图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
Jianzhong WANG,Haiqing YIN and Xuanhui QU State Key Laboratory for Advanced Metals and Materials,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China
摘 要:A new method for producing higher density PM parts,high velocity compaction(HVC),was presented in the paper.Using water atomized pure iron powder without lubricant admixed as the staring material,ring samples were compacted by the technique.Scanning electron microscopy(SEM) and a computer controlled universal testing machine were used to investigate the morphologies and the mechanical properties of samples,respectively.The relationships among the impact velocity,the green density,the sintered density,the bending strength and the tensile strength were discussed.The results show that with increasing impact velocity,the green density and the bending strength increase gradually,so the sintered density does.In addition,the tensile strength of sintered material is improved continuously with the sintered density enhancing.In the study,the sintered density of 7.545 g/cm3 and the tensile strength of 190 MPa are achieved at the optimal impact velocity of 9.8 m/s.
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