Results 181 to 190 of about 2,658 (198)

Microstructure and Mechanical Properties of High Density PCBN Aggregates

Key Engineering Materials, 2008
Polycrystalline cubic boron nitride (PCBN) is formed by sintering cubic boron nitride particles (cBN) at high temperature and high pressure. In this process, a network of cBN particles is formed by intergrowth and bridging between the particle phases.
X.J. Ren, Ming Zhi Wang
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New Pcbn for Heavy Interrupted Cutting of Hardened Steel

Materials Science Forum, 2007
PCBN tools are used worldwide for machining of hardened steel parts in automotive industries. Because cutting by PCBN tools has many advantages, which are high-precision, highefficiency, high-flexibility and low total machining cost, compared with conventional grinding methods. But in heavy interrupted cutting of hardened steel, the tool life is not so
Katsumi Okamura, Saturo Kukino, Tomohiro Fukaya   +2 more
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Optimizing PCBN cutting tool performance in hard turning

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2008
Surface finish, in addition to tool wear, is an important aspect of PCBN tool performance in hard turning. A set of experiments that focused on the effects of corner radius, chamfer angle/width, and edge radius in addition to severity of interruption and speed/feed at constant depth of cut were performed.
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Hard turning of GCr15 steel with chamfered PCBN tools

International Journal of Manufacturing Research, 2013
This work investigates the cutting performance of chamfered PCBN tools in hard turning of GCr15 bearing steel. Experimental study was performed on a NC lathe. Cutting forces were measured by using a dynamometer. Cutting temperature was measured by using an infrared thermal imager. The variation of cutting forces and cutting temperature with the chamfer
Tao Chen, Xianli Liu, Suyan Li
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Cryogenic PCBN turning of ceramic (Si 3 N 4 )

Wear, 1996
This paper presents a technique for machining advanced ceramics with liquid nitrogen (LN) cooled polycrystalline cubic boron nitride (PCBN) tool. A LN circulation system has been designed to control the cutting tool temperature. The tool wear of PCBN50 during the machining of the reaction bonded silicon nitride (Si3N4) reduced significantly with LN ...
Z.Y. Wang, K.P. Rajurkar, M. Murugappan
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Machining Abrasion-Resistant Hard-Facings with Pcbn Tools

2002
Iron-based hard-facings are a popular choice for abrasion resistant materials in industries as diverse as mining and food processing. Alloys forming chromium carbides dispersed in a relatively soft matrix are particularly effective because these carbides are usually present as relatively large micro-constituents, which present large surface areas to ...
E. J. Brookes, R. D. James, C. Shutt, C. J. Taylor   +3 more
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Wear Behaviour of PCBN, PCD, Binderless PCBN and Cemented Carbide Cutting Inserts When Machining Ti-6Al-4V in an Oxygen-Free Atmosphere

2020
One approach to overcome the difficulties in machining titanium can be the selection of a suitable cutting material. However, influences of the chemical tool wear under machining atmosphere has not been considered jet. In this work the tribochemical wear resistance of uncoated carbide tools, polycrystalline cubic boron nitride (PCBN) tools ...
F. Schaper, B. Denkena, M.-A. Dittrich, A. Krödel, J. Matthies, S. Worpenberg   +5 more
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???????? ?????????????????? pcbn ??? ?????????????? ?? ?????????????????????? ?????????????????? ?????????????????? ?????????????? ????????

2018
It is developed new PCBN ??? a two-layer composite of cubic boron nitride with a substrate of cemented carbide. Properties of a working layer a composite ??? high hardness, fracture strength and an electrical conductivity in a combination to necessary geometry sintered in HPA preparations, have provided manufacturing of complex contour profile the tool.
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Reducing Fracture Tendencies in PCBN FSW Tools

2009
Abstract : The overall goal of this program is to increase the life of PCBN tools in friction-stir welding of high temperature metals. This will be achieved through the following objectives: (1) Understand the fundamental causes for limited lifetimes of PCBN tools during Friction-Stir Welding (FSW) of high temperature metals, including both wear and ...
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???????????????????????? ?????????????????? ?? ???????????????????????????????? PCBN, ???????????????????? ???? ???????????????? cBN, ?????????????????????????????? ???? ?????????????????????? ?????????????????????????????? hBN

2018
???????????????????? ???????? ????????????-?????????????????? ?????????????????????? ???????????????????????? ?????????????????? ?????????????? ????????, ???????????????????? ?? ?????????????? cBN, ?????????????????????????? ?? ?????????????????? ???????????????????????? hBN: ?????????????????? HV ?????? ???????????????????????? ???? ???????????????? 2?
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