Effects of Lubrication on the Powder Metallurgy Processing of Titanium

Jia Lou; Brian Gabbitas; De Liang Zhang

doi:10.4028/www.scientific.net/KEM.520.133

Paper Titles

Titanium Powder from the TiRO™ Process
p.95

Fundamental Reactor Design Considerations for Reducing TiCl₄ Metallothermically to Produce Ti Powder
p.101

A Novel Process for Making Spherical Powders of High Nb Containing TiAl Alloys
p.111

Role of Surface Contamination in Titanium PM
p.121

Effects of Lubrication on the Powder Metallurgy Processing of Titanium
p.133

Effect of Contaminants on Sintering of Ti and Ti-6Al-4V Alloy Powders in an Argon-Back-Filled Graphite Furnace
p.139

Metal Injection Moulding of Low Interstitial Titanium
p.145

Metal Injection Moulding of Titanium and Titanium-Aluminides
p.153

Design Strategy of Binder Systems for Ti Injection Moulding
p.161

HomeKey Engineering MaterialsKey Engineering Materials Vol. 520Effects of Lubrication on the Powder Metallurgy...

Effects of Lubrication on the Powder Metallurgy Processing of Titanium

Abstract:

The role of lubrication on the consolidation behaviour of titanium powder, density increase and change in microstructure on subsequent sintering was investigated. HDH titanium powder mixed with 0-2wt% stearic acid or magnesium stearate was cold compacted. It was found that 0.3-0.6wt% of internal lubricant significantly improves the compressibility. However, more than 0.6wt% of lubricant aids the densification in the low-pressure region but limits the maximum density at high pressure. Moreover, 0.3-0.6wt% of lubricant offers a more uniform density distribution to the powder compact, while greater than 0.6wt% of lubricant leads to a segregation of lubricant in the surface region. The shape retention, ejection behaviour, de-lubrication behaviour and sintered properties were also studied in this work.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 520)

Pages:

133-138

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.520.133

Citation:

Cite this paper

Online since:

August 2012

Authors:

Jia Lou, Brian Gabbitas, De Liang Zhang

Keywords:

Compaction, Lubrication, Powder metallurgy, Sintering, Titanium

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] A. Simchi, Effects of lubrication procedure on the consolidation, sintering and microstructural features of powder compacts, Mater. Des., 24(2003) 585-594.

DOI: 10.1016/s0261-3069(03)00155-9

Google Scholar

[2] N. Solimanjad and R. Larsson, Die wall friction and influence of some process parameters on friction in iron powder compaction, Mater. Sci. Technol., 19(2003) 1777-1782.

DOI: 10.1179/026708303225009517

Google Scholar

[3] N. Özkan and B. J. Briscoe, Characterization of Die-Pressed Green Compacts, J. Eur. Ceram. Soc., 17 (1997) 697-711.

DOI: 10.1016/s0955-2219(96)00090-8

Google Scholar

[4] M. Qian, Cold compaction and sintering of titanium and its alloys for near-net shape or preform fabrication, Inter. J. Powder Metallurgy. 46 (2010) 29-44.

Google Scholar

[5] S.T. Hong, Y. Hovanski, C.A. Lavender and K.S. Weil, Investigation of Die Stress Profiles During Powder Compaction Using Instrumented Die, J. Mater. Eng. Perform., 17(2008) 382–386.

DOI: 10.1007/s11665-008-9229-1

Google Scholar

[6] Y. Hovanski, K.S. Weil and C.A. Lavender, Developments in Die Pressing Strategies for Low-Cost Titanium Powders, TMS 2009 138th Annual Meeting & Exhibition: Supplemental Proceedings, Volume 1: Materials Processing Properties, 2009, TMS, Warrendale, PA, 549–556.

Google Scholar

[7] K. S. Hwang, K. H. Lin, Lubricants Removal in Metal Powder Compacts, Int. J. Powder Metall. 28 (1992) 353-360.

Google Scholar