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Machinability of Hastelloy C-276 using Hot-pressed sintered Ti(C7N3)-based cermet cutting tools
Chinese Journal of Mechanical Engineering volume 28, pages 599–606 (2015)
Abstract
C-276 nickel-based alloy is a difficult-to-cut material. In high-speed machining of Hastelloy C-276, notching is a prominent failure mode due to high mechanical properties of work piece, which results in the short tool life and low productivity. In this paper, a newly developed Ti(C7N3)-based cermet insert manufactured by a hot-pressing method is used to machine the C-276 nickel-based alloy, and its cutting performances are studied. Based on orthogonal experiment method, the influence of cutting parameters on tool life, material removal rates and surface roughness are investigated. Experimental research results indicate that the optimal cutting condition is a cutting speed of 50 m/min, depth of cut of 0.4 mm and feed rate of 0.15 mm/r if the tool life and material removal rates are considered comprehensively. In this case, the tool life is 32 min and material removal rates are 3000 mm3/min, which is appropriate to the rough machining. If the tool life and surface roughness are considered, the better cutting condition is a cutting speed of 75 m/min, depth of cut of 0.6 mm and feed rate of 0.1 mm/r. In this case, the surface roughness is 0.59μm. Notch wear, flank wear, chipping at the tool nose, built-up edge(BUE) and micro-cracks are found when Ti(C7N3)-based cermet insert turned Hastelloy C-276. Oxidation, adhesive, abrasive and diffusion are the wear mechanisms, which can be investigated by the observations of scanning electron microscope and energy-dispersive spectroscopy. This research will help to guide studies on the evaluation of machining parameters to further advance the productivity of nickel based alloy Hastelloy C-276 machining.
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Supported by Program for New Century Excellent Talents in University of China (Grant No. NCET-13-0357), Shandong Provincial Natural Science Foundation of China (Grant No. ZR2014EEM026), and Tai Shan Scholar Foundation of China
ZOU Bin, born in 1978, is currently an associate professor at Shandong University, China. He received his PhD degree from Shandong University, China, in 2006. His research interests include high-efficiency machining and ceramic tools.
XU Kaitao, born in 1990, is currently a master candidate at Centre for Advanced Jet Engineering Technologies (CaJET), Shandong University, China.
HUANG Chuanzhen, born in 1966, is currently a professor at Shandong University, China. He received his PhD degree from Zhejiang University, China, in 1994. His main research interests include high-efficiency machining, ceramic materials, precision and ultra-precision machining, abrasive water jet machining.
YAO Yang, born in 1991, is currently a master candidate at Centre for Advanced Jet Engineering Technologies (CaJET), Shandong University, China.
ZHOU Huijun, born in 1986, is a master at Centre for Advanced Jet Engineering Technologies (CaJET), Shandong University, China.
LIU Zhanqiang, born in 1969, is currently a professor at Shandong University, China. He received his PhD degree from Zhejiang University, China, in 1999. His main research interests include high-efficiency machining, high-speed machining and micro machining.
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Xu, K., Zou, B., Huang, C. et al. Machinability of Hastelloy C-276 using Hot-pressed sintered Ti(C7N3)-based cermet cutting tools. Chin. J. Mech. Eng. 28, 599–606 (2015). https://doi.org/10.3901/CJME.2015.0316.031
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DOI: https://doi.org/10.3901/CJME.2015.0316.031