Really enjoyed that video Tom, I can see another use for my oil-fired furnace.
Back when I was 20-something I made an attempt at case-hardening with a similar compound, using an oxy-acetylene torch for heat. Ended up with an empty oxy set and a ruined part.
Thanks Pete.
The secret is to keep oxygen away from the part. These were close to being ruined due to the rupture of the foil. Looking back, I noticed some white smoke coming out of the furnace toward the end and that must have been when the leak started.
Tom
Do you think it was the direct air blast that did it? Looking at your video it seemed that the bottom gave way.
The
stuff I see on eBay is listed as 0.02mm thick which is about 0.0008". I can't see that holding up to heating up a pie in the oven, let alone heat treating a part...
Maybe. Perhaps it should be double wrapped or set on a plate. Of course there is always the option of putting the parts in a steel box.
Tom
(03-14-2016, 09:53 AM)TomG Wrote: [ -> ]Perhaps it should be double wrapped
That's what I was thinking also.
Ed
Back in the day, parts would be packed into an iron box with the carbon compounds and a few shavings of wood. The box lid was reasonably tight fitting and retained with a twist of iron wire - the shavings burnt up and exhausted the oxygen from within the box. Knock out was a case of lifting the box from the Furness, knocking the contents out and dunking them.
I too have used the stainless foil and as Tom said, it's razor sharp - mine must be a bit thicker than the stuff Tom was using as it doesn't burn through, but it's the very devil to get the parts out while still hot enough to quench.
I reckon a box is the way forwards.
Great video Tom, thanks for the time and effort.
John
Very nice video Tom
daveH