Preparation method of complex CVD (chemical vapor deposition) diamond cutter

A diamond tool and diamond thick film technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve the problems of difficult processing of CVD diamond tools, low processing efficiency, high processing cost, and the probability of cracking The effect of lowering, high mold utilization rate, and lowering production cost

Active Publication Date: 2012-08-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex CVD diamond tool processing is very difficult, processing efficiency is very low, and processing c

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  • Preparation method of complex CVD (chemical vapor deposition) diamond cutter
  • Preparation method of complex CVD (chemical vapor deposition) diamond cutter

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] like figure 1 shown.

[0031] A preparation method of a complex CVD diamond thick film cutter, which comprises the following steps:

[0032] Substrate preparation: choose materials that are easy to process and suitable for diamond deposition and growth, such as Si or Mo, as the substrate 1, and control the thickness of the substrate t≥5mm. Both sides of the substrate are ground first, and then deposited on one of the surfaces with a thickness greater than 5 μm Co and Al are materials whose melting point is higher than 1500°C and diamond is not easy to nucleate and grow 2 o 3 Or one of Fe is used as the barrier film 2, and the deposition method of the barrier film 2 can be sputtering, ion plating, chemical vapor deposition, etc.;

[0033] Mold processing: On the side of the substrate 1 with the barrier film 2, a concave mold cavity 3 consi...

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Abstract

The invention relates to a preparation method of a complex CVD (chemical vapor deposition) diamond cutter. The preparation method is characterized by comprising seven steps, namely (1) preparation of a base material; (2) mold processing; (3) pretreatment of a mold cavity; (4) deposition; (5) mold stripping; (6) destressing; and (7) welding. According to the preparation method disclosed by the invention, a material which is easy to process is taken as a mold, and a CVD diamond thick film blade in a complex shape is deposited in the mold cavity, so that forming, grinding and polishing processing of a complex geometric surface of a cutting part of the diamond cutter can be avoided. According to the preparation method disclosed by the invention, the forming of the CVD diamond thick film blade with high precision and complex shape can be realized, and the complex CVD diamond cutter can be obtained by vacuum brazing. The method has the advantages of simplicity, easiness in realization and capability of greatly reducing the manufacturing cost of the complex diamond thick film cutter.

Description

technical field [0001] The invention relates to a method for preparing a superhard cutting tool, in particular to a method for preparing a superhard cutting tool with a complex cutting edge shape, in particular to a method for preparing a complex CVD diamond thick film cutting tool. Background technique [0002] Chemical vapor deposition (CVD) diamond does not contain metal or non-metal additives, and its purity is very high. It is considered to be the most ideal for processing non-ferrous metals and their alloys, metal composite materials, ceramics, carbon fibers, glass fiber products, hard alloys, stones, etc. tool material. CVD diamond thick film tool is a tool made by cutting a diamond thick film with a thickness of more than 0.1mm into small pieces and welding it on the tool holder. At present, CVD diamond thick film tools have entered the practical stage, and some countries in the United States, Japan and Europe have already sold products on the market. Some domestic...

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Application Information

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IPC IPC(8): B23P15/28C23C16/27
Inventor 卢文壮于守鑫薛海鹏左敦稳孙达飞王浩孙玉利徐锋张林王品付
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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