Karfe mai siffar duplex bakin karfe yana da tsarin matakai biyu, wanda girmansa ya kai kusan kashi 50%. Saboda tsarin matakai biyu, waɗannan ƙarfen suna haɗa mafi kyawun halaye na ƙarfe mai siffar ferritic da austenitic bakin karfe. Gabaɗaya, tsarin ferritic (tsarin cubic mai siffar jiki) yana ba da ƙarfi mai ƙarfi, ƙarfi mai kyau da juriya ga tsatsa, yayin da tsarin austenitic (tsarin cubic mai siffar fuska) yana ba da kyakkyawan tsari.
Saboda haɗakar waɗannan kaddarorin, ana amfani da ƙarfe mai kauri biyu a masana'antar mai, ɓangaren litattafan almara da takarda, masana'antar ruwa da makamashi. Suna iya jure wa yanayi mai tsauri, tsawaita tsawon rai da kuma aiki a cikin yanayi mafi tsauri na muhalli.
Kayan aiki masu ƙarfi suna rage kauri da nauyin ɓangaren. Misali, ƙarfe mai ƙarfi duplex na iya samar da ƙarfin samarwa sau uku zuwa huɗu da juriyar ƙarfe 316 mai ƙarfi.
An rarraba ƙarfe masu duplex zuwa matakai uku dangane da abun ciki na gravimetric chromium (Cr) da lambar daidai da juriyar pitting (PREN):
Ɗaya daga cikin muhimman abubuwan da ke tattare da walda DSS, SDSS, HDSS da ƙarfe na musamman na ƙarfe mai ƙarfe shine kula da sigogin walda.
Bukatun aikin walda a masana'antar man fetur sun ƙayyade mafi ƙarancin PREN da ake buƙata don ƙarfen cikawa. Misali, DSS yana buƙatar ƙimar PREN ta 35, yayin da SDSS ke buƙatar ƙimar PREN ta 40. 1 yana nuna DSS da ƙarfen cikawa mai dacewa don GMAW da GTAW. A matsayinka na doka, abun ciki na Cr a cikin ƙarfen cikawa ya yi daidai da abun ciki na Cr a cikin ƙarfen tushe. Hanya ɗaya da za a yi la'akari da ita lokacin amfani da GTAW don tushen da tashoshin zafi ita ce amfani da ƙarfen cikawa mai ƙarfi. Idan ƙarfen walda bai yi kama da juna ba saboda rashin kyawun dabara, ƙarfen cikawa mai yawa zai iya samar da PREN da ake so da sauran ƙimar samfurin walda.
Misali, domin nuna wannan, wasu masana'antun sun ba da shawarar amfani da wayar cika SDSS (25% Cr) don ƙarfe masu tushen DSS (22% Cr) da kuma wayar cika HDSS (27% Cr) don ƙarfe masu tushen SDSS (25% Cr). Haka kuma ana iya amfani da wayar cika HDSS don ƙarfe masu tushen HDSS. Wannan duplex na austenitic-ferritic ya ƙunshi kusan ferrite 65%, 27% chromium, 6.5% nickel, 5% molybdenum kuma ana ɗaukarsa ƙasa da 0.015% ƙarancin carbon.
Idan aka kwatanta da SDSS, shirya HDSS yana da ƙarfin yawan amfanin ƙasa da kuma juriya ga tsatsa da kuma tsatsa mai zurfi. Hakanan yana da juriya ga tsatsa da kuma juriya ga yanayin acidic mai ƙarfi fiye da SDSS. Babban ƙarfinsa yana nufin ƙarancin farashin kulawa a samar da bututu, kamar yadda ƙarfe mai ƙarfi mai ƙarfi ba ya buƙatar nazarin abubuwa masu iyaka kuma sharuɗɗan karɓuwa na iya zama ƙasa da na al'ada.
Ganin yawan kayan tushe, buƙatun injina da yanayin aiki, da fatan za a tuntuɓi ƙwararren mai amfani da DSS da ƙarfe kafin a ci gaba da aikinku na gaba.
WELDER, wanda a da ake kira Practical Welding Today, yana wakiltar ainihin mutanen da ke yin kayayyakin da muke amfani da su da kuma waɗanda muke aiki da su kowace rana. Wannan mujallar ta shafe sama da shekaru 20 tana yi wa al'ummar walda hidima a Arewacin Amurka.
Yanzu tare da cikakken damar shiga bugu na dijital na FABRICATOR, samun damar zuwa albarkatun masana'antu masu mahimmanci cikin sauƙi.
Bugun dijital na Jaridar The Tube & Pipe yanzu ya zama cikakke, wanda ke ba da damar samun albarkatu masu mahimmanci a masana'antu cikin sauƙi.
Samu cikakken damar shiga Mujallar STAMPING ta dijital, wacce ke nuna sabbin fasahohi, mafi kyawun ayyuka da labaran masana'antu don kasuwar buga ƙarfe.
Yanzu da cikakken damar shiga cikin fasahar zamani ta Intanet, kuna da sauƙin samun albarkatun masana'antu masu mahimmanci.