- Joined
- Feb 5, 1999
- Messages
- 1,068
I experienced something new today which has my pretty stumped.
I was heat treating 8 foil wrapped ATS34 blades in my Paragon furnace. It was nothing I haven't done many times and as recently as last week. The tool wrap is from Travers Tool and is the middle of the roll.
When I pulled the blades out from their 1950 soak and set the rack on my steel table, I snipped the foil ends and started pulling out blades. All of the blades had perferated foil. The tips of the foil wrap looked like swiss cheese, with some blade points protruding from what was left of the foil.
The foil damage looked like spatter on one packet. The foil had shiny splatters on it and under each was a pinhole. It actually looked like solder droplets. The blades all had minor scale near the tip. One may have a couple of pits.
I've done about 40 blades already out of this roll of foil and the heat treat practices are a constant. I always do it the same way. Heat treating is one of the few things in life I'm really anal about.
I checked the element as best I could and didn't see anywhere that it looked like I may have put a foil pack into the coil. The rear of the packets were fine. The worst had damage back as much as halfway, and didn't seem to matter whether the packet was on the outside edges of the rack.
I don't want this to be a 2 page post, but any ideas at all? I've used this furnace for 14 or 15 years, replacing the element and thermocouple as needed. It's a 110v unit. It looked like there was a real hot spot, yet the alarm, set for 2000, never was triggered. And it worked fine last week.
Ideas?
Thanks,
Gene
I was heat treating 8 foil wrapped ATS34 blades in my Paragon furnace. It was nothing I haven't done many times and as recently as last week. The tool wrap is from Travers Tool and is the middle of the roll.
When I pulled the blades out from their 1950 soak and set the rack on my steel table, I snipped the foil ends and started pulling out blades. All of the blades had perferated foil. The tips of the foil wrap looked like swiss cheese, with some blade points protruding from what was left of the foil.
The foil damage looked like spatter on one packet. The foil had shiny splatters on it and under each was a pinhole. It actually looked like solder droplets. The blades all had minor scale near the tip. One may have a couple of pits.
I've done about 40 blades already out of this roll of foil and the heat treat practices are a constant. I always do it the same way. Heat treating is one of the few things in life I'm really anal about.
I checked the element as best I could and didn't see anywhere that it looked like I may have put a foil pack into the coil. The rear of the packets were fine. The worst had damage back as much as halfway, and didn't seem to matter whether the packet was on the outside edges of the rack.
I don't want this to be a 2 page post, but any ideas at all? I've used this furnace for 14 or 15 years, replacing the element and thermocouple as needed. It's a 110v unit. It looked like there was a real hot spot, yet the alarm, set for 2000, never was triggered. And it worked fine last week.
Ideas?
Thanks,
Gene
