ʻO ka hoʻomaʻamaʻa ʻana i ka mea hana ma ka ʻōpala.Ke hiki i ka mahana ma luna o ka helu koʻikoʻi, e noho no ka manawa, degass a wehe i ka oxide film, a laila e hele i loko o ka hoʻomaʻemaʻe carburizing kinoea no ka carburizing a me ka diffusion.He kiʻekiʻe ka mahana carburizing o ka carburizing vacuum, a hiki i 1030 ℃, a wikiwiki ka wikiwiki o ka carburizing.Hoʻomaikaʻi ʻia ka hana ʻili o nā ʻāpana carburized e ka degassing a me ka deoxidizing.ʻOi aku ka kiʻekiʻe o ka wikiwiki diffusion.Hana ʻia ka carburizing a me ka diffusion a hiki i ka hiki ʻana o ka ʻili a me ka hohonu.
Hiki ke mālama ʻia ka hohonu o ka carburizing vacuum a me ka ʻili;Hiki iā ia ke hoʻololi i nā waiwai metallurgical o ka papa honua o nā ʻāpana metala, a ʻoi aku ka hohonu o kāna carburizing hohonu ma mua o ka hohonu o ka carburizing maoli o nā ʻano hana ʻē aʻe.