Since the successful preparation of pure CBN coatings by Inagawa et al in 1987, the research boom of CBN hard coatings has been launched internationally. The methods for low pressure gas phase synthesis of CBN coatings are mainly CVD and PVD methods. CVD includes chemical transport PCVD, hot wire assisted heating PCVD, ECR-CVD, etc.; PVD has reactive ion beam plating, active reactive evaporation, laser evaporation ion beam assisted deposition, and the like. The research results show that the progress has been made in the synthesis of CBN phase, good adhesion to cemented carbide matrix and suitable hardness. At present, the maximum amount of cubic boron nitride deposited on cemented carbide is only 0.2-0.5μm. In order to achieve commercialization, reliable technology must be used to deposit high-purity and economical CBN coatings with a thickness of 3 to 5 μm, which is confirmed in actual metal cutting. Previous page Suzhou Newstar Hardware Co.,Ltd. is a professional Tool Set cabinet manufacture located in Suzhou China, nearby Shanghai Port, with very good price and convenient traffic of shipping. We are various kinds of tools kit, including Tool Kit chest, tool kit cabinet, Tool Cabinet kit etc, and also we have small package list tools kit box and tools set bag. We warm welcome your visit and hope to be your long time partner. Tool Set Cabinet,Tool Kit Chest,Tool Kit Cabinet,Tool Cabinet Kit SUZHOU NEWSTAR HARDWARE CO.,LTD. , https://www.sjnewstarhardware.com
3.CNx coating
In the 1980s, American scientists Liu and Cohen designed a new β-C3N4 compound like β-Si3N4. Using solid physics and quantum chemistry theory, it was calculated that its hardness might reach diamond, which attracted the attention of scientists all over the world. Synthetic carbon nitride has become a hot topic in the world of materials science. Fujimoto of Okayama University in Japan used electron beam evaporation ion beam assisted deposition to obtain a carbon nitride coating of 63.7 Gpa. The hardness of carbon nitride synthesized by Wuhan University reached 50GPa, and it was deposited on high-speed steel twist drill to obtain very good drilling performance. The main methods for synthesizing carbon nitride include true flow and RF reactive sputtering, laser evaporation and ion beam assisted deposition ECR-CVD, and dual ion beam deposition.