Chitsulo chosapanga dzimbiri chili ndi kapangidwe ka magawo awiri, momwe gawo la voliyumu la ferrite ndi austenite lili pafupifupi 50%. Chifukwa cha kapangidwe kake ka magawo awiri, zitsulozi zimaphatikiza bwino kwambiri zitsulo zosapanga dzimbiri za ferritic ndi austenitic. Kawirikawiri, gawo la ferritic (lattice ya cubic centered body-centered) limapereka mphamvu zambiri zamakaniko, kulimba bwino komanso kukana dzimbiri, pomwe gawo la austenitic (lattice ya cubic centered face-centered) limapereka ductility yabwino.
Chifukwa cha kuphatikiza kwa zinthu zimenezi, zitsulo zosapanga dzimbiri ziwiri zimagwiritsidwa ntchito kwambiri m'mafakitale a petrochemical, pulp ndi pepala, zam'madzi ndi zamagetsi. Zitha kupirira malo ovuta, kukulitsa nthawi yogwira ntchito komanso kugwira ntchito m'malo ovuta kwambiri.
Zipangizo zolimba kwambiri zimachepetsa makulidwe ndi kulemera kwa gawolo. Mwachitsanzo, chitsulo chosapanga dzimbiri cha super duplex chingapereke mphamvu yochulukitsa katatu kapena kanayi kuposa chitsulo chosapanga dzimbiri cha 316.
Zitsulo zosapanga dzimbiri ziwiri zimagawidwa m'magulu atatu kutengera kuchuluka kwa chromium (Cr) ndi kuchuluka kwa ma pitting resistance (PREN):
Chimodzi mwa zinthu zofunika kwambiri pakuweda DSS, SDSS, HDSS ndi zitsulo zosapanga dzimbiri zapadera za alloy ndikuwongolera magawo a welding.
Zofunikira pa njira yowotcherera mumakampani opanga mafuta zimatengera PREN yocheperako yomwe imafunika pa zitsulo zodzaza. Mwachitsanzo, DSS imafuna PREN ya 35, pomwe SDSS imafuna PREN ya 40. 1 ikuwonetsa DSS ndi chitsulo chodzaza chomwe chikugwirizana nacho cha GMAW ndi GTAW. Nthawi zambiri, kuchuluka kwa Cr mu chitsulo chodzaza kumagwirizana ndi kuchuluka kwa Cr mu chitsulo choyambira. Njira imodzi yoganizira mukamagwiritsa ntchito GTAW pa mizu ndi njira zotentha ndikugwiritsa ntchito zitsulo zodzaza za superalloy. Ngati chitsulo chosungunula sichili chofanana chifukwa cha njira yolakwika, chitsulo chosungunula chopangidwa mopitirira muyeso chingapereke PREN yomwe mukufuna ndi zina zomwe zili pa chitsanzo cha weld.
Mwachitsanzo, pofuna kusonyeza izi, opanga ena amalimbikitsa kugwiritsa ntchito waya wodzaza wa SDSS (25% Cr) pa ma alloy a DSS (22% Cr) ndi waya wodzaza wa HDSS (27% Cr) pa ma alloy a SDSS (25% Cr). Waya wodzaza wa HDSS ungagwiritsidwenso ntchito pa ma alloy a HDSS. Duplex iyi ya austenitic-ferritic ili ndi pafupifupi 65% ​​ferrite, 27% chromium, 6.5% nickel, 5% molybdenum ndipo imaonedwa kuti ndi yotsika kuposa 0.015%.
Poyerekeza ndi SDSS, kulongedza kwa HDSS kuli ndi mphamvu yochuluka yokolola komanso kukana dzimbiri la dzenje ndi ming'alu. Kulinso ndi mphamvu yolimba kwambiri yolimbana ndi kusweka kwa hydrogen komanso kukana kwambiri malo okhala ndi asidi wambiri kuposa SDSS. Mphamvu yake yayikulu imatanthauza kuti ndalama zochepa zosamalira popanga mapaipi ndi zosungunulira, chifukwa chitsulo chosungunulira champhamvu chokwanira sichifuna kusanthula kwa zinthu zochepa ndipo njira zovomerezeka sizingakhale zosamala kwambiri.
Popeza pali mitundu yosiyanasiyana ya zipangizo zoyambira, zofunikira pamakina, komanso momwe zimagwirira ntchito, chonde funsani katswiri wa DSS ndi filler metal musanapitirize ndi ntchito yanu yotsatira.
WELDER, yomwe kale inkatchedwa Practical Welding Today, ikuyimira anthu enieni omwe amapanga zinthu zomwe timagwiritsa ntchito komanso zomwe timagwira ntchito nazo tsiku lililonse. Magaziniyi yakhala ikutumikira anthu osokera ku North America kwa zaka zoposa 20.
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