Authors:
Lars Wimbert (GKN Powder Metallurgy, Germany),
René Lindenau (GKN Sinter Metals Engineering GmbH, Germany),
Kylan McQuaig (Hoeganaes Corporation, USA)
Abstract:
Most mechanical properties of powder metallurgical (PM) components significantly depend on the part’s density. Considering the higher complexity of modern PM parts and the demand for higher strength with less weight, increased green and sintered densities are required. The development of new advanced lubricants is one key factor for this, providing additives with superior lubricity, clean burn-off and unsophisticated usability. This contribution documents recent developments in lubricant technology with experimental results from lab scale to serial production. The presented lubricant solutions allow powder compaction to higher density levels using lower lubricant additions without the need for heated tooling into a tight temperature range. Especially for complex shaped parts, the broader temperature range helps to keep the lubrication sufficient for tool sections with higher friction, resulting in ejection pressures less than 50% of the values seen for amide waxes.
DOI:
https://doi.org/10.59499/WP225371442