Preparation method of steel cord enhanced graphite silicon carbide crucible

A silicon carbide crucible and steel cord technology is applied in the preparation of steel cord reinforced graphite silicon carbide crucible, the preparation of high-performance special refractory ceramics and composite ceramic products, and can solve the problems of high price, cracking, low mechanical strength, etc. , to achieve the effect of improving the service life

Inactive Publication Date: 2014-06-25
嘉兴皓特特种陶瓷股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The existing graphite silicon carbide crucibles on the market are easy to be cracked by impact during the production process due to their low mechanical strength, or cracks are generated due to repeated thermal cycles. Material product

Method used

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  • Preparation method of steel cord enhanced graphite silicon carbide crucible
  • Preparation method of steel cord enhanced graphite silicon carbide crucible

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

[0023] As shown in the figure, the present invention selects a copper-coated steel cord of a certain specification, and the diameter of the steel cord is between 0.5 mm and 2.0 mm, with 1.55 mm being the best. The diameter of the steel cord should not be too thin, otherwise the breaking force will be reduced and the enhancement effect cannot be achieved. At the same time, the diameter of the steel cord should not be too thick, otherwise it will be separated from the ceramic substrate due to the large thermal expansion in the subsequent high-temperature sintering process. Tensile strength of steel cord>1500 N / mm 2 , the thickness of the copper plating layer is 0.1 to 0.6g / kg, with 0.25 being the best.

[0024] The steel cord is covered with an alloy coating by electroless plating. The alloy coating can be pure tungsten, chromium, molybdenum, or an alloy of...

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Abstract

The invention discloses a preparation method of a steel cord enhanced graphite silicon carbide crucible. The preparation method comprises the following steps: 1, selecting steel cords, then covering the steel cords with an alloy coating by a chemical plating method, and finally knitting the steel cords covered with the alloy coating to form a grid-shaped cage structure; 2, mixing graphite powder with silicon carbide particles according to a certain ratio to prepare a graphite silicon carbide mixture; 3, placing the prepared cage formed by knitting the steel cords into a deformable rubber mould and then filling the rubber mould with the graphite silicon carbide mixture prepared in the step 2; adjusting the position of the cage formed by knitting the steel cords; 4, placing the rubber mould into isostatic equipment, and pressing the graphite silicon carbide mixture and the cage formed by knitting the steel cords together by adopting an isostatic pressing method to form a crucible blank; and 5, sintering the prepared crucible blank at a high temperature.

Description

technical field [0001] The invention relates to the production field of refractory ceramic products, in particular to the preparation of high-performance special refractory ceramics and composite ceramic products, that is, a preparation method of a steel cord reinforced graphite silicon carbide crucible. Background technique [0002] In recent years, with the rapid development of the automobile industry and the aerospace industry, the aluminum alloy casting industry has gained a good space for development. Graphite silicon carbide crucible is used in the melting and heat preservation process of aluminum alloy casting. The existing graphite silicon carbide crucibles on the market are prone to cracking due to impact during the production process due to their low mechanical strength, or cracks due to repeated thermal cycles. material products. SUMMARY OF THE INVENTION [0003] The invention provides a preparation method of a steel cord reinforced graphite silicon carbide cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/76C04B35/52C04B35/565C04B35/622
Inventor 杨勇
Owner 嘉兴皓特特种陶瓷股份有限公司
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