Izingqinamba Eziyisishiyagalolunye Ezinkulu ku-Stainless Steel Welding
1. Iyini insimbi engagqwali kanye nensimbi engagqwali engamelana ne-asidi?
Impendulo: Okuqukethwe kwesici esiyinhloko "i-chromium" ezintweni zensimbi (ngokwengezwa kwezinye izakhi ezifana ne-nickel ne-molybdenum) kungenza insimbi ibe yisimo sokwenziwa futhi ibe nezici ezingenasici. Insimbi engazweli kwi-asidi isho insimbi ekwazi ukumelana nokugqwala emithonjeni eqinile egqwalayo njenge-asidi, i-alkali, nosawoti.
2. Iyini insimbi engagqwali ye-austenitic? Yimaphi amamaki asetshenziswa kakhulu?
Impendulo: Insimbi engagqwali ye-Austenitic iyona esetshenziswa kakhulu futhi inezinhlobonhlobo ezinkulu kakhulu. Ngokwesibonelo:
18-8 uchungechunge: 0Cr19Ni9 (304) 0Cr18Ni8 (308)
18-12 uchungechunge: 00Cr18Ni12Mo2Ti (316L)
25-13 uchungechunge: 0Cr25Ni13 (309)
25-20 uchungechunge: 0Cr25Ni20, njll
3. Kungani kunezinga elithile lobunzima bezobuchwepheshe ekushiseleni insimbi engagqwali?
Impendulo: Ubunzima benqubo enkulu yilokhu:
1)Impahla yensimbi engagqwali inokuzwela okuqinile kokushisayo, okunesikhathi sokuhlala esithe ukude kancane kububanzi bokushisa obungu-450-850 ℃, okuholela ekwehleni okuphawulekayo kokumelana nokugqwala kwamashisela nezindawo ezithinteke ekushiseni.
I-2) Ijwayele ukuqhekeka okushisayo.
3) Ukuvikelwa okungalungile kanye ne-oxidation eqinile yezinga lokushisa eliphezulu.
4)I-coefficient yokunwetshwa komugqa inkulu, okuholela ekuwohlokeni okubalulekile kokushisela.
4. Kungani kudingeka izinyathelo zenqubo ezisebenzayo zokushisela insimbi engagqwali ye-austenitic?Impendulo: Izinyathelo ezijwayelekile zenqubo zihlanganisa:
I-1) Khetha ngokuqinile izinto zokushisela ngokusekelwe ekwakhiweni kwamakhemikhali wezinto eziyisisekelo.
2) Small zamanje, Quick Welding; Amandla kalayini omncane anciphisa okokufaka ukushisa.
3) Intambo yokushisela enobubanzi obuncane kanye ne-electrode, ingajingi, i-multi-layer kanye ne-multi pass welding.
4) Ukupholisa okuphoqelekile kwama-welds kanye nezindawo ezithintekile zokushisa ukunciphisa isikhathi sokuhlala ku-450-850 ℃.
I-5) Ukuvikelwa kwe-TIG ye-welding seam emuva kwe-argon.
6)I-weld seam lapho ithintana nendawo ebolayo igcina ishiselwe.
I-7) Ukwelashwa kwe-Passivation yama-welds nezindawo ezithintekile ukushisa.
5. Kungani kudingekile ukusebenzisa i-25-13 series welding wire kanye ne-electrode ukushisela i-austenitic stainless steel, carbon steel, ne-low-alloy steel (insimbi yokushisela okuhlukile)?
Impendulo: Ekushiseleni amajoyinti ensimbi ahlukene axhuma insimbi engagqwali ye-austenitic nensimbi ye-carbon ne-low-alloy steel, insimbi efakiwe ye-weld kumele isebenzise izintambo zokushisela ezingu-25-13 (309, 309L) nezinduku zokushisela (Ao312, Ao307, njll.) . Uma kusetshenziswa ezinye izinto zokushisela insimbi engagqwali, isakhiwo se-martensitic sizokhiqizwa emgqeni wokuhlanganisa we-carbon steel kanye ne-low-alloy steel, okuzoholela ekuqhekekeni okubandayo.
6. Kungani igesi evikelayo engu-98% Ar+2% O2 isetshenziselwa insimbi yokushisela yensimbi engagqwali eqinile?
Impendulo: Uma usebenzisa i-MIG welding yensimbi eqinile yensimbi engagqwali, uma kusetshenziswa ukuvikelwa kwegesi ye-argon ehlanzekile, ukungezwani okungaphezulu kwechibi elincibilikisiwe kuphezulu, ukwakheka kwe-weld kubi, futhi i-weld shape "i-hunchback". Engeza i-oksijini engu-1-2% ukuze unciphise ukungezwani kwendawo yechibi elincibilikisiwe, okuholela ekwakhekeni kokushisela okubushelelezi nokubukeka kahle.
7. Kungani ingaphezulu lensimbi eqinile yokushisela i-MIG weld iba mnyama?
Impendulo: I-Solid Stainless Stainless steel Stainless Stainless I-MIG Welding inesivinini sokushisela esisheshayo (30-60cm/min), futhi umlomo wombhobho wegesi ovikelayo usuvele ugijimela endaweni yechibi elincibilikisiwe ngaphambili. I-weld isesimeni sokushisa esibomvu esishisayo, esifakwe umoya emoyeni, futhi indawo engaphezulu ikhiqiza ama-oxide, okwenza i-weld ibe mnyama. Indlela ye-pickling passivation ingasusa isikhumba esimnyama futhi ibuyisele umbala ongaphezulu wensimbi engagqwali.
8. Kungani intambo yokushisela yensimbi engagqwali eqinile idinga ukunikezwa kwamandla kagesi ukuze kuzuzwe ukushintshwa kwejethi nokuchaphaza ukushisela kwamahhala?
Impendulo: Uma usebenzisa ucingo oluqinile lwensimbi engagqwali ye-MIG welding, enobubanzi be-wire 1.2, ukuguqulwa kwe-jet kungafinyelelwa kuphela uma I-current I-≥ 260-280A; Amaconsi angaphansi kwaleli nani athathwa njengenguquko yesiyingi esifushane, ngokuchaphazwa okubalulekile futhi ngokuvamile awakwazi ukusetshenziswa. Kuphela ngokusebenzisa i-pulsed power supply ye-MIG ne-pulse current engaphezu kuka-300A lapho uguquko lwe-pulse droplet lungafinyelelwa ngaphansi kwemisinga yokushisela engu-80-260A ngaphandle kwe-spatter welding.
9. Kungani i-CO2 gas shielding isetshenziselwa i-flux cored stainless steel welding wire? Awudingi ugesi onama-pulses?
Impendulo: Okwamanje, izintambo zokushisela zensimbi ezingenasici ezisetshenziswa ngokuvamile (ezifana ne-308, 309, njll.) zinefomula yokushintshashintsha eyakhiwe ngokusekelwe kumakhemikhali okushisela i-metallurgical reaction ekhiqizwa ngaphansi kokuvikelwa kwegesi ye-CO2, ngakho-ke ngeke isetshenziselwe ukushisela i-MAG noma i-MIG. ; Imithombo yamandla we-Pulse arc welding ayikwazi ukusetshenziswa.