1. ʻO ka lua o ka hanauna o ka paipu kila kila duplex he mau ʻano o ke kalapona haʻahaʻa loa, haʻahaʻa ka naikokene, ʻo ka haku mele maʻamau ʻo Cr5% Ni0.17%n a me 2205 ʻoi aku ka nui o ka naikokene ma mua o ka hanauna mua o ka paipu kila kila duplex, kahi e hoʻomaikaʻi ai i ke kūʻē ʻana i ka corrosion stress a me ke kūʻē ʻana o ka pitting o nā media acidic me ka nui o ka ion chloride. He mea hana austenite ikaika ka naikokene. ʻO ka hoʻohui ʻana o ka naikokene i loko o ke kila kila duplex ʻaʻole wale ia e hoʻomaikaʻi i ka plasticity a me ka paʻakikī o ke kila me ka ʻole o ka hōʻino maopopo, akā hoʻomaikaʻi pū i ka ikaika o ke kila, a kāohi i ka ua a me ka lohi o nā carbides.
2. Hana hoʻonohonoho: I loko o ka hale kōmahana, ʻo ka austenite a me ka ferrite ka hapalua o ka hopena paʻa, nona nā ʻano o ke ʻano biphase. Mālama ia i nā ʻano o ka helu liʻiliʻi o nā alakaʻi kila kila ferritic, ke kūʻē ʻana i ka pitting, ka haki ʻana a me ka chloride stress corrosion, me ka paʻakikī maikaʻi, ka mahana embrittlement haʻahaʻa, ke kūʻē ʻana i ka intergranular corrosion a me nā waiwai mechanical a me ka weldability maikaʻi.
3. Ma lalo o nā kūlana like o ke kaomi hiki ke mālama i nā mea, ʻo ka ikaika hua a me ke kūpaʻa i ka corrosion stress o ka paipu kila kila duplex he aneane 1 mau manawa o ke kila kila austenitic, ʻoi aku ka liʻiliʻi o ka coefficient hoʻonui linear ma mua o ke kila kila austenitic o ka ʻōnaehana kila kila austenitic, a kokoke ke kila kalapona haʻahaʻa iā ia. ʻAʻole maikaʻi ka forging anu e like me ke kila kila austenitic.
4. Weldability: ʻO ka paipu kila kila duplex 2205 he weldability maikaʻi, welding anu, wela māwae ʻike liʻiliʻi, ʻaʻohe preheating ma mua o ka welding, ʻaʻohe mālama wela ma hope o ka welding. Ma muli o ke ʻano liʻiliʻi o ka ferrite hoʻokahi-phase a me ka nui o ka nitrogen i loko o ka wahi i hoʻopilikia ʻia e ka wela, hiki ke hoʻomalu ʻia ka ikehu uea welding i kēia manawa ke koho pono ʻia ka mea welding, a maikaʻi ka hana piha.
5. Māwae wela: ʻOi aku ka haʻahaʻa o ka ʻike o ka māwae wela ma mua o ke kila kila austenitic. ʻO kēia no ka mea ʻaʻole kiʻekiʻe ka nui o ka nickel, haʻahaʻa nā haumia e maʻalahi ke hana i ka eutectic haʻahaʻa-hoʻoheheʻe ʻia, ʻaʻole maʻalahi ka hana ʻana i ka ʻili wai me ka wahi hoʻoheheʻe haʻahaʻa, a ʻaʻole i loaʻa ka ulu wikiwiki o ka pōpilikia palaoa i nā mahana kiʻekiʻe.
6. Ka palupalu o ka ʻāpana i hoʻopilikia ʻia e ka wela: ʻO ka pilikia nui o ka hoʻopili ʻana o ka paipu kila kila duplex ʻo ia ka ʻāpana i hoʻopilikia ʻia e ka wela. Ma muli o ka hopena hoʻoluʻu wikiwiki o ka ʻāpana i hoʻopilikia ʻia e ka wela i ke kūlana kaulike ʻole o ke kaʻina hana hoʻopili wela, mālama mau ʻia ka ferrite i hoʻoluʻu ʻia, kahi e hoʻonui ai i ka ʻike o ka pala a me ka haki ʻana i hoʻokomo ʻia e ka hydrogen.
7. Ke kuʻi ʻana i ka metallurgy: I ka wā o ke kaʻina hana kuʻi ʻana o ke kila kila duplex, ma lalo o ka hana o ke kaʻapuni wela, ua loli ke ʻano microstructure a me ka ʻāpana i hoʻopilikia ʻia e ka wela o ka metala weld. I nā mahana kiʻekiʻe, hoʻoulu ʻia ka microstructure o ke kila kila duplex e ka ferrite a me ka austenite i ka wā e hoʻomaʻalili ai. Hoʻopilikia ʻia ka nui o ka ua austenite e nā kumu he nui.
Ka manawa hoʻouna: Iune-26-2023