Sebastian,
Stannum is correct. The SS component is alloy 420 which is heat treatable. He is also correct that printed parts are a true composite with the SS making up about 60% of the volume.
Recently, the furnace profiles for the sintering/infiltrating process of printed parts was changed to include an annealing phase. So parts produced over the last 6-8 months are actually somewhat softer and much less brittle than those previously produced. This is generally advantageous for most customers.
Because this printed composite is somewhat of a metallurgical oddity it wil take some experimentaion on your part before a reliable hardening profile can be established. I can tell you that these printed parts are thermally processed in a controlled atmosphere furnace. No experiments have been done for hot quenching parts. So the relative hardness of processed parts relies on the heating/cooling cycle
within the furnace. I do know that 420 stainless is subject to hardening simply by air cooling. But again, no experiments have been done to determine the effects of doing this.
Good luck with this Sebastian, we would love to hear what you can come up with.
-G
Last edited: May 19, 2012