Ukushiselaigesi yokuvikela ehlanganisiweyakhelwe ukuthuthukisa izinga lokushisela. Amagesi adingekayo ukuze igesi exubile futhi ezivamile Welding shielding amagesi ezifanaumoya-mpilo, i-carbon dioxide, i-argon, njll. Ukusebenzisa igesi exubile esikhundleni segesi eyodwa yokuvikela ukushisela kunomphumela omuhle wokucwenga kakhulu amaconsi ancibilikisiwe, ukukhuthaza ukushelela kwe-weld, ukuthuthukisa ukwakheka, nokunciphisa izinga lama-pores, futhi kudume kakhulu ekushiseni, ukusika nezinye izimboni.

Njengamanje, okuvame ukusetshenziswa kakhuluamagesi axubileingahlukaniswa ngamagesi axubile kanambambili kanye namagesi axubile angama-ternary ngokuya ngohlobo lwamagesi axubile.

Isilinganiso sengxenye ngayinye ohlotsheni ngalunye lweigesi exubilezingahluka ngobubanzi obukhulu, obunqunywa ngokuyinhloko izici eziningi ezifana nenqubo yokushisela, izinto zokushisela, imodeli yocingo lokushisela, njll. Ngokuvamile, izinga eliphakeme lezidingo zekhwalithi yokushisela, ziphakeme kakhulu izidingo zokuhlanzeka zegesi elilodwa elisetshenziselwa ukulungisaigesi exubile.

Izingxenye Ezimbili Igesi Elixutshiwe

I-Argon+Oxygen

Ukwengeza inani elifanele leumoya-mpiloukuze i-argon ingathuthukisa ngokuphumelelayo ukuzinza kwe-arc futhi icwenge amaconsi ancibilikisiwe. Izakhiwo ezisekela ukushiswa komoya-mpilo zingakhuphula izinga lokushisa lensimbi echibini elincibilikisiwe, zikhuthaze ukugeleza kwensimbi, zinciphise amaphutha okushisela, zenze i-weld ishelele, futhi isheshise isivinini sokushisela futhi ithuthukise ukusebenza kahle kokushisela. Ngaphezu kwalokho, igesi yokuvikela i-oksijeni + i-argon inokusetshenziswa okubanzi futhi ingasetshenziselwa ukushisela i-carbon steel, insimbi ephansi ye-alloy kanye nensimbi engagqwali enobukhulu obuhlukahlukene.

I-Argon+I-Carbon Dioxide

I-Carbon dioxide ingathuthukisa amandla e-weld kanye nokumelana nokugqwala, kodwa igesi ehlanzekile ye-carbon dioxide evikela igesi isakazeka kakhulu, engahambisani nokusebenza kwabasebenzi. Ukuyixuba ne-argon ezinzile kunganciphisa ngempumelelo izinga lokufafaza kwensimbi. Ukusebenzisa izilinganiso ezihlukene ze-oxygen + i-argon shielding gas kunezinzuzo ezisobala zokushisela i-carbon steel nensimbi engagqwali.

I-Argon+Hydrogen

I-hydrogeniyigesi enciphisa ukushisa esekela ukuvutha engakwazi nje ukwandisa izinga lokushisa kwe-arc, isheshise isivinini sokushisela, futhi ivimbele ukusika phansi, kodwa futhi inciphise amathuba okuba ama-CO pores akhe futhi avimbele ukukhubazeka kokushisela. Inemiphumela emihle kakhulu yokushisela kuma-alloys asekelwe ku-nickel, ama-alloys e-nickel-copper, nensimbi engagqwali.

Izingxenye Ezintathu Igesi Elixutshiwe

I-Argon+Oxygen+Carbon Dioxide

Lena izingxenye ezintathu ezisetshenziswa kakhulu ingxube yegesi, enemiphumela ehlangene yokuvikela yezingxenye ezimbili ezingenhla zezingxube zegesi.Umoya-mpiloisiza ukuvutha, ingacwenga amaconsi ancibilikisiwe, ithuthukise ikhwalithi yokushisela kanye nesivinini sokushisela; i-carbon dioxide ingathuthukisa amandla e-weld nokumelana nokugqwala, futhi i-argon inganciphisa i-spatter. Ngokushiselwa kwe-carbon steel, i-low alloy steel nensimbi engagqwali, le ngxube ye-ternary gas inomphumela omuhle kakhulu wokuvikela.

I-Argon+Helium+Carbon Dioxide

I-Heliumingakhuphula okokufaka kwamandla okushisa, ithuthukise uketshezi lwechibi elincibilikisiwe futhi ikhuthaze ukwakheka kwe-weld. Kodwa-ke, ngenxa yokuthi i-helium iyigesi engasebenzi, ayinawo umthelela ekushiseni kwe-oxidation ne-alloy yensimbi yokushisela. Ngakho-ke, ingasetshenziselwa i-carbon steel kanye ne-low alloy steel pulse jet arc welding, insimbi enamandla amakhulu, ikakhulukazi indawo yonke ye-short-circuit transition welding, nensimbi engagqwali yonke indawo ye-short-circuit arc welding ngokulungisa izilinganiso ezahlukene.