1. Ka lua o ka hanauna o duplex kila kuhiliʻole kila paipu i nā 'ano o ka ultra-haʻahaʻa kalapona, haʻahaʻa naikokene, typical haku mele Cr5% Ni0.17%n a me 2205 kiʻekiʻe nitrogen maʻiʻo ma mua o ka mua o ka duplex kila kuhiliʻole kila paipu, e hoʻomaikaʻi. ke kū'ē i ka corrosion koʻikoʻi a me ke kūʻē pitting o ka media acidic me ke kiʻekiʻe o ka chloride ion concentration.ʻO ka Nitrogen kahi mea hana austenite ikaika.ʻO ka hoʻohui ʻana o ka nitrogen i ka duplex stainless steel ʻaʻole wale ka hoʻomaikaʻi ʻana i ka plasticity a me ka paʻakikī o ke kila me ka ʻike ʻole o ka pōʻino, akā e hoʻomaikaʻi pū i ka ikaika o ke kila, a ke kāohi nei i ka ua a me ka lohi o ka carbide.
2. Ka hana hoʻonohonoho: I loko o ka hale kōmaena, austenite a me ka ferrite moʻolelo no ka hapalua o ka hopena paʻa, nona nā ʻano o ka hoʻolālā biphase.Hoʻopaʻa ia i nā hiʻohiʻona o ka liʻiliʻi o ka ferritic stainless steel conductors, ke kū'ē i ka pitting, ka māhā a me ka chloride stress corrosion, me ka paʻakikī maikaʻi, ka haʻahaʻa haʻahaʻa embrittlement, ke kū'ē i ka intergranular corrosion a me nā waiwai mechanical a me ka weldability maikaʻi.
3. Ma lalo o ka like puʻe papa kūlana hiki ke hoola i na mea, i ka hua ikaika a me ka stress corrosion kū'ē o duplex kila kuhiliʻole paipu mea aneane 1 manawa o austenitic kuhiliʻole kila, ka laina hoʻonui coefficient emi ma mua o ka austenitic kuhiliʻole kila o ka austenitic kuhiliʻole. ʻōnaehana kila, a ʻo ke kila kalapona haʻahaʻa kokoke iā ia.ʻAʻole maikaʻi ka hana anu anuanu e like me ka austenitic stainless steel.
4. Weldability: duplex kila kuhiliʻole kila paipu 2205 maikaʻi weldability, kuʻi anuanu, wela māwae ka sensitivity mea uuku, maʻamauʻaʻole preheating ma mua o kuʻiʻo,ʻaʻohe wela lapaʻau ma hope o wili.Ma muli o ka liʻiliʻi liʻiliʻi o ka ferrite hoʻokahi-phase a me ke kiʻekiʻe o ka nitrogen ma ka wahi i hoʻopili ʻia i ka wela, hiki ke hoʻomalu ʻia ka ikehu uea kuʻi i kēia manawa ke koho pono ʻia ka mea kuʻi, a maikaʻi ka hana piha.
5. ʻO ka māwae wela: ʻOi aku ka haʻahaʻa 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 i maʻalahi e hana i ka eutectic haʻahaʻa hoʻoheheʻe haʻahaʻa, ʻaʻole maʻalahi ke kiʻi wai me ka helu hoʻoheheʻe haʻahaʻa, a ʻaʻole i maʻalahi ka ulu wikiwiki ʻana o ka pōʻino palaoa ma ke kiʻekiʻe. nā mahana wela.
6. ʻO ka brittleness o ka wela i hoʻopili ʻia: ʻO ka pilikia nui o ka hoʻoheheʻe ʻana o ka paipu kila kuhiliʻole duplex ʻo ia ka ʻāpana wela.Ma muli o ka wikiwiki hoʻoluʻu hopena o ka wela i hoʻopili ʻia i loko o ka mokuʻāina non-equilibrium o ka pōʻai wela welding, ʻoi aku ka nui o ka ferrite i hoʻomaʻamaʻa mau ʻia, kahi e hoʻonui ai i ka naʻau o ka corrosion a me ka hydrogen-induced cracking.
7. Welding metallurgy: I ka wā o ke kaʻina hana hoʻoheheʻe ʻana o ka duplex stainless steel, ma lalo o ka hana o ka thermal cycling, ua hoʻololi ʻia ka microstructure a me ka wela wela o ka weld metala.I nā wela kiʻekiʻe, ua hoʻoheheʻe ʻia ka microstructure o ka duplex stainless steel e ka ferrite a me ka austenite i ka wā hoʻoilo.Hoʻopili ʻia ka nui o ka ua austenite e nā kumu he nui.
Ka manawa hoʻouna: Iune-26-2023