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Radial gradient ceramic blast nozzle

A technique of radial gradient, sandblasting nozzles, applied in the direction of spray guns, manufacturing tools, abrasives

Inactive Publication Date: 2006-12-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent "application number: 200410024228.0" reported Al 2 o 3 / (W,Ti)C gradient ceramic nozzle, the ceramic sandblasting nozzle only has an axial gradient distribution of components at the entrance of the sandblasting nozzle, which can only improve the ability of the ceramic sandblasting nozzle to resist erosion and wear at the entrance

Method used

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  • Radial gradient ceramic blast nozzle

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Example 1: Taking SiC as the matrix, weighing the raw materials according to the content of solid solution (W, Ti)C respectively: 20%, 35%, and 50% by mass, and configuring 3 kinds of SiC+( with different (W, Ti)C content W, Ti) C ceramic composite powder; then separately strengthened ball milling, using ethanol as the medium, the ball milling time is 200 hours; the ball milled SiC+(W, Ti) C ceramic composite powder is placed in a vacuum drying oven to dry, after drying, in Sieving in a cabinet with a nitrogen atmosphere; 3 kinds of dried SiC+(W,Ti)C ceramic composite powders with different contents of (W,Ti)C are respectively loaded into graphite molds, according to (W,Ti)C The content of solid solution gradually increases from the surface of the inner hole of the blast nozzle to the outer wall of the blast nozzle, and the graphite mold is charged in the order. Nitrogen is used as the sintering atmosphere, and a hot-press sintering process is used to prepare a radial 3-lay...

Embodiment 2

[0017] Example 2: As described in Example 1, the difference is that 4 types of (W, Ti) C content are configured as follows: 20%, 30%, 40%, 50% SiC+(W, Ti)C ceramic composite powder . The hot-pressing sintering process is used to prepare radial 4-layer gradient ceramic sandblasting nozzles. The sintering temperature is 1950°C, the pressure is 30 MPa, and the holding time is 50 min.

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Abstract

The invention relates to a radial gradient ceramic sandblast nozzle prepared by hot-pressing sintering process with SiC as matrix and (W, Ti)C solid solution as hardening constituent, which belongs to the field of advanced production technology. The radial gradient ceramic sandblast nozzle is multilayer structure, and the components change gradually along nozzle radial direction, that is: the content of (W, Ti)C solid solution increases gradually from the inner hole surface of sandblast nozzle to the external wall of sandblast nozzle. Because the radial gradient change of components in ceramic sandblast nozzle, residual compressive stress forms on the surface of inner hole, so that the stress on the surface of the inner hole is relieved, erosion-proof and wearable performance is improved, and service life is prolonged.

Description

Technical field [0001] The invention belongs to the field of advanced manufacturing technology and relates to a radial gradient ceramic sandblasting nozzle, which is particularly suitable for sandblasting surface treatment. Background technique [0002] Sandblasting nozzle is a key component of various surface treatment equipment. Sandblasting nozzles are required to have high hardness and wear resistance, and have certain strength and toughness. Ceramic materials are ideal materials for nozzle preparation due to their high hardness and wear resistance. In the working process of the ceramic sandblasting nozzle, the surface of the inner hole of the sandblasting nozzle is subjected to severe abrasive impact, resulting in a large erosion stress on the surface of the inner hole, resulting in serious erosion and abrasion of the inner hole surface of the ceramic sandblasting nozzle. The service life of the ceramic sandblasting nozzle is improved. [0003] The English literature "Wear" ...

Claims

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Application Information

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IPC IPC(8): B24C5/04C04B35/56C04B35/565C04B35/622
Inventor 邓建新刘莉莉丁明伟
Owner SHANDONG UNIV
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