Как сделать зубило своими руками и закалить его для рубки металла. Закалка и термообработка

How to make a chisel at home and temper it correctly. The main purpose is to cut metal. We will forge a finger from a caterpillar. A chisel was also forged from ordinary reinforcement - it holds the tempering and does not dull. When tempering, we used the advice of Leonid Arkhangelsky, who, by the way, has his own channel - Forge with Maria and Leonid Arkhangelsky. Tempering and heat treatment at home. We tried to sharpen the chisel with a manual workbench - but it went very slowly, so we used a grinder. Several things are worrying. 1 - Forgot to make a vacation after tempering 2 - Tempering temperature - perhaps they did not hold it long enough. Your advice?