ʻO ke kila Duplex e pili ana i kahi ʻohana o nā kila kila kila nona kahi microstructure ʻelua-phase i haku ʻia me nā pae austenitic (face-centered cubic crystal structure) a me ferritic (body-centered cubic crystal structure). Hoʻokō ʻia kēia ʻano pālua-phase ma o kahi hui alloy kikoʻī e komo pū ana me nā mea e like me chromium, nickel, molybdenum, a me ka nitrogen.
ʻO nā kila kila duplex maʻamau no ka moʻo UNS S3XXX, kahi e kū ai ʻo "S" no ke kila kila, a hōʻike nā helu i nā ʻano hui like ʻole. Hāʻawi ka microstructure ʻelua-phase i ka hui pū ʻana o nā waiwai i makemake ʻia, e hana ana i ke kila duplex i kūpono no nā noi like ʻole. ʻO kekahi mau hiʻohiʻona koʻikoʻi o ke kila duplex:
1. Ke Kū'ē ʻana i ka ʻAi ʻOle: Hāʻawi ke kila Duplex i ke kū'ē ʻana i ka ʻai ʻole ʻia, ʻoi aku hoʻi i nā wahi ʻino i loaʻa nā chloride. ʻO kēia ka mea kūpono no ka hoʻohana ʻana i ka hana kemika, ka ʻaila a me ke kinoea, a me nā noi moana.
2. Ikaika Kiʻekiʻe: Ke hoʻohālikelike ʻia me nā kila kila austenitic, ʻoi aku ka ikaika o ke kila duplex, e kūpono ana no nā noi kahi e pono ai ka hoʻonui ʻana i ka ikaika mechanical.
3. Paʻakikī maikaʻi a me ka Ductility: Mālama ke kila Duplex i ka paʻakikī maikaʻi a me ka ductility, ʻoiai ma nā mahana haʻahaʻa. He waiwai nui kēia hui pū ʻana o nā waiwai i nā noi kahi e hiki ai i ka mea ke kau ʻia i nā ukana a me nā mahana like ʻole.
4. Ke Kū'ē ʻana i ka Nahā ʻana o ke Kokoke: Hōʻike ke kila Duplex i ke kūpaʻa maikaʻi i ka nahā ʻana o ka kokoke, kahi ʻano popopo e hiki ke hana ma lalo o ka mana hui pū ʻia o ke koʻikoʻi tensile a me kahi ʻano popopo.
5. Kumukūʻai Kūpono: ʻOiai hiki ke ʻoi aku ke kumukūʻai o ke kila duplex ma mua o ke kila kila austenitic maʻamau, ʻo kona mau ʻano hana e hoʻāpono pinepine i ke kumukūʻai, ʻoiai i nā noi kahi e koʻikoʻi ai ke kūpaʻa a me ka ikaika i ka pala.
ʻO nā papa kila kila duplex maʻamau e komo pū meʻelua pālua 2205 (UNS S32205)a me ka duplex 2507 (UNS S32750). Hoʻohana nui ʻia kēia mau māka i nā ʻoihana e like me ka hana kemika, ka ʻimi ʻana i ka ʻaila a me ke kinoea, ka ʻenekinia kai a me ke kai, a me ka hana pulp a me ka pepa.
Ka manawa hoʻouna: Nov-27-2023