Prepn process of sand blasting ceramic nozzle

A preparation process and a technology for sandblasting nozzles, applied in the field of ceramic sandblasting nozzle preparation technology, can solve the problems of easy occurrence of brittle fracture, long sintering time and high price of ceramic nozzles

Inactive Publication Date: 2003-03-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but pure B 4 The strength and fracture toughness of C ceramic sandblasting nozzle are low, brittle fracture is easy to occur in application, and the reliability is low
and B 4 The degree of densification of C ceramic materials is low, and the sintering temperature is as high as 2200°C, requiring the use of an ultra-high temperature sintering furnace, which takes a long sintering time and consumes a lot of energy, which leads to the use of pure B 4 C Ceramic nozzles are expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Press B 4 C40%, (W, Ti) C57%, Si3% by mass percent Weigh raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 120 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The ceramic sandblasting nozzle was prepared by hot pressing sintering method, the sintering temperature was 1820°C, the pressure was 36MPa, the holding time was 25min, and the nitrogen sintering atmosphere was used. B prepared by the above process 4 The C-based ceramic sandblasting nozzle has a high degree of densification, and its strength and toughness are higher than those of pure B 4 C ceramics are greatly improved, and the sintering temperature is changed from pure B 4 The 2200°C of C ceramics is reduced to 1820°C, and the sintering time is shortened, and the corrosion and wear resistance...

Embodiment 2

[0014] Example 2: press B 4 C58%, (W, Ti) C40%, Si2% by mass percent Weigh raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 150 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The ceramic sandblasting nozzle was prepared by hot pressing sintering method, the sintering temperature was 1850°C, the pressure was 36MPa, the holding time was 30min, and the sintering atmosphere was nitrogen. B prepared by the above process 4 The C-based ceramic sandblasting nozzle has a high degree of densification, and its strength and toughness are higher than those of pure B 4 C ceramics are greatly improved, and the sintering temperature is changed from pure B 4 The 2200°C of C ceramics is reduced to 1850°C, and the sintering time is shortened, and the corrosion and wear resistance of t...

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PUM

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Abstract

The preparation process of sand blasting ceramic nozzle includes adding (W, Ti)C solid solution into B4C substrate and small amount of Si sintering assistant and hot pressed sintering with in-situ chemical reaction between B4C and (W, Ti)C to produce B4C / TiB / W2B5. The B4C base sand-blasting ceramic nozzle produced through the said process has high compactness, strength and toughness high than those of B4C ceramic one, sintering temperature reduce to below 1900 deg.c, short sintering time and high erosion and wear resistance.

Description

1. Technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to a preparation process of a ceramic sandblasting nozzle. The ceramic sandblasting nozzle prepared by this process can be widely used in industries such as surface strengthening, surface cleaning, surface modification, abrasive spray cutting and the like. 2. Background technology [0002] Sandblasting nozzles require high hardness and wear resistance, as well as certain strength and toughness. At present, the materials for making nozzles at home and abroad include metal, hard alloy and ceramics. Under the same conditions, the life of steel nozzles is far less than that of carbide nozzles, and the life of cemented carbide nozzles is not as good as that of ceramic nozzles. Pure boron carbide (B 4 C) Because of its high hardness and wear resistance, ceramics are the first choice for the preparation of ceramic sandblasting nozzles. but pure B 4 The s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/622C04B35/645
Inventor 邓建新艾兴赵军李剑峰丁泽良
Owner SHANDONG UNIV
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