Pulse electron beam assisted nitriding of TiC-(Ni-Cr) cermet

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• 作者：Bao-hai YuV.E.OvcharenkoN.N. KovalYan-hui Zhao
• 会议时间：2013-11-01
• 关键词：metal-ceramics alloys ; structural and phase modification ; pulse electron beam exposure
• 作者单位：Bao-hai Yu,Yan-hui Zhao(Institute of Metal Research Chinese Acedemy of Sciences,Shenyang 110016,China)V.E.Ovcharenko(Institute of Strength Physics and Materials Sciences,Siberia Branch,Russian Academy of Sciences,2/1 Academichesky Pr.,Tomsk 634 021,Russia)N.N. Koval(High Current Electronics Institute,Siberia Branch,Russian Academy of Sciences,,Tomsk 630 090,Russia)
• 母体文献：2013年全国粉末冶金学术会议及海峡两岸粉末冶金技术研讨会论文集
• 会议名称：2013年全国粉末冶金学术会议及海峡两岸粉末冶金技术研讨会
• 会议地点：厦门
• 主办单位：中国机械工程学会
• 语种：chi

摘要

Numerical estimations of both solubility and subsurface penetration depth of nitrogen into TiC-(Ni-Cr) cermet exposed to an electron beam pulse in a chamber containing nitrogen atmosphere have been presented in this work.Effects of pulse electron beam assisted nitriding (PEBAN) on microstructure,microhardness and wear resistance of the cermet tool for cutting steel has been studied.The results show that the PEBAN treatment depth both for nitriding the metallic binder in the TiC-(Ni-Cr) cermet reached to the 5 μm below the surface and the nitrogen content 1.5 to 2.0 % at.was obtained.These optimal parameter levels correspond to the maximum 1.9 -fold gain in microhardness values as compared to those of untreated samples.The extended lifetime of the PEBAN-treated cutting edges of cermet inserts is determined primarily by such electron beam parameters as pulse duration and energy density.In case of TiC-(Ni-Cr) cermet,we found a combination of the PEBAN process parameters which provides extending the service life of cutting edges by a factor of 2.6.