Emkhakheni wesayensi yezinto zokwakha, uhlobo olusha lwensimbi engagqwali olwaziwa nge-duplex stainless steel lenza amagagasi.Le alloy ephawulekayo inesakhiwo esiyingqayizivele, nesigaba se-ferrite kanye nesigaba se-austenite ngayinye ibalwa ingxenye yesakhiwo sayo esiqinile.Okuhlaba umxhwele nakakhulu ukuthi okuqukethwe kwesigaba esincane kungafinyelela ku-30%.
I-Duplex insimbi engagqwali ibonisa izakhiwo ezinhle kakhulu zemishini ngenxa yezigaba zayo ezimbili.Ngokuqukethwe kwekhabhoni ephansi, okuqukethwe kwe-chromium kusuka ku-18% kuya ku-28%, kuyilapho okuqukethwe kwe-nickel kumi phakathi kuka-3% no-10%.Ngaphezu kwalezi zingxenye ezibalulekile, izinhlobo ezithile zensimbi engagqwali e-duplex nazo zihlanganisa izakhi ze-alloying ezifana ne-molybdenum (Mo), ithusi (Cu), i-niobium (Nb), i-titanium (Ti), ne-nitrogen (N).
Isici esiyingqayizivele sale nsimbi silele eqinisweni lokuthi ihlanganisa izimfanelo ezinhle kakhulu zombili izinsimbi ezingenasici ze-austenitic kanye ne-ferritic.Ngokungafani nozakwabo we-ferrite, insimbi engagqwali eyi-duplex inepulasitiki ephakeme nokuqina.Ukwengeza, ikhombisa ukumelana okumangalisayo nokuqhekeka kokugqwala kwengcindezi, okuyenza ifiseleke kakhulu ezinhlelweni ezahlukahlukene.
Isici esisodwa esibalulekile esihlukanisa insimbi engagqwali eyi-duplex ukumelana kwayo nokugqwala kwemigodi, okuwuhlobo olujwayelekile lokugqwala okuhlangatshezwana nalo ezindaweni ezinokhahlo njengezimboni zasolwandle nezicubungula amakhemikhali.Lokhu kumelana nokugqwala kungase kubangelwe ekuphakameni kwe-chromium kwengxubevange nokuqukethwe kwe-molybdenum uma kuqhathaniswa nezinsimbi zendabuko ezingenasici.
I-microstructure eyingqayizivele ye-duplex insimbi engagqwali ithuthukisa ukuqina kwayo, iyenze ifanelekele uhla olubanzi lwezinhlelo zokusebenza.Ithola ukusetshenziswa okubanzi ezimbonini ezidinga izinto eziqinile nezimelana nokugqwala, okuhlanganisa ukuhlola uwoyela negesi ogwini lolwandle, izimboni zokukhipha usawoti emanzini, ukucubungula amakhemikhali, nengqalasizinda yezokuthutha.
Ngaphezu kwalokho, amandla aphezulu ale nsimbi enza imiklamo elula futhi engabizi kakhulu, okuvumela izimboni ukuba zithole ukusebenza kahle okukhulu.Ukumelana kwayo okungavamile nokugqwala kwendawo kuqinisekisa ukuphila okude kwemishini nezakhiwo, kunciphisa izindleko zokuyilungisa ngokuhamba kwesikhathi.
Eminyakeni yakamuva, isidingo se-duplex insimbi engagqwali sibone ukwanda okukhulu, lapho abakhiqizi bethuthukisa amamaki amasha ukuze bahlangabezane nezinhlelo zokusebenza ezahlukahlukene.Lezi ntuthuko zihlose ukuthuthukisa izakhiwo ezifana nokungagqwala, amandla, nokushisela, kuqhubeke nokwandisa ububanzi bokusetshenziswa kwensimbi.
Ngocwaningo oluqhubekayo nokuthuthukiswa, ikusasa le-duplex stainless steel libukeka lithembisa.Ososayensi nonjiniyela bayaqhubeka nokuhlola izindlela zokuthuthukisa izici zayo nokwandisa ukusebenza kwayo ezimbonini ezihlukahlukene.
Njengoba izimboni zilwela ukwenza izinto ezisimeme, insimbi engagqwali eyi-duplex inikeza isixazululo esisebenzayo ngenxa yokuphila isikhathi eside, ukugaywa kabusha, kanye nesidingo esincishisiwe sokunakekelwa.Lesi sici esihambisana nemvelo siyibeka njengembangi enkulu emjahweni wezinto ezisimeme.
Kafushane, insimbi engagqwali eyi-duplex imele impumelelo emangalisayo kusayensi yezinto ezibonakalayo, ehlanganisa izici ezinhle kakhulu zezinsimbi ezingenasici ze-austenitic ne-ferritic.Ngezakhiwo zayo ezihlukile zokumakhenikha, ukumelana nezinhlobo ezihlukahlukene zokugqwala, kanye nesidingo esikhulayo kuzo zonke izimboni, le ngxubevange emisha isilungele ukuguqula indlela esibhekana ngayo nemiklamo yesakhiwo kanye nokusebenza kwezimboni.
Isikhathi sokuthumela: Jul-18-2023