pearlitic การใช้

• The hamon outlines the transition between the region of harder pearlitic steel at the center and back of the sword.
• For this reason, the bainitic microstructure becomes useful in that no additional heat treatments are required after initial cooling to achieve a hardness value between that of pearlitic and martensitic steels.
• Cooling a hypoeutectoid steel ( less than 0.77 wt % C ) results in a lamellar-pearlitic structure of iron carbide layers with ?-ferrite ( nearly pure iron ) between.
• This eliminates the toughness-reducing effect of a pearlitic volume fraction yet maintains and increases the material's strength by refining the grain size, which in the case of ferrite increases yield strength by 50 % for every halving of the mean grain diameter.