Intsimbi engagqwaliyo ephindwe kabini inesakhiwo esincinci esinezigaba ezibini, apho iqhekeza levolumu ye-ferrite kunye ne-austenite limalunga ne-50%. Ngenxa yesakhiwo sayo esincinci esinezigaba ezibini, ezi ntsimbi zidibanisa iipropati ezilungileyo zeentsimbi ezingagqwaliyo ze-ferritic kunye ne-austenitic. Ngokubanzi, isigaba se-ferritic (i-lattice ye-cubic ephakathi komzimba) sibonelela ngamandla aphezulu oomatshini, ukuqina okuhle kunye nokumelana okuhle nokugqwala, ngelixa isigaba se-austenitic (i-lattice ye-cubic ephakathi kobuso) sibonelela ngokuguquguquka okuhle.
Ngenxa yokudibanisa ezi mpawu, iintsimbi ezingenasici ezimbini zisetyenziswa kakhulu kumashishini e-petrochemical, pulp kunye nephepha, ulwandle kunye namandla. Ziyakwazi ukumelana neemeko ezinzima, zandise ubomi benkonzo kwaye zisebenze kwiimeko ezinzima kakhulu zendalo.
Izixhobo ezinamandla aphezulu zinciphisa ubukhulu kunye nobunzima benxalenye. Umzekelo, intsimbi engagqwaliyo ene-super duplex inokubonelela ngamandla okuphuma kunye nokumelana nokugawulwa kwemingxuma okuphindwe kathathu ukuya kane kunentsimbi engagqwaliyo engama-316.
Iintsimbi eziqinileyo ezimbini zihlulwe zibe ziiklasi ezintathu ngokusekwe kumxholo we-gravimetric chromium (Cr) kunye nenani elilinganayo lokumelana nemingxuma (PREN):
Enye yezinto ezibalulekileyo zokuwelda i-DSS, i-SDSS, i-HDSS kunye neentsimbi ezikhethekileyo ze-alloy stainless steels kukulawula iiparameter zokuwelda.
Iimfuneko zenkqubo yokuwelda kwishishini le-petrochemical zichaza ubuncinci be-PREN obufunekayo kwiintsimbi zokuzalisa. Umzekelo, i-DSS ifuna ixabiso le-PREN elingama-35, ngelixa i-SDSS ifuna ixabiso le-PREN elingama-40. 1 ibonisa i-DSS kunye nentsimbi yayo yokuzalisa ehambelanayo ye-GMAW kunye ne-GTAW. Njengomthetho, umxholo we-Cr kwintsimbi yokuzalisa uhambelana nomxholo we-Cr kwisinyithi esisisiseko. Enye indlela ekufuneka uyiqwalasele xa usebenzisa i-GTAW kwiingcambu kunye nemijelo eshushu kukusebenzisa iintsimbi zokuzalisa ze-superalloy. Ukuba isinyithi sokuwelda asifani ngenxa yobuchule obuphantsi, isinyithi sokuzalisa esixutyiweyo kakhulu sinokubonelela nge-PREN efunekayo kunye namanye amaxabiso kwisampuli yokuwelda.
Umzekelo, ukubonisa oku, abanye abavelisi bacebisa ukusebenzisa i-SDSS (25% Cr) filler wire kwi-DSS (22% Cr) based alloys kunye ne-HDSS (27% Cr) filler wire kwi-SDSS (25% Cr) based alloys. I-HDSS filler wire ingasetyenziselwa ne-HDSS alloys. Le duplex ye-austenitic-ferritic iqulethe malunga ne-65% ​​ferrite, i-27% chromium, i-6.5% nickel, i-5% molybdenum kwaye ithathwa njengengaphantsi kwe-0.015% low carbon.
Xa kuthelekiswa ne-SDSS, ukupakisha kwe-HDSS kunamandla aphezulu okuvelisa kunye nokumelana okungcono nokugqwala kwemingxuma kunye ne-crevice. Kukwanokumelana okuphezulu nokuqhekeka koxinzelelo lwe-hydrogen kunye nokumelana okuphezulu kwiindawo ezine-asidi enamandla kune-SDSS. Amandla ayo aphezulu athetha ukuba iindleko zokugcina ziphantsi kwimveliso yepayipi, njengoko isinyithi se-weld esinamandla aneleyo singadingi uhlalutyo lwezinto ezilinganiselweyo kwaye iindlela zokwamkelwa zinokuba zincinci.
Ngenxa yoluhlu olubanzi lwezixhobo ezisisiseko, iimfuno zoomatshini kunye neemeko zokusebenza, nceda udibane nengcali ye-DSS kunye ne-filler metal application ngaphambi kokuba uqhubeke neprojekthi yakho elandelayo.
I-WELDER, eyayisakuba yi-Practical Welding Today, imele abantu bokwenene abenza iimveliso esizisebenzisayo nesisebenza ngazo yonke imihla. Le magazini ibikhonza uluntu oludibanisa iintsimbi eMntla Melika kangangeminyaka engaphezu kwama-20.
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