grain structure only alters if you quench, leave to cool naturally and structure stays the same. and to harden you heat to cherry and quench a few times sorted. gonna nitride it aswell.
Make sure you temper afterwards!
Actually, what's the best temper for a bike lock? Too hard and it will be brittle, too soft it will be easily cuttable...would spring temper the best compromise?
Make sure you temper afterwards!
Actually, what's the best temper for a bike lock? Too hard and it will be brittle, too soft it will be easily cuttable...would spring temper the best compromise?