Duplex Stainless Steel Castings

Duplex Stainless Steel(DSS) e bua ka sehlopha sa tšepe e sa hloekang e nang le metallographic microstructure ea ferrite le austenite e 'ngoe le e' ngoe e etsang karolo ea 50%. Ka kakaretso, litaba tsa mekhahlelo e fokolang li hloka bonyane 30%. Tabeng ea khabone e tlaase, Cr content ke 18% ho 28%, 'me Ni content ke 3% ho 10%. Litšepe tse ling tsa duplex li boetse li na le likarolo tsa alloying tse kang Mo, Cu, Nb, Ti, le N. DSS e na le litšobotsi tsa tšepe e sa hloekang ea austenitic le ferritic. Ha e bapisoa le ferrite, e na le polasetiki e phahameng le ductility, ha e na mocheso oa mocheso oa kamore, 'me e ntlafalitse haholo ho hanyetsa ho bola ha intergranular le ts'ebetso ea welding, ha e ntse e boloka brittleness, conductivity e phahameng ea mocheso, le superplasticity e le tšepe e sa hloekang ea ferrite. Ha ho bapisoaaustenitic tšepe e sa hloekang, DSS e na le matla a phahameng 'me e ntlafalitse haholo khanyetso ea intergranular corrosion le chloride stress corrosion. Tšepe e sa hloekang ea Duplex e na le khanyetso e ntle ea pitting corrosion hape ke tšepe e bolokang nickel. Likerese tse fumanehang tsa tšepe e sa hloekang ea duplex e lahliloeng ke ho lahleheloa ke boka ba matsete a lichelete : 1.4460, 1.4462, 1.4468, 1.4469, 1.4517, 1.4770, A 890 1C, A 890 1A, A 890, A 8 A 8 A 8 A 8 A 8 A 9, A 8 A 9, A 9 A 9, 8 A 9, 8 A 9, 8 A 9, 8 A 9, 9 A 9 A 8, 9 A 9, 8 A 9. 995 1B, A 995 4A, A 995 5A, 2205, 2507, 022Cr22Ni5Mo3N, 022Cr25Ni6Mo2N