[AT] repairing machined tractor parts

[Stephen Offiler]

It can be done.  While there are a LOT of different alloys called
"stainless steel" there are some that play nice with plain carbon steel.
TIG welders will often use a filler rod that is one of the stainless steels.

SO

On Sat, Dec 7, 2019 at 12:31 PM James Peck <jamesgpeck at hotmail.com> wrote:

> James AT List Member (jamesgpeck at hotmail.com); Since we are talking about
> building up worn steel or iron parts with powdered metal, will the laser
> fuse powdered stainless to either?
>
> Steve Offiler AT List member Mechanical Engineer (soffiler at gmail.com);
> The short answer here is "any metal that can be made into an extremely fine
> powder".  Steel and iron present a real challenge as the extremely small
> particles want to oxide very quickly.  Not sure how they're getting this
> under control (suspect alloys and/or inert gas environments) but 3D folks
> are claiming steel capabilities.
>
> Carl Szabelski AT list member and tank knowledge resource (
> szabelski at wildblue.net); Using 3D printing for metal parts consists of
> laying down a film of metal powder that is fused together by laser. You
> just keep applying layers of the metal powder to build up the part. The
> laser only fuses the powder were the CAD model tells it to.  Although the
> process it similar the 3D printing of plastic parts, there no plastic
> involved. Not 100% sure which metals they can do that way, but I believe
> titanium, aluminum, steel, bronze, (and I also believe maybe iron), parts
> can be made.
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