How Even is an EvenHeat? How to Operate Furnaces Effectively

[Larrin]

New article where I used a secondary thermocouple to check the temperature distribution of an EvenHeat LB 22.5 compared to the furnace thermocouple reading. I also measured what happens when the door of the furnace is open, and measured what happens when you preheat the furnace to a temperature above the final setpoint.

https://knifesteelnerds.com/2021/04/13/how-even-is-an-evenheat-how-to-operate-furnaces-effectively/

 

[Bensbites]

Thank you. Great article.
Was this in response to a recent Facebook comment?

 

[Larrin]

Thank you. Great article.
Was this in response to a recent Facebook comment?

I'm not sure which comment you're referring to, but these measurements were taken several months ago and I finally got around to writing it up.

 

[Bensbites]

I'm not sure which comment you're referring to, but these measurements were taken several months ago and I finally got around to writing it up.

Thank you, it’s a great write up that gives me more confidence in my oven, even if it’s not a evenheat.

 

[branwell]

Great article. Thanks very much.

I have an Evenheat with the wrap around elements. Definitely found stuff near the back heated more quickly. Tried several things and ended up using a sliced up kiln brick to create a shadow from direct radiated heat. Not sure its a 100% solution but it def evened the heat pardon the pun.

 

[Kippington]

I love how someone commented (in the blog) that the article was too hard to understand. I mean, it was one of your easier posts to digest...

Somewhat counterintuitively, at low temperature the steel reaches the target temperature more slowly than at high temperature

Just quickly, why would this be the case? If there's a complicated answer, can you point me in the right direction to read up on it?
If I had to guess, perhaps the heat conductivity increases with temperature...

 

[Larrin]

I love how someone commented (in the blog) that the article was too hard to understand. I mean, it was one of your easier posts to digest...

Can't make everyone happy.

Just quickly, why would this be the case? If there's a complicated answer, can you point me in the right direction to read up on it?
If I had to guess, perhaps the heat conductivity increases with temperature...

I don't know the physics of heating well enough to answer that question without giving you false information.

 

[gregfisk]

Thanks for the great read. That answered some questions I didn’t know I had