A mold for superhard material synthesis

A technology of superhard materials and molds, which is applied in the field of molds and can solve problems such as unstable synthesis

Active Publication Date: 2016-08-17
信阳市德隆超硬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the currently commonly used methods in the synthesis process of superhard materials, especially diamond composite sheets and cubic boron nitride composite sheets, can easily cause synthesis instability, and provide a method that can ensure a more uniform pressure field in the synthesis chamber. , a mold for the synthesis of superhard materials with high synthesis stability

Method used

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  • A mold for superhard material synthesis
  • A mold for superhard material synthesis
  • A mold for superhard material synthesis

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Embodiment Construction

[0017] A mold for synthesizing superhard materials is made of the following raw materials: a low-melting substance with a melting point range of 800-1000°C, a high-melting point substance with a melting point range of 1000-1800°C, and dolomite. The low melting point substance is sodium chloride, and the high melting point substance is magnesium oxide and aluminum oxide. Substances with low melting point ensure a more uniform pressure field in the synthesis cavity, which greatly improves the stability of synthesis; substances with high melting point make the mold still have high strength at high temperatures, ensuring the stability of synthesis; dolomite will undergo special Phase change, the volume becomes larger, to a certain extent, it compensates for the pressure drop caused by the volume shrinkage of the material after sintering.

[0018] The parts by weight of the sodium chloride, magnesium oxide, aluminum oxide and dolomite are respectively 5-40 parts, 5-30 parts, 10-40 ...

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Abstract

The invention discloses a die for the synthesis of superhard materials, and particularly relates to a die used for taking a carbide chip or ceramic tip as a base material and sintering a base body and superhard materials through a sintering technology. The die aims to solve the technical problem that the currently common method for synthesizing superhard materials particularly diamond compact and cubic boron nitride compact has very high possibility of causing unstable synthesis during synthesis. The die is prepared through the following raw materials: low melting point materials with the melting point range being 800 to 1000 DEG C, high melting point materials with the melting point range being 1000 to 1800 DEG C, and materials having special phase change when the temperature is below 1300 to 1500 DEG C. The die can ensure that the pressure field in a synthesis cavity is more uniform, greatly improves the synthesis stability, ensures that the size can be increased at high temperature, compensates the pressure drop caused by volume shrinkage after material sintering, and provides more stable and uniform pressure filed of material synthesis.

Description

technical field [0001] The invention relates to a mold, in particular to a mold for sintering the base body and superhard material by using cemented carbide blades or cermet blades as base materials through a sintering process. Background technique [0002] Diamond and cubic boron nitride are the two hardest materials currently known, and blades made of these two materials have been widely used in the field of machining. In order to ensure the uniformity of the pressure field in the synthesis cavity during the synthesis of superhard materials, especially diamond composite sheets and cubic boron nitride composite sheets, the current common method is to add salt tubes and salt sheets in the cavity, but the salt sheet is at high temperature. Complete melting under the environment can easily lead to unstable synthesis. Contents of the invention [0003] The technical problem to be solved by the present invention is that the currently commonly used methods in the synthesis pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 刘书锋崔卫民
Owner 信阳市德隆超硬材料有限公司
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