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Boron carbide base ceramic sand jet material

A boron carbide-based, sandblasting nozzle technology, applied in the direction of abrasives, spray guns, manufacturing tools, etc., can solve the problems of low strength and fracture toughness, easy brittle fracture, and low densification of sandblasting nozzles, and reduce the number of workers The effect of labor intensity, high degree of densification and short sintering time

Inactive Publication Date: 2006-07-12
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 The price of ceramic sandblasting nozzle is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Press B 4 C 50%, TiC 45%, metal molybdenum and nickel 5% are weighed raw materials (both volume ratio). The weight ratio of metal composition is: molybdenum 10%, nickel 90%. Mix the constituent materials according to the formula, put them into a ball mill tank made of stainless steel for ball milling, use YG8 cemented carbide balls, use absolute ethanol as the ball milling medium, and the ball milling time is 150 hours; the powder after ball milling is placed in a vacuum drying box Dry and sieve in a nitrogen stream after drying. The sieved mixed powder is cold-pressed in a steel mold, and then put into a graphite mold for hot-pressing and sintering. Flowing argon is used as the protective gas, the hot-pressing temperature is 1800°C, the hot-pressing pressure is 30MPa, and the hot-pressing holding time is 15min. B 4 C / TiC / Mo / Ni ceramic sandblasting nozzle. B prepared by the above process 4 The C-based ceramic sandblasting nozzle has a high degree of den...

Embodiment 2

[0013] Embodiment 2: As described in Embodiment 1, the difference is: press B 4 C 80%, TiC 18%, metal molybdenum and nickel 2%, weigh raw materials (both volume ratio). The ball milling time is 200 hours, the hot pressing temperature is 1900° C., the hot pressing pressure is 35 MPa, and the hot pressing holding time is 30 minutes.

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PUM

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Abstract

The invention relates to a ceramic sand blowing nozzle material, which takes boron carbide as basal body, titanium carbide as reinforced phase, at the same time, we add metal binding phase molybdenum and nickel to enhance the bond of material tissue. The degree of compactness of sand blowing nozzle produced by said material is high, whose strength and tenacity is greatly enhanced compared with pure boron carbide, burning temperature is deduced to less than 1900 Deg C from 2200 Deg C of pure boron carbide, and the burning time is greatly decreased, said material has excellent anti-scouring wear ability with long life duration.

Description

1. Technical field [0001] The present invention relates to a kind of boron carbide (B 4 C) Base ceramic material, especially suitable for making sandblasting nozzles. 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 sandblasting nozzles at home and abroad include metal, hard alloy and ceramics. Under the same conditions, the service life of steel sandblasting nozzles is far less than that of cemented carbide sandblasting nozzles, and the lifespan of cemented carbide sandblasting nozzles is not as good as that of ceramic sandblasting 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 strength and fracture toughness of C ceramic sandblasting nozzle are low, and brittle fracture is easy to occur in application, an...

Claims

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Application Information

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IPC IPC(8): C04B35/563B24C5/04
Inventor 邓建新孙军龙
Owner SHANDONG UNIV
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