Kodi Duplex Steel ndi chiyani?

Chitsulo cha Duplex chimatanthawuza banja lazitsulo zosapanga dzimbiri zomwe zimakhala ndi magawo awiri a microstructure omwe ali ndi austenitic (nkhope ya nkhope ya cubic crystal structure) ndi ferritic (body-centered cubic crystal structure) magawo.Kapangidwe ka magawo awiriwa kumachitika kudzera mu kaphatikizidwe ka aloyi komwe kumaphatikizapo zinthu monga chromium, faifi tambala, molybdenum, ndi nayitrogeni.
Zitsulo zosapanga dzimbiri zodziwika bwino za duplex ndi za gulu la UNS S3XXX, pomwe "S" imayimira zosapanga dzimbiri, ndipo manambala amawonetsa nyimbo zina za aloyi.Magawo awiri a microstructure amapereka kuphatikiza kwa zinthu zofunika, kupanga duplex zitsulo zoyenera ntchito zosiyanasiyana.Zina mwazinthu zazikulu za duplex zitsulo ndi izi:
1.Kukaniza kwa Corrosion: Chitsulo cha Duplex chimapereka kukana kwa dzimbiri, makamaka m'malo ovuta omwe ali ndi ma chloride.Izi zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito popanga mankhwala, mafuta ndi gasi, komanso ntchito zam'madzi.
2.Kulimba Kwambiri: Poyerekeza ndi zitsulo zosapanga dzimbiri za austenitic, zitsulo za duplex zimakhala ndi mphamvu zowonjezereka, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsa ntchito pamene mphamvu zowonjezera zimafunikira.
3.Good Toughness and Ductility: Chitsulo cha Duplex chimakhala cholimba komanso chokhazikika, ngakhale kutentha kochepa.Kuphatikizika kwa zinthu kumeneku kumakhala kofunikira pakugwiritsa ntchito komwe zinthuzo zimatha kunyamula katundu ndi kutentha kosiyanasiyana.
4.Stress Corrosion Cracking Resistance: Chitsulo cha Duplex chimasonyeza kukana kwabwino kwa kupsinjika kwa corrosion cracking, mtundu wa dzimbiri umene ukhoza kuchitika pansi pa chikoka chophatikizana cha kupsinjika maganizo ndi malo owononga.
5.Zofunika Kwambiri: Ngakhale kuti zitsulo za duplex zingakhale zodula kuposa zitsulo zosapanga dzimbiri za austenitic, mawonekedwe ake ogwira ntchito nthawi zambiri amavomereza mtengo wake, makamaka m'mapulogalamu omwe kukana kwa dzimbiri ndi mphamvu ndizofunikira.
Mitundu yodziwika bwino yachitsulo chosapanga dzimbiri ya duplex imaphatikizapoduplex 2205 (UNS S32205)ndi duplex 2507 (UNS S32750).Maphunzirowa amagwiritsidwa ntchito kwambiri m'mafakitale monga kukonza mankhwala, kufufuza mafuta ndi gasi, uinjiniya wakunyanja ndi m'madzi, ndikupanga zamkati ndi mapepala.