I-Duplex insimbi engenasici ine-microstructure yesigaba sesibini apho iqhekeza levolumu ye-ferrite kunye ne-austenite malunga ne-50%.Ngenxa ye-microstructure yabo yesigaba sesibini, ezi zintsimbi zidibanisa iimpawu ezintle ze-ferritic kunye ne-austenitic stainless steels. Ngokubanzi, isigaba se-ferrite (i-cubic-centered body-centered lattice) inikeza ukuchasana kwesigaba se-cubic kunye ne-austin-centered, i-cubicor ephezulu, i-cubic, i-cubic, i-cubic, i-cubic, i-cubic, i-acne, i-cubic, i-acne, i-cubic, i-cubic, i-acne, i-cubic, i-cubic, i-cubic, i-acne, i-cubic, i-cubic, i-acne, i-cubic, i-cubic okanye i-cubic-lattice. c lattice) ibonelela nge-ductility elungileyo.
Ukudityaniswa kwezi zakhiwo kungenxa yokuba i-duplex i-stainless steels isetyenziswa ngokubanzi kwi-petrochemical, i-pulp kunye nephepha, i-marine kunye nemveliso yokuvelisa amandla ombane.Ziyakwazi ukumelana neendaba ezitshabalalisayo, zandise ixesha lenkonzo, kwaye zisebenze kwiimeko ezinzima kakhulu zokusingqongileyo.
Izinto eziphezulu zokuqina zikuvumela ukuba unciphise ubukhulu benxalenye kunye nobunzima.Ngokomzekelo, i-super duplex insimbi engenasici inokubonelela ngokuphindwe kathathu ukuya kwamane amandla aphezulu esivuno kunye nokuchasana okuphezulu kwi-corrosion ye-pitting ngaphezu kwe-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-petrochemical industry welding process zinquma ubuncinci bexabiso le-PREN elifunekayo kwi-filler metals.Ngokomzekelo, i-DSS idinga i-PREN ye-35 kunye ne-SDSS idinga i-PREN ye-40.Umfanekiso we-1 ubonisa i-DSS kunye nentsimbi yayo ehambelanayo yokuzalisa i-GMAW kunye ne-GTAW.Ngokuqhelekileyo, umxholo we-Cr we-filler metal uya kufana neyokuqhelanisa i-root ye-root ye-root kunye ne-GTA i-root ye-root yokusetyenziswa xa i-root isetyenziselwa ukuqwalasela i-root ye-metals. Ukuba intsimbi ye-weld ayifani ngenxa yendlela engafanelekanga, isinyithi esifakwe ngaphezulu kwe-alloyed singabonelela nge-PREN efunwayo kunye namanye amaxabiso kwisampulu edibeneyo.
Njengomzekelo wokubonisa oku, abanye abavelisi batusa ukusebenzisa i-SDSS yocingo yokuzalisa (25% Cr) ye-DSS-based alloys (22% Cr), kunye ne-HDSS filler wire (27% Cr) kwi-SDSS (25% Cr) i-alloys esekwe kwi-alloys esekelwe kwi-HDSS, ungasebenzisa kwakhona i-HDSS filler wire. i-chromium, i-6.5% ye-nickel, 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.Ikwanokuchasana okuphezulu kwi-hydrogen-induced stress cracking kunye nokuchasana okuphezulu kwiindawo ezine-acidic enamandla kune-SDSS.
Ngenxa yoluhlu olubanzi lwezinto ezisisiseko, iimfuno zoomatshini kunye neemeko zenkonzo, nceda ucinge ngokubonisana nesicelo se-DSS kunye neengcali zetsimbi yokuzalisa ngaphambi kokuba uqalise iprojekthi yakho elandelayo.
I-WELDER, eyayisakuba yi-Practical Welding Today, ibonisa abantu bokwenene abenza iimveliso esizisebenzisayo nesisebenza ngazo yonke imihla.Eli phephancwadi liye lanceda abantu baseMntla Merika iminyaka engaphezu kwama-20.
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