Hello I’m fairly new to Blacksmithing and I hope no one minds me asking, but I figure this is the best place to ask.
I was just wondering if there is a reason my knives keep breaking when I test them? I have done everything possible to ensure a good quench and temper. I’ve even used a microscope to look for cracks before going into a quench. I temper my knives with blue on the spine and straw yellow on the cutting edge. When I went to test the flexibility of my latest knife by pressing down slightly on the middle my knife broke.
I am just wondering what I am doing wrong. I was using a file at the time that wasn’t case hardened for my metal. The knife was about seven inches long and one inch wide. the only thing that I didn’t take much care to do was check if the metal was non magnetic before going into the quench, however because the color was orangy yellow I knew the knife was none magnetic or above.
I would deeply appreciate any suggestions or pointers on where I’m going wrong or things I can improve so as to get the best quench and temper that I can.