I-Duplex insimbi engenasici ine-microstructure yesigaba sesibini, apho i-fraction ye-volume ye-ferrite kunye ne-austenite i malunga ne-50%. Ngenxa ye-microstructure yabo yesigaba ezibini, ezi zintsimbi zidibanisa iipropathi ezilungileyo ze-ferritic kunye ne-austenitic stainless steels. Ngokubanzi, isigaba se-ferritic (i-cubic lattice egxininiswe kumzimba) inika amandla aphezulu omatshini, ukuqina okulungileyo kunye nokuchasana kokubola, ngelixa isigaba se-austenitic (i-cubic lattice ejongene nobuso) inika i-ductility efanelekileyo.
Ngenxa yokudityaniswa kwezi zakhiwo, i-duplex stainless steels isetyenziswa kakhulu kwi-petrochemical, i-pulp kunye nephepha, i-marine kunye ne-energy industry. Banokumelana nemekobume enzima, bandise ubomi benkonzo kwaye basebenze kwiimeko ezinzima kakhulu zokusingqongileyo.
Izinto eziphezulu zamandla zinciphisa ubukhulu kunye nobunzima benxalenye. Ngokomzekelo, i-super duplex steel stainless inokubonelela ngokuphindwe kathathu ukuya kwezine amandla emveliso kunye nokuchasana kwe-pitting ye-316 yensimbi engenasici.
Iintsimbi ezingenazintsimbi eziDuplex zihlelwa ngokwamabakala amathathu ngokusekwe kumxholo wegravimetric chromium (Cr) kunye nenombolo elinganayo yokuchasa imingxuma (PREN):
Enye yezinto eziphambili ze-welding DSS, i-SDSS, i-HDSS kunye neentsimbi ezikhethekileyo ze-alloy stainless steels kukulawula iiparitha ze-welding.
Iimfuno zenkqubo ye-welding kwi-petrochemical industry ichaza ubuncinci be-PREN obufunekayo kwiintsimbi zokuzalisa. Ngokomzekelo, i-DSS idinga ixabiso le-PREN le-35, ngelixa i-SDSS idinga ixabiso le-PREN le-40. I-1 ibonisa i-DSS kunye ne-metal filler ehambelanayo ye-GMAW kunye ne-GTAW. Njengomthetho, umxholo we-Cr kwi-filler metal uhambelana nomxholo we-Cr kwisiseko sesinyithi. Enye indlela yokuqwalasela xa usebenzisa i-GTAW yeengcambu kunye nemijelo eshushu kukusetyenziswa kweentsimbi zokuzalisa i-superalloy. Ukuba intsimbi ye-weld ayinanto yanto ngenxa yendlela engalunganga, isinyithi esifakwe ngaphezulu kwe-alloyed sinokubonelela nge-PREN efunwayo kunye namanye amaxabiso omzekelo we-weld.
Njengomzekelo, ukubonisa oku, abanye abavelisi batusa ukusebenzisa i-SDSS (25% Cr) i-filler wire ye-DSS (22% Cr) i-alloys esekelwe kunye ne-HDSS (27% Cr) i-filler wire ye-SDSS (25% Cr) i-alloys esekelwe. I-HDSS yocingo yokuzalisa ingasetyenziselwa i-alloys ye-HDSS. Le duplex ye-austenitic-ferritic iqulethe malunga ne-65% ye-ferrite, i-27% ye-chromium, i-nickel engu-6.5%, i-5% ye-molybdenum kwaye ithathwa njengengaphantsi kwe-0.015% yekhabhoni ephantsi.
Xa kuthelekiswa ne-SDSS, ukupakishwa kwe-HDSS kunamandla aphezulu esivuno kunye nokuchasana okungcono kwi-pitting kunye ne-crevice corrosion. Ikwanayo nokumelana okuphezulu koxinzelelo lwehydrogen yokuqhekeka kunye nokuchasana okuphezulu kwiindawo ezineasidi enamandla kune-SDSS. Amandla alo aphezulu athetha iindleko eziphantsi zokugcinwa kwimveliso yombhobho, njengoko intsimbi ye-weld yamandla aneleyo ayifuni uhlalutyo lwezinto ezinomda kunye neendlela zokumkela zingagcinwa ngaphantsi.
Ukunikezelwa koluhlu olubanzi lwezinto ezisisiseko, iimfuno zoomatshini kunye neemeko zokusebenza, nceda uqhagamshelane ne-DSS kunye ne-filler metal application specialist ngaphambi kokuba uqhubeke neprojekthi yakho elandelayo.
I-WELDER, eyayifudula ibizwa ngokuba yi-Practical Welding Today, imele abantu bokwenene abenza iimveliso esizisebenzisayo nesisebenza ngazo yonke imihla. Eli phephancwadi belisoloko linceda abantu abadibanisa iintsimbi kuMntla Merika ngaphezu kweminyaka engama-20.
Ngoku ngokufikelela ngokupheleleyo kushicilelo lwedijithali lweFABRICATOR, ufikelelo olulula kwimithombo yoshishino oluxabisekileyo.
Uhlelo lwedijithali lweThe Tube & Pipe Journal ngoku lufikeleleka ngokupheleleyo, lubonelela ngokufikelela lula kwizixhobo ezixabisekileyo zoshishino.
Fumana ufikelelo olupheleleyo lwedijithali kwi-STAMPING Journal, ebonisa itekhnoloji yamva nje, ezona zenzo zibalaseleyo kunye neendaba zeshishini lentengiso yesitampu sesinyithi.
Ngoku ngokufikelela ngokupheleleyo kwedijithali kwi-Fabricator en Español, unokufikelela ngokulula kwizixhobo ezixabisekileyo zoshishino.