height is 0.24mm;

[0055] (2) Prepare the uniformly dispersed ceramic slurry in 3, and then add it to the printing barrel at a printing speed of 40mm / s, and prepare the ceramic shell, inner shell and ceramic core body by using a layered extrusion molding machine;

[0056] (3) Drying, degreasing, sintering and post-processing the printed ceramic shell and ceramic core body;

[0057] (4) After preheating the ceramic shell and the ceramic core, the filling and injection of the liquid metal is completed in a vacuum environment;

[0058] (5) After the molten metal is cooled, the ceramic core is removed in water, and the ceramic / metal integrated blade is obtained after drying...

Embodiment 3

[0061] (1) Design the 3D model of the double-layer ceramic shell and the internal channel according to the shape of the original blade, use the slicing software to slice the 3D model layered in the Z direction, and obtain the layered processing instructions, the needle diameter is 0.2mm, and the printing layer height is 0.16mm;

[0062] (2) Prepare the uniformly dispersed ceramic slurry in 3, and then add it to the printing barrel at a printing speed of 25mm / s, and prepare the ceramic shell, inner shell and ceramic core body by using a layered extrusion molding machine;

[0063] (3) Drying, degreasing, sintering and post-processing the printed ceramic shell and ceramic core body;

[0064] (4) After preheating the ceramic shell and the ceramic core, the filling and injection of the liquid metal is completed in a vacuum environment;

[0065] (5) After the molten metal is cooled, the ceramic core is removed in water, and the ceramic / metal integrated blade is obtained after drying...

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Abstract

The invention belongs to the field of rapid casting and discloses a casting method of a ceramic / metal integrated part on the basis of layering extrusion forming. The method comprises the steps that 1,the three-dimensional structure of a ceramic shell and the three-dimensional structure of a ceramic core are designed according to the shape of the part; 2, a multi-ceramic-material and multi-head layering deposition forming method is adopted, and precision overall forming of multi-ceramic-material layer gradient structure shell is achieved; 3, blanks of the ceramic shell and the ceramic core aresubjected to drying, degreasing, sintering and after-treatment; 4, the treated ceramic shell and the ceramic core are preheated, and molten metal filling is completed through vacuum precise casting;and 5, after molten metal is cooled completely, the ceramic core is removed, an internal hole channel of the metal and ceramic part is formed, and the ceramic / metal integrated part is obtained. According to the method, by means of the layering extrusion forming method, double-layer or three-layer ceramic shells with different thicknesses and compactness degrees can be prepared, the vacuum precisecasting technology is combined, filling of the molten metal is completed, and precise casting forming of the ceramic / metal integrated part is achieved.

Description

technical field [0001] The invention belongs to the field of rapid casting, and more specifically relates to a casting method of ceramic / metal integrated parts based on layered extrusion. Background technique [0002] With the rapid development of aerospace, automotive and other industries, the temperature of some parts is getting higher and higher, and the use environment is becoming more and more complex, which puts forward more stringent requirements on the performance of these parts. For example, the blades of aviation turbine engines are developing in the direction of high thrust-to-weight ratio, high efficiency, low fuel consumption and long life. fracture. At present, metal-ceramic composite materials and ceramic coatings are mainly used to improve the high temperature resistance, corrosion resistance and oxidation resistance of parts. [0003] Patent document CN107127340 A discloses a rapid prototyping method for cermet parts. The cost of metal, ceramic powder and ...

Claims

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Application Information

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IPC IPC(8): B28B1/00B22D19/00B33Y10/00
CPCB22D19/00B28B1/001B33Y10/00
Inventor 樊自田杨力唐世艳李关晋钱磊蒋文明刘鑫旺
Owner HUAZHONG UNIV OF SCI & TECH
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