Ceramic part and production method thereof

A technology of ceramic parts and production technology, applied in the field of ceramic parts and its production technology, can solve the problems of difficult processing methods, poor product performance, waste of raw materials, etc., and achieve simple and easy control of the degreasing process, small thermal expansion coefficient, hardness and chemical resistance The effect of corrosion

Pending Publication Date: 2017-07-25
深圳市星迪伟业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For complex structures and precision ceramic parts, machining and grinding are usually used to obtain them, but there are many processes, low production efficiency, waste of raw materials and energy.
Moreover, for some parts with complex shapes, such as steps, acute angles, blind holes and other structures, ordinary processing methods are more difficult, and the product performance is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: a kind of production technology of ceramic part, comprises the steps:

[0051] (1) Mixing and granulation: Put the ceramic powder into the kneader and heat it to 100°C, keep it warm for 0.5h, then add the binder, knead for 2h, and then granulate on the extruder to obtain the feed;

[0052] (2) Injection molding: Put the feed material in the injection molding machine, and then inject it into the mold under the conditions of the cylinder temperature of 120°C, the sandblasting nozzle temperature of 100°C, and the injection pressure of 20MPa for injection molding to obtain the injection blank ;

[0053] (3) Degreasing: Place the injection billet in an air furnace for thermal degreasing. In an air atmosphere, raise the temperature from room temperature to 160 °C at a heating rate of 0.4 °C / min, keep it warm for 0.5 h, and then heat it at a heating rate of 0.5 °C / min. Heat it to 360°C for 0.5h, then heat it to 480°C at a rate of 1°C / min, then heat it for 1.5h; ...

Embodiment 2

[0072] Embodiment 2: a kind of production technology of ceramic part, comprises the steps:

[0073] (1) Mixing and granulation: Put the ceramic powder into the mixer and heat it to 12°C, keep it warm for 0.8h, then add the binder, knead for 3h, and then granulate on the extruder to obtain the feed;

[0074] (2) Injection molding: Put the feed material in the injection molding machine, and then inject it into the mold under the conditions of the cylinder temperature of 160°C, the sandblasting nozzle temperature of 140°C, and the injection pressure of 50MPa for injection molding to obtain the injection blank ;

[0075] (3) Degreasing: Place the injection billet in an air furnace for thermal degreasing. In an air atmosphere, raise the temperature from room temperature to 170 °C at a heating rate of 0.5 °C / min, keep it warm for 0.8 hours, and then heat it at a heating rate of 0.6 °C / min. Heat at 370°C for 0.8h, then heat at 490°C at a rate of 1.2°C / min and hold for 1.8h; then hea...

Embodiment 3

[0093] Embodiment 3: a kind of production technology of ceramic part, comprises the steps:

[0094] (1) Mixing and granulation: Put the ceramic powder into the mixer and heat it to 150°C, keep it warm for 1 hour, then add the binder, mix it for 4 hours, and then granulate it on the extruder to obtain the feed;

[0095] (2) Injection molding: put the feed material in the injection molding machine, and then inject it into the mold under the conditions of the cylinder temperature of 180°C, the sandblasting nozzle temperature of 180°C, and the injection pressure of 100MPa for injection molding to obtain the injection blank ;

[0096] (3) Degreasing: Place the injection billet in an air furnace for thermal degreasing. In an air atmosphere, raise the temperature from room temperature to 180 °C at a heating rate of 0.5 °C / min, keep it warm for 1 hour, and then heat it at a heating rate of 0.6 °C / min to After holding at 380°C for 1 hour, then heating at a rate of 1.5°C / min to 500°C a...

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Abstract

The invention relates to the technical field of powder metallurgy and particularly relates to a ceramic part and a production method thereof. The production method comprises (1) mixing granulation: putting ceramic powder into a mixer, heating the ceramic powder, adding a binder into the ceramic powder, carrying out mixing, and carrying out granulation through an extruder to obtain feed, (2) injection molding: placing the feed in an injection molding machine and carrying out injection molding to obtain an injected blank, (3) degreasing: placing the injected blank into an air furnace, carrying out hot degreasing, carrying out heating pre-sintering, carrying out furnace cooling and taking out a blank, and (4) sintering: putting the blank in a sintering furnace, carrying out sintering, and carrying out grinding and polishing to obtain a ceramic part. Through powder injection molding process and final degreasing and high temperature sintering, a fine ceramic part having a complex shape is obtained, the product has high compactness and good uniformity and is obtained by one step molding, the operation and control are simple, product quality is stable, production efficiency is high, a production cost is low and large-scale industrial production is realized.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a ceramic part and a production process thereof. Background technique [0002] Ceramics are widely used in precision bearings, seals, gas turbine rotors, nozzles, heat exchanger components and nuclear reactor materials. However, since ceramics are compounds with strong covalent bonds and have the characteristics of high strength and high hardness, it is difficult to prepare parts with complex shapes, which limits its further application. Therefore, if complex ceramic parts can be prepared, the application range of ceramics can be greatly expanded. [0003] Powder injection molding technology is a molding method that injects the mixture of metal or ceramic powder and binder into the mold cavity. It combines mature modern polymer injection molding and powder metallurgy technology, and has a one-time molding It has the advantages of producing complex-shaped workpieces, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/48C04B35/505C04B35/583C04B35/565C04B35/632C04B35/634C04B35/638B28B1/24B28B11/24B28B11/00
CPCC04B35/10C04B35/48C04B35/505C04B35/565C04B35/583C04B35/632C04B35/63404C04B35/6346C04B35/638B28B1/24B28B11/00B28B11/243C04B2235/6567C04B2235/6562C04B2235/6022
Inventor 徐小明孔德华李继坪高博何国耀
Owner 深圳市星迪伟业科技有限公司
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