Banding
Banding, or the formation of discolored bands across the steel with greater concentrations of other alloy substances, can make the metal weaker and more prone to cracking, not to mention affect the look of the metal significantly. Carbon steel must be heated to very high temperatures to properly fuse the carbon and the iron. Sometimes, as the metal is cooling, an event known as "ferrite banding" occurs, which can be thought of like the growth of "crystals" within the metal. Like crystal growth, those bands are made from accumulating material being drawn together due to similar properties---in this case, the carbon attracts other carbon molecules.
Banding Causes
The most important stage of the manufacturing process is the cooling. If the carbon steel is cooled rapidly, the carbon has little time to migrate and little banding occurs. If the steel has a slow cool-down time, then the carbon can move more easily and banding is more likely. Reheating steel and allowing it to cool slowly often causes banding to occur, for similar reasons.
Read more: What Are the Causes of Banding in Medium Carbon Alloy Steel? | eHow.com http://www.ehow.com/how-does_6177765_ca … z1AYfp1JIG
AchimW a écrit:C'est le fibrage de l'acier, très visible dans cet acier. Et … on ne dirait pas que c'est du damas, mais plutôt du wootz. Içi une photo d'une lame forgé par un copain suisse dans le même acier:
picko a écrit:Beaux les kirisprésentés en boîte comme ça c'est très sympa.
les flacons c'est pour quoi au juste ?
thom a écrit::bave:![]()
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