Warm Compaction Behaviors of Ferrous Powders with Different Forms of Molybdenum Addition
Fe-2Cu-2Mo-0.8C powders were obtained by mixing Fe,Cu and graphite powders with pure Mo powder,Mo-Fe alloy powder and mechanically alloyed Mo-Fe powder,respectively.The warm processing property of the Fe-2Cu-2Mo-0.8C powder mixes with different forms of molybdenum,as well as the performances of the green compacts and the sintered parts were tested to investigate the effects of different addition ways of the molybdenum.The results show that homogeneous composition distribution can be obtained for powder mixes and compacts with the addition of mechanically alloyed Mo-Fe powder,and the highest green density of 7.29 g/cm3 and green strength of 27 MPa were obtained for Fe-2Cu-2Mo-0.8C powder mixes added with mechanically alloyed Mo-Fe powders at a compacting temperature of 120℃ and warm pressure of 800MPa.The sintered Fe-2Cu-2Mo-0.8C specimens have a density of 7.31 g/cm3,a hardness of 95HRB and a tensile strength of 618MPa,respectively.Compared with adding in the forms of pure Mo and Mo-Fe alloy powders,adding mechanically alloyed Mo-Fe powders obtains more uniform microstructure and better comprehensive properties of green compacts and sintered parts,showing the potential of improving the density and mechanical properties of ferrous materials containing molybdenum.
Fe-2Cu-2Mo-0.8C materials Molybdenum alloying powders Warm compaction Microstructure Mechanical properties
Chen Wenchao Cheng Jigui Chen Pengqi Zhang Jianhua
School of Materials Science and Engineering,Hefei University of Technology,193 Tunxi Road,Hefei 2300 School of Materials Science and Engineering,Hefei University of Technology,193 Tunxi Road,Hefei 2300
国际会议
北京
英文
260-265
2018-09-16(万方平台首次上网日期,不代表论文的发表时间)