How can I maintain consistent properties among my sintered powder metal parts?
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||Tom Philips |
Sr. Principal Applications Engineer
Many processing variables such as powder size, composition and purity; size distribution; and carbon content affect sintered components’ final properties. The type and amount of lubricants, compaction densities, and furnace parameters—temperature, time at temperature, cooling rates, and belt loading—also influence the end results. Most of these variables are determined during the design stage of the component.
The sintering atmosphere is often overlooked as a variable. The atmosphere properties can vary over time. Controlling an atmosphere system’s variables can improve the consistency of sintered properties. The primary variables in an atmosphere system are the atmosphere composition, purity, flow rates and distribution, pressure inside the furnace, exit velocity, stability (external influences), and the door openings.
For a technical paper or to schedule an audit of your process, call 800-654-4567, or visit www.airproducts.com/sinterpm