Recently I made a small veg. chopper from an old circular saw blade. I had my forge running for another project and decided to heat treat the chopper blade too. I got it to non magnetic and then quenched it in hot water. ( just to see what would happen) . The blade got a slight warp, so I straightened it with a couple taps with hammer on my anvil.
The file hardness test showed great, so proceeded to sand and polish. When I got to about 600 grit a pattern of circular microscopic “cracks” started showing up,radiating out from where I tapped it to take the warp out. Is this the martensite cracking, or what? Looks kinda cool but is the blade shot now?
The file hardness test showed great, so proceeded to sand and polish. When I got to about 600 grit a pattern of circular microscopic “cracks” started showing up,radiating out from where I tapped it to take the warp out. Is this the martensite cracking, or what? Looks kinda cool but is the blade shot now?