- Feb 7, 2006
im assuming the "hamon" is the tempering line on a well made blade. i am curious, how do you achieve this? i know this is a noob question but i wont learn if i dont ask.
bladsmth said:The hamon is the transition line between pearlite and martensite.There is often a troosite portion to the boundary.It is created by having the edge cool to martensitic steel faster than the spine,and allowing the spine to continue cooling at a slower rate to form pearlite/troosite.The two main ways it is done is by clay coating portions of the blade and full quenching (or interrupted quenching), or by edge quenching.As mete said,it is formed by quench not tempering.Thus it is a quench line,NOT a temper line.The different steel structures polish to a different look,and with proper etching and polishing can show a dramatic contrast.Not all steels are suitable for getting a good hamon.The 10XX series blade steels do well.