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A kind of al2o3-zro2 raw material for 3d printing and the process of producing high thermal shock resistance and special-shaped products

A product and raw material powder technology, which is applied in the direction of manufacturing tools, additive processing, ceramic molding machines, etc., can solve the problems of high production cost, low pass rate, and difficult molding, and achieve low production cost, high yield, and printing speed fast effect

Active Publication Date: 2019-01-25
RUITAI MATERIALS TECHNOLOGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape of the thin slab submerged nozzle is flat duckbill, the thickness of the nozzle wall is only about 1cm, and the thickness of the pipe wall is different at different positions, often accompanied by a composite structure. It is very difficult to form this special type of product. Compression molding process, high production cost, and low pass rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Add 80wt% of α-Al 2 O 3 Powder, 12wt% ZrO 2 Powder, 3wt% β-Si 3 N 4 Powder, 2wt% Si powder, 1wt% CeO 2 Powder, 1.5wt% MgAl 2 O 4 Powder, 0.5wt% polycarboxylic acid.

[0013] (2) Add water to mix, wet grinding to d 90 It is 1.5μm, dried to obtain mixed powder.

[0014] (3) The obtained mixed powder and acrylate are strongly mixed and milled at a ratio of 20:1 to obtain ceramic raw material powder for 3D printing.

[0015] (4) The ceramic raw material powder is printed with a 3D printer, and the molding parameters are: the molding temperature is in the range of 135±5℃, and the pressure is in the range of 3±0.5MPa to form the required special-shaped refractory products.

[0016] (5) Curing the special-shaped products in the ultraviolet box for 1 hour.

[0017] (6) The cured special-shaped products are sintered at 1600°C for 5 hours to obtain high-erosion resistance, high thermal shock resistance, and special-shaped refractory products.

[0018] The special-shaped functional refra...

Embodiment 2

[0020] (1) Add 90wt% of α-Al 2 O 3 Powder, 5wt% ZrO 2 Powder, 2wt% β-Si 3 N 4 Powder, 1wt% Si powder, 0.5wt% CeO 2 Powder, 1wt% MgAl 2 O 4 Powder, 0.5wt% polycarboxylic acid.

[0021] (2) Add water to mix, wet grinding to d 90 2μm, dried to obtain mixed powder.

[0022] (3) The obtained mixed powder and acrylate are strongly mixed and milled at a ratio of 25:1 to obtain ceramic raw material powder for 3D printing.

[0023] (4) The ceramic raw material powder is printed with a 3D printer, and the molding parameters are: the molding temperature is in the range of 145±5°C, and the pressure is in the range of 5±0.5MPa to form the required special-shaped refractory products.

[0024] (5) Curing the special-shaped products for 1.5h in the ultraviolet box.

[0025] (6) The cured special-shaped product is sintered at 1600°C for 8 hours to obtain a high corrosion resistance, high thermal shock resistance, and special-shaped refractory product.

[0026] The special-shaped functional refractory mat...

Embodiment 3

[0028] (1) Add 85wt% of α-Al 2 O 3 Powder, 7wt% ZrO 2 Powder, 4wt% β-Si 3 N 4 Powder, 1wt% Si powder, 1wt% CeO 2 Powder, 1.8wt% MgAl 2 O 4 Powder, 0.2wt% polycarboxylic acid.

[0029] (2) Add water to mix, wet grinding to d 90 It is 1μm, dried to obtain mixed powder.

[0030] (3) The obtained mixed powder and acrylate are strongly mixed and milled at a ratio of 25:1 to obtain ceramic raw material powder for 3D printing.

[0031] (4) The ceramic raw material powder is printed with a 3D printer, and the molding parameters are: the molding temperature is in the range of 180±5°C, and the pressure is in the range of 7±0.5MPa to form the required special-shaped refractory product.

[0032] (5) Curing the special-shaped products in the ultraviolet box for 2 hours.

[0033] (6) The cured special-shaped products are sintered at 1600°C for 5 hours to obtain high-erosion resistance, high thermal shock resistance, and special-shaped refractory products.

[0034] The special-shaped functional refract...

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PUM

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Abstract

The invention relates to a product which is prepared by employing an Al2O3-ZrO2 ceramic raw material power and 3D printing and a production technology of the product, and the product highly resists corrosion, highly resists thermal shock and is a special-shaped refractory material. The Al2O3-ZrO2 ceramic raw material power is prepared according to the following steps: mixing alpha-Al2O3 powder, ZrO2 powder, beta-Si3N4 powder, Si powder, CeO2 powder, MgAl2O4 powder and polycarboxylic acid powder, adding water and performing wet grinding until d90 is 1-2 mu m, and drying to obtain a mixed powder, and then mixing the mixed powder and an acrylate and vigorously grinding to obtain the ceramic raw material powder for 3D printing. The special-shaped refractory material product is printed by using a 3D printer, the molding temperature is 130-190 DEG C, the pressure is 2-8 MPa, and ultraviolet curing and sintering are employed for preparing the product. The production technology possesses the advantages that the production technology does not need isostatic pressing or postprocessing, is applicable to production of clean steel, does not pollute super-clean ultra-low carbon steel, and is applicable to functional parts of fields of refractory materials with continuous casting function, super-clean ultra-low carbon steel and the like.

Description

Technical field [0001] The present invention relates to the use of Al 2 O 3 -ZrO 2 The ceramic raw material powder adopts 3D printing to produce products with high corrosion resistance, high thermal shock resistance, and special-shaped refractory materials and its production process. It belongs to the technical field of inorganic non-metallic refractory materials. The advantage of this process is that refractory products have high corrosion resistance and high thermal shock resistance performance, especially suitable for special-shaped refractory products, without isostatic pressing and post-processing, no pollution to ultra-clean ultra-low carbon steel, and suitable for continuous casting Functional parts in the fields of functional refractories, ultra-clean ultra-low carbon steel, etc. Background technique [0002] The thin slab immersion nozzle is a refractory casing for continuous casting installed at the bottom of the intermediate tank in the continuous steel casting equipme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622C04B35/634B33Y70/00B28B1/00B28B11/24
CPCB28B1/001B28B11/243B33Y70/00C04B35/106C04B35/622C04B35/63424C04B2235/3229C04B2235/3882C04B2235/428C04B2235/44C04B2235/94C04B2235/9607C04B2235/9669
Inventor 陈松林袁林魏瀚王俊涛刘锡俊陈雪峰胡建辉胡建坤刘士范蒋正跃
Owner RUITAI MATERIALS TECHNOLOGY CO LTD