Duplex steel stainless

I-Duplex insimbi engenasici ineempawu ze-austenitic stainless steel kunye ne-ferritic stainless steel kuba ine-austenite + i-ferrite ye-dual phase structure kunye nomxholo wezigaba ezibini ezisisiseko ezifanayo. Amandla esivuno anokufikelela kwi-400Mpa ~ 550MPa, ephindwe kabini kuneyentsimbi eqhelekileyo ye-austenitic. Xa kuthelekiswa nentsimbi ye-ferritic stainless steel, i-duplex yensimbi engenasici inokuqina okuphezulu, ubushushu obuphantsi be-brittle transition, iphucule kakhulu ukuxhathisa kwe-intergranular corrosion kunye nokusebenza kwe-welding; ngelixa ugcina ezinye iimpawu zensimbi engenasici ye-ferritic, efana ne-475 ℃ brittleness, ubushushu Ukuqhuba okuphezulu, i-coefficient encinci yokwandisa i-linear, i-superplasticity kunye neempawu zemagneti. Xa kuthelekiswa ne-austenitic stainless steel, i-duplex steel stainless inamandla aphezulu, ngakumbi amandla emveliso aphuculwe kakhulu, kwaye ukuxhathisa kwe-corrosion pitting, ukumelana noxinzelelo lwe-corrosion, ukumelana nokudinwa kwe-corrosion kunye nezinye iipropathi nazo ziphuculwe kakhulu.

Iintsimbi ze-Duplex ezingenasici zihlelwa kwiindidi ezine: i-Cr18, i-Cr23 (ngaphandle kwe-Mo), i-Cr22 kunye ne-Cr25 ngokusekelwe kwimichiza yazo. Ngokuphathelele iCr25 duplex steel stainless, inokohlulwa ibe yintsimbi eqhelekileyo kunye ne-super duplex. Phakathi kwazo, iCr22 kunye neCr25 zisetyenziswa kakhulu. Uninzi lweentsimbi ze-duplex ezingenasici ezisetyenziswa eChina ziveliswa eSweden. Amabakala athile ngala: 3RE60 (Cr18 type), SAF2304 (Cr23 type), SAF2205 (Cr22 type), kunye ne-SAF2507 (Cr25 type).