Can You Trust Your Magnet During Heat Treating?

Awesome, thank you!
So much better to have some intuition about what's going on, even when just doing a simple forge heat-treat.
 
Awesome read again Larrin. You definitely should write a book. I mean we like things for free but... well when someone is doing great things it's nice that they continue.
I used to teach welding and I realized the need for good textbooks. The best textbooks that we had were ok but had a lot of general practice opinion that did not age well. It's a rare person who can break down the information that the average person of a given trade can understand it while remaining clear and concise and not turning it into a research text and not filling it with popular myths. I was talking about welding I'm sure it never happened in the knife world but it uhhh... could have.
 
Storm W said:
Awesome read again Larrin. You definitely should write a book. I mean we like things for free but... well when someone is doing great things it's nice that they continue.
I used to teach welding and I realized the need for good textbooks. The best textbooks that we had were ok but had a lot of general practice opinion that did not age well. It's a rare person who can break down the information that the average person of a given trade can understand it while remaining clear and concise and not turning it into a research text and not filling it with popular myths. I was talking about welding I'm sure it never happened in the knife world but it uhhh... could have.
Click to expand...
I am considering doing a book right now. There are certain benefits to the book format that are better than individual articles (and vice versa). The upside of writing individual articles is that a lot of the references and background information has already been gathered for a potential book. With individual articles all of them have to be standalone, at least to some extent. A book can introduce concepts and then build on them in a narrative fashion. Also people tend to skim articles but read books a little more seriously. Any book I write would be a ways off though.
 
Hehe....Larrin, I already have a binder filled with your articles.
Thanks for giving us this well researched and pertinent information.
You are discussing the concepts that I was having a difficult time getting explained to me.
Between you and Kevin Cashen I'm starting to get a handle on some of this.
 
stezann said:
Thank you Larrin!
very nice articles, with a lot of insight and details.
https://i2.wp.com/knifesteelnerds.com/wp-content/uploads/2019/02/W2-CCT.jpg?resize=768,563&ssl=1
In this CCT chart i noticed that the cooling curves associated with 302 and 284 HV10 are "broken"; is it related to recalescence?
If so why the other curves as well as those of the next CCT chart aren't?
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Those do look a bit odd, it looks like the heat of transformation is affecting it right along the transformation temperature line. As the transformation occurs, heat is generated because the reaction is exothermic, it's called the "latent heat" of the transformation, or recalescence as you mentioned. Whether it is seen in the cooling path on a CCT diagram depends on the size of the sample, the given cooling rate, and the cooling capability of the equipment they are using.

Edit: Here is an example of what it typically looks like:
W1-CCT.gif
 
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