[AR] Re: Braze joint design guidelines?
- From: Peter Fairbrother <peter@xxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Fri, 9 Aug 2019 13:41:24 +0100
On 08/08/2019 20:59, Evan Daniel wrote:
This joint was copper tube to the Shapeways bronze/stainless hybrid
printed material. Info and datasheet, if you haven't seen it before:
https://www.shapeways.com/materials/steel
https://static1.sw-cdn.net/files/cms/materials/data-sheets/Steel%20data%20sheet.pdf
It's 60% 420SS sintered powder, infused with 40% bronze (90% Cu / 10% Sn).
I saw the as-printed surface finish was 600uin, which might be a problem.
Could you machine the surfaces to be brazed, preferably with HSS or
carbide tooling not abrasive belts? The internal holes should be easy
enough, just drill and/or ream them out; the external surfaces might be
trickier.
Also the thermal conductivity is given as 22W/mK, which is unexpectedly
low - Uwe might be right about that.
Peter Fairbrother
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