Duplex bakin karfe yana da microstructure na zamani biyu, wanda adadin juzu'in ferrite da austenite kusan 50%. Saboda microstructure na kashi biyu, waɗannan karafa sun haɗu da mafi kyawun kaddarorin ferritic da austenitic bakin karfe. Gabaɗaya, lokaci na ferritic (cubic lattice mai tsaka-tsakin jiki) yana ba da ƙarfin injina mai ƙarfi, ƙarfi mai kyau da juriya mai kyau na lalata, yayin da lokaci na austenitic (cubic lattice mai fuskantar fuska) yana ba da kyakkyawar ductility.
Saboda haɗewar waɗannan kaddarorin, ana amfani da bakin karfe mai duplex a cikin masana'antar petrochemical, ɓangaren litattafan almara da takarda, marine da makamashi. Za su iya jure wa yanayi mai tsauri, tsawaita rayuwar sabis da aiki cikin matsanancin yanayi na muhalli.
Abubuwan da ke da ƙarfi suna rage kauri da nauyin sashi. Misali, super duplex bakin karfe iya samar da uku zuwa hudu da yawan amfanin ƙasa ƙarfi da pitting juriya na 316 bakin karfe.
Bakin Karfe Duplex an rarrabasu zuwa maki uku dangane da abun ciki na chromium (Cr) na gravimetric da lambar juriya daidai lamba (PREN):
Ɗaya daga cikin mahimman abubuwan walda DSS, SDSS, HDSS da bakin karfe na musamman shine sarrafa sigogin walda.
Abubuwan buƙatun don aikin walda a cikin masana'antar petrochemical suna ƙayyadad da mafi ƙarancin PREN da ake buƙata don ƙarafa mai filler. Misali, DSS na buƙatar ƙimar PREN na 35, yayin da SDSS na buƙatar ƙimar PREN na 40. 1 yana nuna DSS da madaidaicin karfen filler na GMAW da GTAW. A matsayinka na mai mulki, abun ciki na Cr a cikin karfen filler yayi daidai da abun ciki na Cr a cikin karfen tushe. Hanya daya da za a yi la'akari da ita yayin amfani da GTAW don tushen da tashoshi masu zafi shine amfani da karafa na filler superalloy. Idan ƙarfen weld ɗin ba shi da daidaituwa saboda fasaha mara kyau, ƙarfe mai cike da ƙari na iya samar da PREN da ake so da sauran ƙimar samfuran weld.
A matsayin misali, don nuna wannan, wasu masana'antun suna ba da shawarar amfani da SDSS (25% Cr) waya mai filler don DSS (22% Cr) tushen gami da HDSS (27% Cr) waya filler don SDSS (25% Cr). Hakanan za'a iya amfani da waya filler HDSS don gami da HDSS. Wannan duplex austenitic-ferritic ya ƙunshi kusan 65% ferrite, 27% chromium, 6.5% nickel, 5% molybdenum kuma ana ɗaukarsa ƙasa da 0.015% ƙananan carbon.
Idan aka kwatanta da SDSS, tattarawar HDSS yana da ƙarfin yawan amfanin ƙasa da mafi kyawun juriya ga lalatawa da ɓarna. Hakanan yana da tsayin juriya ga fashewar damuwa na hydrogen da juriya mai ƙarfi ga mahalli mai ƙarfi fiye da SSS. Ƙarfin sa yana nufin ƙananan farashin kulawa a cikin samar da bututu, kamar yadda ƙarfe mai ƙarfi na walda ba ya buƙatar nazarin ƙayyadaddun ƙayyadaddun abubuwa kuma ka'idojin karɓa na iya zama ƙasa da ra'ayin mazan jiya.
Dangane da kewayon kayan tushe, buƙatun inji da yanayin aiki, da fatan za a tuntuɓi DSS da ƙwararrun aikace-aikacen ƙarfe kafin ci gaba da aikinku na gaba.
WELDER, wanda a da ake kira Practical Welding Today, yana wakiltar ainihin mutanen da ke yin samfuran da muke amfani da su kuma suke aiki da su kowace rana. Wannan mujallar ta yi hidima ga al’ummar walda a Arewacin Amirka sama da shekaru 20.
Yanzu tare da cikakken damar yin amfani da bugu na dijital na FABRICATOR, samun sauƙin samun albarkatun masana'antu masu mahimmanci.
Buga na dijital na The Tube & Pipe Journal yanzu yana da cikakkiyar dama, yana ba da sauƙi ga albarkatun masana'antu masu mahimmanci.
Samun cikakken damar dijital zuwa Jaridar STAMPING, mai nuna sabbin fasaha, mafi kyawun ayyuka da labarai na masana'antu don kasuwar stamping karfe.
Yanzu tare da cikakken damar dijital zuwa The Fabricator en Español, kuna da sauƙin samun dama ga albarkatun masana'antu masu mahimmanci.