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Aluminum oxide based nano complex phase ceramic bull block and method for preparing same

A technology of multiphase ceramics and wire drawing dies, applied in the direction of wire drawing dies, etc., can solve the problems of producing ceramic wire drawing dies without using superplastic forming technology, etc., and achieves improved material utilization, high toughness and surface finish, and good comprehensive mechanical properties. Effect

Active Publication Date: 2008-10-22
ZHENJIANG NAISI ADVANCE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the prior art, alumina-based nanocomposite ceramics have not been used to prepare wire drawing dies, nor have superplastic forming technology been used to produce ceramic wire drawing dies

Method used

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  • Aluminum oxide based nano complex phase ceramic bull block and method for preparing same
  • Aluminum oxide based nano complex phase ceramic bull block and method for preparing same
  • Aluminum oxide based nano complex phase ceramic bull block and method for preparing same

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Embodiment 1

[0027] This embodiment provides an alumina-based nanocomposite ceramic wire drawing die and a preparation method thereof. Using commercially available Al 2 o 3 , ZrO 2 (3Y) and MgO nano-powder, the ratio of which meets the sintered composition of the sintered body obtained by Al 2 o 3 : ZrO 2 (3Y):MgAl 2 o 4 =60:20:20, the proportions are all molar ratios, and the three powders are mixed evenly in proportion to obtain the alumina-based composite powder. The obtained composite powder was sintered by vacuum hot pressing in a ZRY-55 vacuum hot pressing sintering furnace. During the sintering process, high-strength graphite was used as the mold material. The sintering temperature was 1500 ° C, the sintering pressure was 25 MPa, and the holding time of hot pressing sintering was 60 minutes. That is, a cylindrical nanocomposite ceramic sintered body is obtained as a ceramic blank (3) for preparing a wire drawing die.

[0028] The superplastic extrusion forming process provid...

Embodiment 2

[0030] This embodiment provides an alumina-based nanocomposite ceramic wire drawing die and a preparation method thereof. Using commercially available Al 2 o 3 , ZrO 2 (3Y) and MgO nano-powder, the ratio of which satisfies the composition of the sintered body after sintering is Al 2 o 3 : ZrO 2 (3Y):MgAl 2 o 4 =80:10:10, and the proportioning ratios are all molar ratios. The three powders are uniformly mixed in proportion, and then dried and ground to obtain an alumina-based nanocomposite powder. The obtained composite powder was subjected to cold isostatic pressing treatment in a cold isostatic pressing machine, the pressure of the isostatic pressing treatment was 200MPa, and the holding time was 5min; then it was sintered without pressure in a box furnace at a sintering temperature of 1550°C. The holding time is 60min. That is, a cylindrical nanocomposite ceramic sintered body is obtained as a ceramic blank for preparing a wire drawing die.

[0031] as attached fi...

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Abstract

The invention discloses an alumina base nanometer complex phase ceramics die and a preparation method thereof. The alumina base nanometer complex phase ceramics is adopted to prepare the die, the matrix component of the nanometer complex phase ceramics die is Al2O3, and a second phase is ZrO2(3Y) and MgAl2O4. The preparation method of the nanometer complex phase ceramics die is that an alumina base nanometer complex phase ceramics sintered body of a certain shape is first obtained as the stock for preparing the die; then the hole shape of the die is formed by the method of superplastic pressing; after a slight accurate grinding process, the alumina base nanometer complex phase ceramics die is obtained. The alumina base nanometer complex phase ceramics die has the advantages of good mechanical property, a slight amount of machining and being suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of ceramic wire drawing die manufacture, and mainly relates to an alumina-based nano-composite ceramic wire drawing die and a preparation method thereof. Background technique [0002] As a key component in the metal wire drawing forming process, the wire drawing die is a typical consumable part. Commonly used metal wire drawing dies are mostly made of cemented carbide powder or ceramic powder by sintering. The production process is: powder mixing-green blank forming-high temperature sintering-grinding. Because the sintered material is extremely difficult to process, the final grinding process takes a lot of time and consumes a lot of tools, which makes the cost of high-quality wire drawing dies remain high. In addition, the temperature of the die mouth part rises rapidly during the wire drawing forming process, and the service environment is harsh, so the wire drawing die wears out quickly and fails, and pr...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622B21C3/02
Inventor 陈国清姜涛
Owner ZHENJIANG NAISI ADVANCE MATERIALS
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