ʻO ke kila Duplex e pili ana i ka ʻohana o nā kila kuhili ʻole i loaʻa i ka microstructure ʻelua ʻāpana o nā austenitic (ke alo-centered cubic crystal structure) a me ka ferritic (body-centered cubic crystal structure). Hoʻokō ʻia kēia ʻano hana ʻelua ma o ka haku mele ʻana me nā mea e like me ka chromium, nickel, molybdenum, a me ka nitrogen.
No ka UNS S3XXX mo'o UNS S3XXX ka mea ma'amau duplex, kahi o "S" no ke kuhili, a ua hoike mai na helu i na haku mele. Hāʻawi ka microstructure ʻelua i kahi hui o nā waiwai i makemake ʻia, e hana ana i ke kila duplex kūpono no nā noi like ʻole. ʻO kekahi mau hiʻohiʻona nui o ke kila duplex:
1.Corrosion Resistance: Hāʻawi ke kila Duplex i ka pale ʻana i ka corrosion maikaʻi loa, ʻoi aku hoʻi i nā wahi paʻakikī i loaʻa nā chlorides. He mea kūpono kēia no ka hoʻohana ʻana i ka hana kemika, ka aila a me ke kinoea, a me nā noi kai.
2.High Strength: Hoʻohālikelike ʻia me nā austenitic stainless steels, ʻoi aku ka ikaika o ka duplex steel, e kūpono ana i nā noi kahi e pono ai ka ikaika mechanical.
3.Good Toughness and Ductility: Mālama ke kila Duplex i ka paʻakikī a me ka ductility maikaʻi, ʻoiai ma nā haʻahaʻa haʻahaʻa. He mea waiwai kēia hui ʻana o nā waiwai i nā noi kahi e kau ʻia ai ka mea i nā ukana a me nā mahana like ʻole.
4.Stress Corrosion Cracking Resistance: Hōʻike ke kila Duplex i ke kū'ē maikaʻi i ke koʻikoʻi koʻikoʻi, kahi ʻano ʻino e hiki ke hana ma lalo o ka mana hui o ke koʻikoʻi tensile a me kahi kaiapuni corrosive.
5.Cost-Effective: ʻOiai ʻoi aku ka maikaʻi o ke kila duplex ma mua o ka austenitic stainless steel maʻamau, ʻo kāna mau hiʻohiʻona hana e hōʻoia pinepine ai i ke kumukūʻai, ʻoi aku hoʻi i nā noi kahi koʻikoʻi ke kūpaʻa a me ka ikaika.
Loaʻa nā māka kuhili ʻole duplex maʻamauduplex 2205 (UNS S32205)a me duplex 2507 (UNS S32750). Hoʻohana nui ʻia kēia mau māka i nā ʻoihana e like me ka hana kemika, ka ʻimi ʻaila a me ke kinoea, nā ʻenekinia waho a me ka moana, a me ka hana pulp a me ka pepa.
Ka manawa hoʻouna: Nov-27-2023