Sinter-hardening properties of partially-diffuse alloyed Fe-Cu-Ni-Mo-C material prepared by die wall lubricated warm compaction
The sinter-hardening properties of a partially-diffuse alloyed Fe-2Cu-2Ni-1Mo-1C material were investigated.Samples were formed by die wall lubricated warm compaction method,then,sintered in hydrogen atmosphere at 1 150 ℃ for 1 h and cooled at 4.6,2.9 and 1.5 ℃/s,respectively,from 900 ℃ down to 600 ℃.Effects of cooling rate on mechanical properties and microstructure of the material were discussed.The results show that when the cooling rate increases,the tensile strength of the material increases,while,the elongation shows opposite result.The sintered material has a tensile strength of 872 MPa and an apparent hardness of HB 257 at a cooling rate of 4.6 ℃/s.Slight shrinkage is observed.Heterogeneous microstructures containing martensite,bainite,pearlite and nickel-rich retained austenite are observed in the material.Higher martensite content can be obtained at higher cooling rate,while,at lower cooling rate,pearlite and retained austenite dominated the microstructure.
powder metallurgy die wall lubricated warm compaction sinter-hardening microstructure
XIAO Zhi-yu SHEN Yuan-xun NGAI Tungwai Leo WU Yuan-biao LI Yuan-yuan
School of Mechanical Engineering,South China University of Technology,Guangzhou 510640,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）