Workability Studies in Forming of Sintered Fe-0.35C Powder Metallurgy Preform During Cold Upsetting

钢铁研究学报(英文版), 2011, 18(12): 71-78.

Workability Studies in Forming of Sintered Fe-0.35C Powder Metallurgy Preform During Cold Upsetting

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1.School of Engineering and Physics, Faculty of Science, Technology and Environment, University of the South Pacific （Laucala Campus）, Suva, Fiji

2.School of Engineering and Physics, Faculty of Science, Technology and Environment, University of the South Pacific （Laucala Campus）, Suva, Fiji

关键词：粉末冶金 , 烧结 , 瓶坯 , 冷镦 , 加工性 , 三轴应力状态 , 成型 , 理论密度

Workability Studies in Forming of Sintered Fe-0.35C Powder Metallurgy Preform During Cold Upsetting

Keywords： powder metallurgy , failure analysis , plastic behaviour , workability ,

An experimental investigation on the workability behaviour of sintered Fe-0.35C steel preforms under cold upsetting,have been studied in order to understand the influence of aspect ratio and lubrication condition on the workability process.The above mentioned powder metallurgy sintered preform with constant initial theoretical density of 84% of different aspect ratios,namely,0.4 and 0.6 respectively were prepared using a suitable die-set assembly on a 1 MN capacity hydraulic press and sintered for 90 min at 1200 ℃.Each sintered preform was cold upset under nil/no and graphite frictional constraint,respectively.Under the condition of triaxial stress densification state,axial stress,hoop stress,hydrostatic stress,effective stress and formability stress index against axial strain relationship was established and presented in this work.Further more,attained density was considered to establish formability stress index and various stress ratio parameters behaviour.

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Workability Studies in Forming of Sintered Fe-0.35C Powder Metallurgy Preform During Cold Upsetting

Workability Studies in Forming of Sintered Fe-0.35C Powder Metallurgy Preform During Cold Upsetting

参考文献