casehardening

"carburize:To treat, combine, or impregnate with carbon, as when casehardening steel."

使渗,化:使与一起处理,使与或使充满,如将钢的表粹火硬化.

Casehardening involves a change of surface properties to produce ahard,wear-resistant shell about a tough,fracture-resistant core.

表硬化包含一个硬度、耐磨的壳以及的芯。