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Preparation method for CBN (Cubic Boron Nitride) coated cutter based on micrometer/nanometer diamond transition layer

A technology of nano-diamond and cubic boron nitride, which is applied in the coating process of metal materials, coating, superimposed layer plating, etc., can solve the problems of poor bonding between the coating and the hard alloy substrate, and improve the bonding performance , easy operation and simple equipment

Active Publication Date: 2012-07-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Aiming at the problem of poor bonding performance between the coating and the cemented carbide substrate, a method of depositing cubic boron nitride coating using micro / nano diamond as a transition layer was invented

Method used

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  • Preparation method for CBN (Cubic Boron Nitride) coated cutter based on micrometer/nanometer diamond transition layer
  • Preparation method for CBN (Cubic Boron Nitride) coated cutter based on micrometer/nanometer diamond transition layer
  • Preparation method for CBN (Cubic Boron Nitride) coated cutter based on micrometer/nanometer diamond transition layer

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Substrate pretreatment: use WC-Co 6% (YG6) cemented carbide blade as the substrate material, place the blade in acetone solution and ultrasonically clean it for 10 minutes to remove surface oil, and then use K 3 Fe(CN) 6 :KOH:H 2 O The solution mixed with the optimal mass ratio of 1:1:10 was ultrasonicated for 20 minutes to achieve the purpose of etching the WC component on the surface, and then a mixture of 65% nitric acid and 36% hydrochloric acid with a volume ratio of 1:3 was used. Soak in the solution for 5 minutes to etch the Co element on the surface, and finally use the diamond micropowder suspension to ultrasonically grind for 20 minutes, wash with deionized water, and dry it for use;

[0030] (2) Tantalum wire pretreatment: Straighten and tighten the tantalum wire and fix it on the substrate, and then carbonize for 30min at a carbon source concentration of 3%. After carbonization, raise the deposition table so that the distance between the substrate and ...

Embodiment 2

[0035] (1) Substrate pretreatment: use WC-Co 6% (YG6) cemented carbide blade as the substrate material, put the blade in acetone solution and ultrasonically clean it for 8 minutes to remove surface oil, and then use K 3 Fe(CN) 6 :KOH:H 2 O The solution mixed with the optimal mass ratio of 1:1.2:12 was ultrasonicated for 25 minutes to achieve the purpose of etching the WC component on the surface, and then the mixed solution with a concentration of 65% nitric acid and 36% hydrochloric acid in a volume ratio of 1:4 Soak in the solution for 6 minutes to etch the Co element on the surface layer, and finally use the diamond micropowder suspension to ultrasonically grind for 25 minutes, wash with deionized water, and dry it for use;

[0036] (2) Tantalum wire pretreatment: Straighten and tighten the tantalum wire and fix it on the substrate, and then carbonize for 35min at a carbon source concentration of 2%. After carbonization, raise the deposition table so that the distance bet...

Embodiment 3

[0041] (1) Substrate pretreatment: use WC-Co 6% (YG6) cemented carbide blade as the substrate material, put the blade in acetone solution and ultrasonically clean it for 15 minutes to remove surface oil, and then use K 3 Fe(CN) 6 :KOH:H 2 O The solution mixed with the optimal mass ratio of 1:0.8:8 was ultrasonicated for 15 minutes to achieve the purpose of etching the WC component on the surface, and then the mixed solution with a concentration of 65% nitric acid and 36% hydrochloric acid in a volume ratio of 1:2 Soak in the solution for 7 minutes to etch the Co element on the surface layer, and finally use the diamond micropowder suspension to ultrasonically grind for 15 minutes, wash with deionized water, and dry it for use;

[0042] (2) Tantalum wire pretreatment: the tantalum wire was straightened and fixed on the substrate, and then carbonized for 25 min at a carbon source concentration of 4%. After carbonization, raise the deposition table so that the distance between ...

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Abstract

A preparation method for a CBN (Cubic Boron Nitride) coated cutter based a on micrometer / nanometer diamond transition layer comprises the main steps as follows: pretreating a hard alloy substrate; pretreating tantalum wires; putting the substrate into heat wire method chemical vapor deposition equipment, and respectively depositing micrometer diamond and nanometer diamond by changing technological parameters; placing a deposited film in radio-frequency magnetron sputtering equipment and conducting pre-sputtering treatment on the film through Ar ions; and depositing a CBN coating in Ar and N2 gas atmosphere by taking hBN as a target material and the micrometer / nanometer diamond as a transition layer. The invention has the advantages that the technology and the equipment are simple, the operation is easier, and the combination of a coating and the substrate is improved remarkably.

Description

technical field [0001] The invention relates to a preparation technology of a superhard material film, especially a preparation method of a cubic boron nitride coating tool, specifically a method of depositing a cubic boron nitride coating tool using radio frequency magnetron sputtering with micro / nano diamond as a transition layer. A method for preparing a boron nitride tool coating. Background technique [0002] As we all know, cubic boron nitride (cBN) is second only to diamond in terms of hardness and thermal conductivity, and has excellent thermal stability. It does not undergo oxidation reaction below 1300°C in the atmosphere, and begins to hexagonal nitride at 1550°C in vacuum. Boron (hBN) transformation, does not react with iron-based metals below 1150°C, combined with cBN's excellent wear resistance and extremely small friction coefficient, makes cBN an ideal tool for processing steel materials, especially suitable for processing various hardened steels , chilled s...

Claims

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Application Information

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IPC IPC(8): C23C28/04C23C16/46C23C16/27C23C14/35C23C14/06
Inventor 徐锋左敦稳户海峰张旭辉徐俊华龚潺张骋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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