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Boron nitride multiphase ceramic side sealing plate for thin-strip casting and preparing method thereof

A multiphase ceramic and boron nitride technology, which is applied in the field of ceramic side sealing plates and their preparation, can solve the problems affecting the high temperature service performance of the boron nitride multiphase ceramic side sealing plates, and achieves good molten steel erosion performance and excellent comprehensive mechanics. performance, good resistance

Active Publication Date: 2016-01-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims to solve the technical problem that the residue of the low melting point phase affects the high temperature service performance of the boron nitride composite ceramic side seal plate, and provides a boron nitride composite phase ceramic side seal plate for thin strip continuous casting and its preparation method

Method used

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specific Embodiment approach 1

[0019] Specific Embodiment 1: In this embodiment, the boron nitride composite ceramic side seal plate for thin strip continuous casting is composed of 60 to 80 parts by weight of boron nitride, 5 to 25 parts of fused zirconia, and 5 parts by weight. ~15 parts of silicon carbide, 5~10 parts of boron-containing compound and 5~10 parts of alkaline earth metal oxide;

[0020] The boron-containing compound is diboron trioxide, boric acid, metaboric acid or hydrate of diboron trioxide.

[0021] The alkaline earth metal oxide is beryllium oxide, magnesium oxide, calcium oxide, strontium oxide or barium oxide.

[0022] The preparation method of the boron nitride composite ceramic side sealing plate for thin strip continuous casting is carried out according to the following steps:

[0023] 1. Weigh 60-80 parts by weight of boron nitride, 5-25 parts of fused zirconia, 5-15 parts of silicon carbide, 5-10 parts of boron-containing compounds and 5 parts ~10 parts of alkaline earth metal ...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the dispersion medium in step 2 is alcohol, absolute ethanol or ethanol aqueous solution with an ethanol content of 55% to 95%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the atmosphere conditions of the first stage and the second stage in Step 3 are all vacuum conditions, and the degree of vacuum is less than 20Pa. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a boron nitride multiphase ceramic side sealing plate for thin-strip casting and a preparing method thereof and relates to a ceramic side sealing plate and a preparing method thereof. The technical problem that residues of low-melting-point phases influence high-temperature service performance of the boron nitride multiphase ceramic side sealing plate is solved. The boron nitride multiphase ceramic side sealing plate for thin-strip casting is prepared from boron nitride, electric-melting zirconium oxide, silicon carbide, a boron-containing compound and alkaline-earth metal oxide. The method comprises the steps that the raw materials are weighed; the raw materials are dispersed, dried and sieved to obtain composite powder mixed uniformly; the composite powder is placed into a die and sintered in a two-section hot pressing mode to obtain the side sealing plate. The compactness of the prepared boron nitride multiphase ceramic side sealing plate for thin-strip casting can be over 97%, a bending resistance value can be 250-350 MPa, and no obvious softening phenomenon occurs in the high-temperature mechanical performance tests; under the temperature difference of 800 DEG C, thermal shock tests of more than ten times are carried out repeatedly, and no thermal shock rupture phenomenon is found out. The method belongs to the field of preparing the ceramic side sealing plate.

Description

technical field [0001] The invention relates to a ceramic side sealing plate and a preparation method thereof. Background technique [0002] As a new type of thin strip steel production process, steel thin strip continuous casting technology has the advantages of reducing equipment investment, simplifying production procedures, reducing product costs, improving yield, rationally utilizing limited resources and optimizing production configuration compared with traditional hot rolling processes. Such outstanding advantages have become an important part of the technological innovation of modern iron and steel enterprises, and have attracted widespread attention from domestic and foreign iron and steel companies. However, thin strip continuous casting technology is mostly in the research stage at home and abroad, and a series of key technologies related to it have yet to be broken through. Among them, side sealing technology is one of the bottlenecks restricting the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/583C04B35/622C04B35/66
Inventor 陈磊王玉金魏博鑫贾德昌周玉
Owner HARBIN INST OF TECH
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