Surface Densification Coupled with Higher Density Processes Targeting High-Performance Gearing


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This paper will describe a powder and processing method that facilitates single presssingle sintered densities approaching 7.5 g/cm³. At this sintered density, mechanical properties of the powder metal (P/M) component are significantly improved over current P/M technologies and begin to approach the performance of wrought steels. High performance gears have the added requirement of rolling contact fatigue durability that is dependent upon localized density and thermal processing. Combining high density processing of engineered P/M materials with selective surface densification enables powder metal components to achieve rolling contact fatigue durability and mechanical property performance that satisfy the performance requirements of many high strength automotive transmission gears. Data will be presented that document P/M part performance in comparison to conventional wrought steel grades.



Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim




F. Hanejko et al., "Surface Densification Coupled with Higher Density Processes Targeting High-Performance Gearing", Materials Science Forum, Vols. 534-536, pp. 317-320, 2007

Online since:

January 2007




[1] MPIF Standard 35, 2003 Edition, Metal Powders Industries Federation, Princeton, NJ.

[2] H. Sanderow: Final Report, Rolling Contact Fatigue Test Program, CPMT, September 2001, MPIF, Princeton, NJ.

[3] H. Rutz, F. Hanejko: High Density Processing of High Performance Ferrous Materials, ed. C. Lall & A.J. Newpaver, Advances in Powder Metallurgy and Particulate Materials-1994, MPIF, vol. 5, pp.117-133.

[4] K. Lipp, G. Hoffmann: Design for Rolling Contact Fatigue, Edited by V. Arhold and W. Jandeska, Advances in Powder Metallurgy and Particule Materials-2002, MPIF, part 5, pp.28-51.

[5] R. Lawcock: Rolling-Contact Fatigue of Surface Densified Gears, International Journal of Powder Metallurgy, Vol 42/1, (2006), pp.17-31.