Insimbi engagqwali e-Duplex inezici zensimbi engagqwali ye-austenitic kanye nensimbi engagqwali ye-ferritic ngoba inesakhiwo sesigaba esikabili se-austenite + ferrite futhi okuqukethwe kwezakhiwo zezigaba ezimbili kuyafana. Amandla okukhiqiza angafinyelela ku-400Mpa ~ 550MPa, okuyisilinganiso esiphindwe kabili kunasensimbi evamile ye-austenitic engagqwali. Uma kuqhathaniswa nensimbi engagqwali ye-ferritic, insimbi engagqwali eyi-duplex inokuqina okuphezulu, izinga lokushisa eliphansi le-brittle transition, lithuthukise kakhulu ukumelana nokugqwala kwe-intergranular kanye nokusebenza kokushisela; ngenkathi igcina ezinye izici zensimbi engagqwali ye-ferritic, efana no-475 ℃ brittleness, ukushisa Ukuhamba okuphezulu, i-coefficient encane yomugqa wokunweba, i-superplasticity kanye nezakhiwo kazibuthe. Uma kuqhathaniswa nensimbi engagqwali ye-austenitic, insimbi engagqwali eyi-duplex inamandla aphezulu, ikakhulukazi amandla okukhiqiza athuthukiswa kakhulu, futhi ukumelana nokugqwala kwe-pitting, ukumelana nokugqwala kwengcindezi, ukumelana nokukhathala kokugqwala nezinye izakhiwo nakho kuye kwathuthuka kakhulu.
Izinsimbi ezingenasici ezi-Duplex zihlukaniswa ngezinhlobo ezine: i-Cr18, i-Cr23 (ngaphandle kwe-Mo), i-Cr22 ne-Cr25 ngokusekelwe ekwakhekeni kwamakhemikhali awo. Ngokuqondene ne-Cr25 duplex insimbi engagqwali, ingahlukaniswa ibe insimbi engagqwali evamile kanye ne-super duplex. Phakathi kwazo, i-Cr22 ne-Cr25 isetshenziswa kakhulu. Iningi lezinsimbi ezingenasici eziyi-duplex ezisetshenziswa eChina zikhiqizwa eSweden. Amabanga athile yilawa: 3RE60 (Cr18 uhlobo), SAF2304 (Cr23 uhlobo), SAF2205 (Cr22 uhlobo), kanye SAF2507 (Cr25 uhlobo).
Isikhathi sokuthumela: Jan-19-2020