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Ceramic blast nozzle and preparing method thereof

A technology of sandblasting nozzles and ceramics, applied in the direction of spray guns, manufacturing tools, metal processing equipment, etc., can solve the problem of no gradient function effect and so on

Inactive Publication Date: 2005-02-23
SHANDONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The English literature "Wear" (1995, 118-183: 148-155) reported that B 4 C ceramic sandblasting nozzle, which is prepared by hot pressing sintering process, the components of the material are uniformly distributed, and there is no gradient function effect; the Chinese literature "China Ship Repair" (1997, (5): 37~38) reported 2 o 3 Ceramic sandblasting nozzle, which is prepared by pressureless sintering process, the components of the material are also uniformly distributed, and there is no gradient function effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment one: with Al 2 o 3 As the matrix, the raw materials are weighed according to the mass percentages of the strengthening phase (W, Ti) and C content: 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, and 70%, and the configuration 9 kinds of Al with different (W, Ti)C content 2 o 3 +(W, Ti)C ceramic composite powder; then intensified ball milling, using ethanol as medium, ball milling time 150 hours; ball milled Al 2 o 3 +(W, Ti)C ceramic composite powder was placed in a vacuum drying oven to dry, and after drying, it was sieved in a cabinet with a nitrogen-protected atmosphere; the dried 9 kinds of Al with different (W, Ti)C contents 2 o 3 +(W, Ti)C ceramic composite powders were respectively loaded into graphite molds; nitrogen was used as the sintering atmosphere, and gradient function ceramic sandblasting nozzles were prepared by hot pressing sintering process. The sintering temperature was 1700 ° C, the pressure was 30 MPa, and the holding time was 8 min. .

Embodiment 2

[0016] Embodiment two: with Al 2 o 3 As the matrix, according to the strengthening phase (W, Ti) C content: 30%, 40%, 50%, 60%, 70% by mass percentage to weigh the raw materials, configure 5 kinds of Al with different (W, Ti) C content 2 o 3 +(W, Ti)C ceramic composite powder; then intensified ball milling, using ethanol as medium, ball milling time 100 hours; ball milled Al 2 o 3 +(W, Ti)C ceramic composite powder was placed in a vacuum drying oven to dry, and after drying, it was sieved in a cabinet with a nitrogen-protected atmosphere; five kinds of dried Al with different (W, Ti)C contents 2 o 3 +(W, Ti)C ceramic composite powders were respectively loaded into graphite molds; nitrogen was used as the sintering atmosphere, and the gradient function ceramic sandblasting nozzle was prepared by hot pressing sintering process. The sintering temperature was 1750°C, the pressure was 36MPa, and the holding time was 18min. .

[0017] The gradient functional ceramic sandblasti...

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PUM

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Abstract

A ceramic blast nozzle is produced by: using Al2O3 as basic material and (W, Ti) C solid solution as strengthening phase in thermal pressed sinteing process. It is gradient functional nozzle with multi-layered structure and gradient distribution of constituents. The content of the solid solution is reduced from inlet to outlet. Its mechanical performance is varied as the gradient distribution of constituents is regulated. The residual press stress at its inlet makes tension stress, which is caused by external loads, to be balanced. Through test, it is verified that the nozzle has more wear-resistant, longer service life, so that it can be widely used for surface treatment in machine building, petroleum, chemical, automobile, ship-building, metallurgical industries.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, in particular to a ceramic sandblasting nozzle and a preparation method thereof. Background technique [0002] Sandblasting nozzle is a key component of various surface treatment equipment. Sandblasting nozzles require high hardness and wear resistance, as well as certain strength and toughness. During the working process of the sandblasting nozzle, the abrasive impact angle on the inlet of the sandblasting nozzle is close to 90°, which belongs to high-angle erosion; while the abrasive impact angle on the outlet and inner wall of the sandblasting nozzle is about 20-30°, which belongs to low-angle erosion. Corner erosion. Since the maximum erosion wear rate of ceramic materials occurs at a high erosion angle (90°), and the existing ceramic sandblasting nozzles at home and abroad are all homogeneous materials, the erosion wear rate of the entrance of the ceramic sandblasting nozzl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C5/04C04B35/10C04B35/56C04B35/626
Inventor 邓建新刘莉莉丁明伟艾兴
Owner SHANDONG UNIV
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