Developments in Die Pressing Strategies for Low-Cost Titanium Powders
Recent developments in the production of low-cost titanium powders have rejuvenated interest in manufacturing titanium powder metallurgy components by direct press and sinter techniques. However excessive friction typically observed during titanium powder pressing operations leads to numerous problems ranging from non-homogeneous green densities of the compacted powder to excessive part ejection forces and reduced die life due to wear and galling. An instrumented double-acting die press was developed to both investigate the mechanics of titanium powder pressing (particularly for the new low-cost powder morphologies) and to screen potential lubricants that could reduce frictional effects. As will be discussed, the instrument was used to determine friction coefficients and to evaluate a number of candidate lubricants. These results were then used to optimize the lubricant system to reduce die-wall stresses and improve part density uniformity.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 965150
- Report Number(s):
- PNNL-SA-66417; VT0505000; TRN: US200920%%254
- Resource Relation:
- Conference: TMS 2009 138th Annual Meeting & Exhibition: Supplemental Proceedings, Volume 1: Materials Processing and Properties, 1:549-556
- Country of Publication:
- United States
- Language:
- English
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