I am a cutlery engineer/ scientist with 43 years experience and I see the softening of steel all the time when grinding and sharpening knives takes place without care. If you wish to visit the extensive CATRA knife laboratories in Sheffeld UK I will show you a demonstration of the problem and the solution how to solve it
@CATRAUK the tool is not necessarily heat treated yet making this irrelevent, unless the tool reaches its decarburizing temperature. still, generally it is best to keep the edge cool anyway....
@CATRAUK no, it doesn't. sparks mean nothing, sparks are pieces of metal ripped off in high speed and taken to a temperature where they oxidize and glow. all it means is that the wheel has a high speed. and besides, the edge loses its heat treatment only when it's over 200-300degrees celsius for HOURS on end. if that blade would get even to 70degrees celsius, he couldn't hold it in his hands no more cuz it would burn him. trust me, I'm an engineer
@CATRAUK These knives are likely going to be harder than the vast majority culinary knife produced in Europe. Also Shirogami steel is known to spark on water cooled wheels even when other steels don't.
Hi BBE
I am a cutlery engineer/ scientist with 43 years experience and I see the softening of steel all the time when grinding and sharpening knives takes place without care. If you wish to visit the extensive CATRA knife laboratories in Sheffeld UK I will show you a demonstration of the problem and the solution how to solve it
CATRAUK 2 weeks ago
wow
fairhillnorrie 2 weeks ago
despite the water the sparks indicate he is over heating the cutting edge, which results in a softer knife edge and significantly less life.
CATRAUK 3 weeks ago
@CATRAUK the tool is not necessarily heat treated yet making this irrelevent, unless the tool reaches its decarburizing temperature. still, generally it is best to keep the edge cool anyway....
liamg1995 3 weeks ago
@CATRAUK no, it doesn't. sparks mean nothing, sparks are pieces of metal ripped off in high speed and taken to a temperature where they oxidize and glow. all it means is that the wheel has a high speed. and besides, the edge loses its heat treatment only when it's over 200-300degrees celsius for HOURS on end. if that blade would get even to 70degrees celsius, he couldn't hold it in his hands no more cuz it would burn him. trust me, I'm an engineer
BBoyEmanuel 2 weeks ago
@CATRAUK These knives are likely going to be harder than the vast majority culinary knife produced in Europe. Also Shirogami steel is known to spark on water cooled wheels even when other steels don't.
JonoNZ110 2 weeks ago
Mr Miyagi!?
Demoman42 3 weeks ago
lol looks like he is riding a GSXR
luked1964 1 month ago
can i come?
kukurikukukuru 4 months ago