Boron nitride composite ceramic side seal plate for thin strip continuous casting and preparation method thereof

A technology of composite ceramics and boron nitride, which is applied in the field of ceramic side seals and its preparation, can solve problems affecting the high-temperature service performance of boron nitride composite ceramic side seals, and achieve good corrosion resistance of molten steel and good friction and wear Compatibility, good resistance to

Active Publication Date: 2017-10-03
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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Experimental program
Comparison scheme
Effect test

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 discloses a boron nitride composite phase ceramic side sealing plate for thin strip continuous casting and a preparation method thereof, which relates to a ceramic side sealing plate and a preparation method thereof. The invention aims to solve the technical problem that the residual low-melting point phase affects the high-temperature service performance of the boron nitride composite ceramic side sealing plate. The boron nitride composite ceramic side seal plate for thin strip continuous casting is composed of boron nitride, fused zirconia, silicon carbide, boron-containing compounds and alkaline earth metal oxides; method: 1. Weigh the raw materials; 2. Disperse and dry , and sieved to obtain a uniformly mixed composite powder; 3. Put the composite powder into a mold and perform two-stage hot-pressing sintering to obtain the product. The density of the prepared boron nitride composite ceramic side seal plate for thin strip continuous casting can reach more than 97%, and its bending strength can reach 250-350MPa, and there is no obvious softening phenomenon in the high-temperature mechanical performance test. The thermal shock test was repeated more than ten times under the temperature difference of 800°C, and no thermal shock fracture was found. The invention belongs to the field of preparation of ceramic side sealing plates.

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 Patents(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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