Hi All,
I'm new to the knife world and damn it's amazing!
Just made two small knives using school's machine shop, and hardened them using a homemade charcoal forge (with hair dryer) and quenched with motor oil (It was room temp. oil, I didn't heat the oil first).
It was a lot of fun, but some problem occurred:
The blade was smooth before the heat treat, but it has some weird patterns after quenching.
I didn't know the exact temperature during the heat treat process. I only did the magnet test.
Before heat treating:
Knife #1 with my little Spyderco Dragonfly G10
Knife #2
After Heat treating:
Any ideas of what happened?
I'm new to the knife world and damn it's amazing!
Just made two small knives using school's machine shop, and hardened them using a homemade charcoal forge (with hair dryer) and quenched with motor oil (It was room temp. oil, I didn't heat the oil first).
It was a lot of fun, but some problem occurred:
The blade was smooth before the heat treat, but it has some weird patterns after quenching.
I didn't know the exact temperature during the heat treat process. I only did the magnet test.
Before heat treating:
Knife #1 with my little Spyderco Dragonfly G10
![image.jpeg](/proxy.php?image=http%3A%2F%2F3.bp.blogspot.com%2F-Bf9qXW_dFec%2FUXXgdms1zuI%2FAAAAAAAAA4Q%2Fh4tGaGCLS64%2Fs1600%2Fimage.jpeg&hash=d1982b8b0624f814bef6ef4142f5f254)
Knife #2
![image+(1).jpeg](/proxy.php?image=http%3A%2F%2F3.bp.blogspot.com%2F-dvRcrBOuYXU%2FUXXgYCU6-YI%2FAAAAAAAAA4I%2FAkUAhlIgscY%2Fs1600%2Fimage%2B%281%29.jpeg&hash=fa689e6359856c572f9b3f61b0c31a26)
After Heat treating:
![image+(3).jpeg](/proxy.php?image=http%3A%2F%2F1.bp.blogspot.com%2F-oT-nRVgPTPw%2FUXXgeNPaKMI%2FAAAAAAAAA4Y%2FSgAuBeEhDpQ%2Fs1600%2Fimage%2B%283%29.jpeg&hash=377fea949641103781b019fe6afe880c)
![image+(2).jpeg](/proxy.php?image=http%3A%2F%2F2.bp.blogspot.com%2F--8IZgWVHFvU%2FUXXgfIi8EKI%2FAAAAAAAAA4g%2FUuy_legUTTw%2Fs1600%2Fimage%2B%282%29.jpeg&hash=f445cc792cb7ebf9829da3cb67b91bd5)
Any ideas of what happened?
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