Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Plural heating steps including sintering
Patent
1998-08-07
1999-10-19
Jenkins, Daniel J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Plural heating steps including sintering
419 57, B22F 310
Patent
active
059703083
ABSTRACT:
A method and apparatus for introducing an oxidant mixed with a carrier gas into pre-heating zone of a continuous furnace for effectively removing lubricant from powder metal compacts prior to sintering at high temperatures. Mixing a controlled amount of a gaseous oxidizing agent such as moisture, carbon dioxide, air or mixtures thereof with a carrier gas and introducing the mixture into the preheating zone of a continuous furnace under controlled conditions accelerates removal of lubricant from powder metal compacts prior to sintering at high temperature by decomposing lubricant vapors into smaller and more volatile hydrocarbons, produces sintered components with close to soot- and residue-free surfaces and with the desired physical properties, prolongs the life of furnace components including muffles and belts, and reduces downtime, maintenance and operating costs.
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Berger Kerry Renard
Bowe Donald James
Garg Diwakar
Li Xianming
Marsden James Garfield
Air Products and Chemicals Inc.
Jenkins Daniel J.
Jones II Willard
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