Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Al23O27N5-combined corundum composite slide plate and preparation method thereof

An al23o27n5, corundum-based technology, applied in the field of refractory materials, can solve problems such as reducing production costs, and achieve the effects of reducing production costs, excellent physical performance indicators, and high chemical stability

Inactive Publication Date: 2014-12-10
UNIV OF SCI & TECH BEIJING
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to prepare a kind of Al without immersion oil 23 o 27 N 5 The combined corundum composite slide plate not only overcomes the problem of carburization and carbon oxidation of molten steel by existing slide plate materials, but also simplifies the production process and greatly reduces the production cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A kind of Al 23 O 27 N 5 The preparation method of the combined corundum composite sliding plate, in terms of weight percentage, the raw material composition is: 81% corundum, 15% activated alumina, 4% metal aluminum powder, and 3% thermosetting phenolic resin.

[0019] During production, the various raw materials are weighed according to the proportion, mixed evenly, and then mixed to obtain mud, and then pressed into a shape by a friction press, first dried at 120-600℃ for 12h, and then at 120-600℃ under nitrogen conditions High-temperature sintering for 9 hours; hoop, grinding and coating to make the product of the present invention.

[0020] The powder is metal Al powder with a particle size of less than 325 mesh, activated alumina and part of corundum, and the aggregate is corundum with a particle size of 3-1 mm and 1-0.1 mm; the above-mentioned corundum is divided into plate-shaped corundum and white corundum.

[0021] The performance indicators of the obtaine...

Embodiment 2

[0022] Example 2: The production process is the same as that of Example 1, except that:

[0023] In terms of weight percentage, the raw material composition is: 72% corundum, 20% activated alumina, 7% metal aluminum powder, 1% graphite, plus 3% thermosetting phenolic resin. The performance indicators of the obtained product are: apparent porosity 8.3%, bulk density 3.18g / cm 3 , Compressive strength at room temperature is 243MPa, and high temperature flexural strength is 47MPa. Its thermal shock resistance, erosion resistance and slag penetration resistance are all good.

Embodiment 3

[0024] Example 3: The production process is the same as that of Example 1, except that:

[0025] In terms of weight percentage, the raw material composition is: 63% corundum, 25% activated alumina, 10% metal aluminum powder, 2% graphite, plus 3% thermosetting phenolic resin. The performance indicators of the obtained product are: apparent porosity 10.7%, bulk density 3.09g / cm 3 , Compressive strength at normal temperature is 269MPa, and high temperature flexural strength is 53MPa. Its thermal shock resistance, erosion resistance and slag penetration resistance are all good.

[0026] Attached 1

[0027] 1. 10.5Al 2 O 3 (s) + 4.5C(s) +2Al(l) + 2.5N 2 (g) = Al 23 O 27 N 5 (s)+ 4.5CO(g)

[0028] When ΔG=688348-455.874T T≥1510K, ΔG≤0;

[0029] 2. 10Al 2 O 3 (s) + 3C(s) + 3Al(l) + 2.5N 2 (g) = Al 23 O 27 N 5 (s) + 3CO(g)

[0030] ΔG=18498-165.599T When T≥112K, ΔG≤0

[0031] 3. 9.5Al 2 O 3 (s) + 1.5C(s) + 4Al(l) + 2.5N 2 (g) = Al 23 O 27 N 5 (s) + 1.5CO(g)

[0032] When ΔG=-651352+124.676T T≤5...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses an Al23O27N5-combined corundum composite slide plate and a preparation method thereof, belonging to the field of a refractory material. The slide plate consists of the following raw materials in percentage by weight: 55-85% of corundum, 5-30% of activated aluminum oxide, 1-15% of metal Al and 0-3% of carbon black and graphite; and phenolic resin accounting for 2-6% of the total weight of the raw materials is added as a bonding agent. The preparation method comprises the following steps of: weighing the raw materials according to the proportions, and mixing uniformly; mixing to obtain pug; performing compression moulding; drying at 120-600 DEG C for 5-25 hours; and then sintering in a nitriding atmosphere at 1,200-1,600 DEG C for 5-25 hours. The apparent porosity of the product disclosed by the invention is 4-13%, the volume density is 3.0-3.4g / cm<3>, the cold crushing strength is 150-280MPa, and the high temperature bending strength is 20-55MPa. The Al23O27N5-combined corundum composite slide plate has good erosion resistance and thermal shock resistance and low cost; the main components of the raw materials have high chemical stability and low oxygen potential; and secondary pollution caused by C, O, H and other impurities is avoided in clean steel continuous casting.

Description

technical field [0001] The invention relates to the preparation of a sliding plate for steelmaking and continuous casting, in particular to an Al alloy for clean steel continuous casting. 23 o 27 N 5 A combined corundum composite sliding plate and a preparation method thereof belong to the field of refractory materials. Background technique [0002] At present, the mainstream products of skateboards in modern iron and steel enterprises are aluminum-carbon and aluminum-zirconium-carbon skateboards, and the production process requires an oil immersion process. In recent years, clean steel has been developed rapidly. Conventional aluminum-carbon and aluminum-zirconium carbon slides cannot meet the needs of clean steel continuous casting due to the addition of carbon to molten steel. In addition, aluminum carbon and aluminum zirconium carbon slides have the problem of carbon oxidation during use. Carbon oxidation causes the structure of the slide to be loose, allowing oxides ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 李勇张军杰
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com