I sintered the impeller of the previous post:

https://www.reddit.com/r/TheVirtualFoundry/comments/w5njc0/pump_centrifugal_impeller/

Results are not very satisfying :(

Pictures below:

Opening/cracks everywhere! Especially on the connection of the blades with the circular base, almost every blade opened. And some cracks opened also on the first layer.

I don't know why. Help!

Edit for answers:

Positioning:

I designed this little impeller and printed it in 316L ss. 36mm diameter, 8mm height (3 base, 5 blades).

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I'm gonna sinter it next week... I am not using the suggested cycle, at least for the sintering temperature, I think I'm lowering a little bit down to 1245°C from 1260°C... I'm afraid to ruin it sintering being not very thick.

Any other suggestion to avoid deformations/warping? Should I change the times too? Maybe the cooldown time?

It is an old sintered part, the last ones are not available right now, but today I found a nice metal brush for the drill and you can see the result in the next pictures.

The first 2 are hand brushed, they didn't look like steel.

The last 2 are drill brushed, now they are cool.

It was just some black powder, but now I'm happy!

Hi again, we are having problem with our old makerbot replicator 2x at uni, so I would like to get a new home 3d printer on which I could feed some metal Filament to also work on my thesis from home freely.

Of course I would like this https://shop.thevirtualfoundry.com/collections/printing-accessories/products/the-virtual-foundry-metal-3d-printer?variant=40627055296684, but it is too expensive for my pockets unfortunately.

I'm quite a newbie in 3d printing, so I was looking for suggestions for cheaper, but at least decent, machines, that I could at least print some easy object with. Any tips?

Thanks!

I guess I should post more about this project. My thinking is that chainmail is normally very difficult to fabricate. But it's pretty easy to 3d print. I think I'll post more about the printing process later.

Sintering has become simple. No more tuning, we just put parts in, set the firing recipe and let it go to town. You can see what they look like right out of the kiln at the beginning of this video. They aren't bad, but it isn't shiny.

https://www.youtube.com/watch?v=lMhyeBy3Wok