Imiba eMikhulu esithoba kwi-Stainless Steel Welding
1. Yintoni intsimbi engatyiwayo kunye neasidi enganyangekiyo?
Impendulo: Umxholo wento ephambili "i-chromium" kwizinto zetsimbi (kunye nokongezwa kwezinye izinto ezifana ne-nickel kunye ne-molybdenum) inokwenza isinyithi kwisimo esingenasiphelo kwaye sibe neempawu ezingenasici. Intsimbi enganyangekiyo kwi-asidi ibhekisa kwintsimbi ekwaziyo ukumelana nomhlwa kwimithombo yeendaba eyomeleleyo efana neasidi, ialkali, kunye netyuwa.
2. Yintoni i-austenitic stainless steel? Ngawaphi amabanga adla ngokusetyenziswa?
Impendulo: I-Austenitic stainless steel yeyona nto isetyenziswa kakhulu kwaye inezona ntlobo zininzi. Umzekelo:
18-8 uthotho: 0Cr19Ni9 (304) 0Cr18Ni8 (308)
18-12 uthotho: 00Cr18Ni12Mo2Ti (316L)
25-13 uthotho: 0Cr25Ni13 (309)
25-20 series: 0Cr25Ni20, njl
3. Kutheni kukho inqanaba elithile lobunzima bobugcisa kwi-welding steel stainless?
Impendulo: Obona bunzima benkqubo bu:
I-1) Izinto zensimbi ezingenasici zinovakalelo oluqinileyo lwe-thermal, kunye nexesha elide lokuhlala kuluhlu lwamaqondo obushushu angama-450-850 ℃, okukhokelela ekunciphiseni okubonakalayo kokuxhathisa kwe-welds kunye neendawo ezichaphazelekayo kubushushu.
I-2) Ilungele ukuqhekeka kwe-thermal.
3) Ukukhuselwa okungalunganga kunye ne-oxidation ephezulu yobushushu obuphezulu.
I-4) I-coefficient yokwandiswa komgca inkulu, okubangela ukuguqulwa okubalulekileyo kwe-welding.
4. Kutheni imilinganiselo yenkqubo esebenzayo iyimfuneko kwi-welding austenitic stainless steel?Impendulo: Amanyathelo enkqubo ngokubanzi aquka:
I-1) Khetha ngokuthe ngqo izinto ze-welding ngokusekelwe kwimichiza yezinto ezisisiseko.
2)Incinci yangoku, i-welding ekhawulezayo; Amandla omgca omncinci anciphisa igalelo lobushushu.
3) I-Welding wire kunye ne-electrode, i-non-swinging, i-multi-layer kunye ne-multi pass welding.
I-4) Ukupholisa okunyanzeliswayo kwee-welds kunye neendawo ezichaphazelekayo zokushisa ukunciphisa ixesha lokuhlala kwi-450-850 ℃.
I-5) i-TIG ye-welding seam yokukhusela i-argon.
I-6)I-weld seam xa idibene ne-corrosive medium igqitywe.
I-7) Ukunyangwa kwe-Passivation ye-welds kunye nemimandla echaphazelekayo yokushisa.
5. Kutheni kuyimfuneko ukusebenzisa i-25-13 yocingo lwe-welding kunye ne-electrode ye-welding ye-austenitic stainless steel, i-carbon steel, kunye ne-low-alloy steel (i-dissimilar steel welding)?
Impendulo: Ukudibanisa iintsimbi zentsimbi ezidibeneyo ezidibanisa i-austenitic stainless steel nge-carbon steel kunye ne-low-alloy steel, isinyithi esifakwe kwi-weld kufuneka sisebenzise i-25-13 yeengcingo ze-welding series (309, 309L) kunye neentonga ze-welding (Ao312, Ao307, njl.) . Ukuba ezinye izinto ze-welding zensimbi zisetyenzisiweyo, isakhiwo se-martensitic siya kuveliswa kumgca we-fusion we-carbon steel kunye ne-low-alloy steel, eya kubangela ukuqhekeka okubandayo.
6. Kutheni igesi ekhuselayo ye-98% Ar + 2% O2 isetyenziselwa i-stainless steel welding wire?
Impendulo: Xa usebenzisa i-stainless steel stainless steel welding ye-MIG, ukuba i-argon ecocekileyo yokukhusela igesi isetyenzisiweyo, ukuxinwa komphezulu we-pool etyhidiweyo kuphezulu, ukubunjwa kwe-weld kubi, kunye ne-weld shape "hunchback". Yongeza i-1-2% ye-oksijini ukunciphisa ukuxinana komphezulu wedama elityhidiweyo, okukhokelela ekubunjweni kwe-weld egudileyo kunye nobuhle.
7. Kutheni umphezulu wentsimbi eqinileyo yokuwelda i-MIG weld ujika ube mnyama?
Impendulo: Intsimbi yensimbi engenasici ye-MIG ye-welding inesantya esikhawulezayo (30-60cm / min), kwaye i-nozzle yegesi ekhuselayo sele iqhubela phambili kwindawo ye-pool etyhidiweyo. I-weld isekwimeko yobushushu obubomvu obuphezulu, ifakwe ioksijini ngumoya, kwaye umphezulu uvelisa iioksidi, ezibangela ukuba i-weld ijike ibemnyama. Indlela ye-pickling passivation inokususa ulusu olumnyama kwaye ibuyisele umbala wokuqala wentsimbi.
8. Kutheni ucingo oluqinileyo lwentsimbi yokuwelda lufuna unikezelo lwamandla olwenziwayo ukufezekisa utshintsho lwejethi kunye nokutshiza kwewelding yasimahla?
Impendulo: Xa usebenzisa ucingo oluqinileyo lwensimbi engenasici kwi-MIG welding, kunye nobubanzi be-1.2 wire, utshintsho lwe-jet lunokufezekiswa kuphela xa okwangoku ndikhona ≥ 260-280A; Amathontsi angaphantsi kweli xabiso athathwa njengenguqu emfutshane yesekethe, enokutshizwa okubalulekileyo kwaye ayinakusetyenziswa ngokubanzi. Kuphela ngokusebenzisa i-pulsed MIG amandla ombane kunye ne-pulse yangoku enkulu kune-300A inokuthi i-pulse droplet transition iphunyezwe phantsi kwee-welding currents ze-80-260A ngaphandle kwe-spatter welding.
9. Kutheni i-CO2 yokukhusela igesi isetyenziselwa i-flux cored steel stainless steel welding wire? Awufuni unikezelo lombane ngeepulses?
Impendulo: Okwangoku, i-flux cored cored stainless steel welding wires (ezifana ne-308, 309, njl.) zinefomula ye-flux ephuhliswe ngokusekelwe kwi-welding chemical reaction metallurgical eyenziwa phantsi kwe-CO2 yokukhusela igesi, ngoko ayinakusetyenziselwa i-MAG okanye i-MIG welding. ; Imithombo yamandla e-Pulse arc welding ayinakusetyenziswa.