Results 211 to 220 of about 3,378 (250)
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Hard Turning with PCBN Tooling
1999Material removal, at economic rates, from hardened workpieces has always presented a challenge and, until quite recently, abrasive machining processes were the only option for hard-facings. However, cutting tools based on polycrystalline cubic boron nitride (PCBN) have opened up the possibility of turning and milling as attractive alternatives for ...
E. J. Brookes, R. D. James, X. Ren
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High-Reliability Cutting with New PCBN Tools4
SAE Technical Paper Series, 1999<div class="section abstract"><div class="htmlview paragraph">(PCBN)Polycrystalline cubic boron nitride cutting tools have been widely used for hard turning of cutting ferrous materials such as hardened steels. In high-speed interrupted cutting, however, despite their high potential to increase productivity, they have not been ...
Satoru Kukino +3 more
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Fracture Properties of PCBN as a Function of Loading Rate
Key Engineering Materials, 2009Polycrystalline Cubic Boron Nitride (PCBN) is a superhard material which is used in machining of hardened steels and other abrasive and aerospace grade alloys. In these applications the tools are subjected to high operating temperatures, abrasive and impact loading. Impact loading can lead to the sudden fracture and hence failure of the tool.
Declan Carolan +3 more
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Reconstruction and Analysis of Wear Topography of PcBN Abrasive Grain
Key Engineering Materials, 2013This paper mainly deals with the reconstruction and fractal analysis of wear topography of brazed polycrystalline cubic boron nitride (PcBN) grain in grinding process. On the basis of fractal analysis, the uncertainty in shape and complexity in wear mechanism are analyzed by means of the construction of micro fracture of PcBN grain after producing the ...
Qing Miao +4 more
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Microstructure and Mechanical Properties of High Density PCBN Aggregates
Key Engineering Materials, 2008Polycrystalline 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, 2007PCBN 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 +2 more
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Mechanical Properties of the PcBN-Alcomposites are Improved by Pressure Infiltration
Advanced Materials Research, 2015PcBN–Al composites（PAC）have been synthesized by pressure infiltration(PI) and a general mixing method(GM)[1-3] with a wide grain sizes range of 4-25 um and a wide temperature range of 1200-1600°C at 5.0 GPa,respectively.Hardness ranged between 30and 40 GPa, while the flank wear (Vb) reached 0.12mm when it finished 4000m in cutting test ofPAC ...
Wen Rui Duan +5 more
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Performance Investigation for Precision Mold Turning by PCBN Tool
Advanced Materials Research, 2009In order to ascertain the superior characteristics of PCBN tool for hardened material machining, to promote the cutting performance and efficiency of a mold manufacturing, to investigate the wear mechanism of the cutting tool, and to investigate the dimensional accuracy and surface finish of the machined molds, SKD11 die steel and the polycrystalline ...
Shen Yung Lin +3 more
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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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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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2018
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???????????????????? ???????? ????????????-?????????????????? ?????????????????????? ???????????????????????? ?????????????????? ?????????????? ????????, ???????????????????? ?? ?????????????? cBN, ?????????????????????????? ?? ?????????????????? ???????????????????????? hBN: ?????????????????? HV ?????? ???????????????????????? ???? ???????????????? 2?
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