9.25*1.24mm ASTM A216 316/316L Amashubhu ensimbi engagqwali ahlanganiswe avela eChina

Lapho beshisela i-300 Series insimbi engagqwali, osonkontileka bangakwazi ukuqeda i-backflushing ezimpandeni zamapayipi ahlangene avulekile ngenkathi begcina ikhwalithi ephezulu yokushisela.
Ukushiselwa kwamashubhu ensimbi engagqwali namapayipi ngokuvamile kudinga ukushintshwa kwe-backflushing nge-argon kusetshenziswa izinqubo zendabuko ezifana ne-gas shielded tungsten arc welding (GTAW) kanye ne-shielded metal arc welding (SMAW).Kodwa izindleko zegesi kanye nesikhathi esithathayo ukuqedela inqubo yokuhlanza kungabaluleka, ikakhulukazi njengoba ububanzi bepayipi nobude bukhula.

Lapho beshisela i-300 Series insimbi engagqwali, osonkontileka bangashintshela kunqubo eguquliwe ye-short circuit metal arc welding (GMAW) esikhundleni se-GTAW yendabuko noma i-SMAW.Inqubo ye-GMAW yesifunda esifushane ethuthukisiwe iphinde inikeze ukusebenza okwengeziwe, ukusebenza kahle kanye nezinzuzo zokusebenzisa kalula ukusiza ukukhulisa inzuzo.
Ngenxa yokumelana nokugqwala namandla, ama-alloys ensimbi engagqwali asetshenziswa ezinhlelweni eziningi zamapayipi, okuhlanganisa uwoyela negesi, i-petrochemical, kanye nezimboni ze-biofuel.Nakuba i-GTAW ijwayele ukusetshenziswa ezinhlelweni eziningi zensimbi engagqwali, inobubi obuthile obusingathwa nge-GMAW eguquliwe yesekethe emfushane.
Okokuqala, ngenxa yokushoda okuqhubekayo kwabashiseli abanamakhono, ukuthola ochwepheshe be-GTAW kuyinselele eqhubekayo.Okwesibili, i-GTAW akuyona inqubo yokushisela eshesha kakhulu, okwenza kube nzima ezinkampanini ezifuna ukukhulisa umkhiqizo ukuze zihlangabezane nezidingo zamakhasimende.Okwesithathu, ukubuyiselwa emuva okude nokubizayo kwamapayipi ensimbi engagqwali kanye namapayipi kuyadingeka.
I-Purge ukwethulwa kwegesi ngesikhathi sokushisela ukuze kukhishwe ukungcola futhi kunikeze ukwesekwa.I-back side purge ivikela uhlangothi olungemuva lwe-weld kusukela ekwakhekeni kwama-oxide asindayo lapho kukhona umoya-mpilo.
Uma ingemuva lingavikelekile ngesikhathi sokushiselwa kwe-root canal, lokhu kungase kubangele ukuqhekeka kwezinto eziyisisekelo.Lesi sici sibizwa ngokuthi i-shugaring, okuthiwa ngenxa yokuthi ingaphezulu elingaphakathi kwe-weld lifana kakhulu noshukela.Ukuze uvimbele ukushuga, umshiseli ufaka ipayipi legesi engxenyeni eyodwa yepayipi, bese exhuma iziphetho zepayipi ngamapulaki okuhlanza.Baphinde benza imbobo ngakolunye uhlangothi lwepayipi.Zibuye zifakwe ngokunamathiselwe eduze kwe-seams.Ngemva kokuhlanza ipayipi, basusa ucezu lwe-tape ezungeze isihlanganisi futhi baqhubeka nokushisela, bephinda inqubo yokuhlubula nokushisela kuze kuqedwe ukushisela impande.
I-Blowback ingabiza inani elibalulekile lesikhathi nemali, kwezinye izimo zengeze izinkulungwane zamadola kuphrojekthi.Ukushintshela kunqubo ethuthukisiwe yomjikelezo omfushane we-GMAW kuvumele inkampani ukuthi yenze amaphasi angenazimpande abuyela emuva ezinhlelweni eziningi zensimbi engagqwali.I-Welding 300 series stainless steels iyikhandidethi elihle, kuyilapho ukushisela izinsimbi ezingenasici eziphindwe kabili okwamanje kudinga i-GTAW yamaphasi ezimpande.
Ukugcina okokufaka kokushisa kuphansi ngangokunokwenzeka kusiza ukugcina ukumelana nokugqwala kwendawo yokusebenza.Enye indlela yokunciphisa okokufaka ukushisa ukunciphisa inani lamaphasi we-welding.Inqubo ye-GMAW yesifunda esifushane eguquliwe njenge-controlled metal deposition (RMD®) isebenzisa ukudluliswa kwensimbi okulawulwa ngokunembile ukuze kuqinisekiswe ukubekwa kwamaconsi okufanako.Lokhu kwenza kube lula ngomshiseli ukulawula i-weld pool, ngaleyo ndlela elawula okokufaka kokushisa kanye nesivinini sokushisela.Okokufaka okuncane kokushisa kuvumela ukugeza okuncibilikisiwe ukuthi kube yiqhwa ngokushesha.
Ngenxa yokudluliswa kwensimbi okulawulwayo kanye nokubanda okusheshayo kwechibi lokushisela, i-weld pool iba nesiyaluyalu kancane futhi igesi evikelayo iphuma ithoshi ye-GMAW ngokushelela ngokuqhathaniswa.Lokhu kuvumela igesi evikelayo ukuthi iphoqwe empandeni eveziwe, iphoqelele ukuphuma emkhathini futhi ivimbele ukukhishwa kwe-saccharification noma i-oxidation ngaphansi kwe-weld.Ngenxa yokuthi i-puddle iba yiqhwa ngokushesha okukhulu, kuthatha isikhathi esincane kakhulu ukuba igesi ilimboze.
Ukuhlola kubonise ukuthi inqubo ye-GMAW yesekethe emfushane eguquliwe ihlangabezana nezindinganiso zekhwalithi yokushisela kuyilapho igcina ukumelana nokugqwala kwensimbi engagqwali njengalapho kusetshenziswa i-GTAW yokushisela impande yokudlula.
Ukushisela imisele yezimpande evulekile usebenzisa inqubo ye-GMAW yesifunda esifushane eguquliwe kungaletha nezinye izinzuzo mayelana nokukhiqiza, ukusebenza kahle, nokuqeqeshwa kokushisela.
Izinguquko ezinqubweni zokushisela zidinga izinkampani ukuthi zifaneleke izinqubo zazo, kodwa lolu shintsho lungakhokha ngokuya kwesikhathi nokongiwa kwezindleko - kukho kokubili ukukhiqizwa okusha nokulungiswa kabusha.
Ukushisela imisele yezimpande evulekile usebenzisa inqubo ye-GMAW yesifunda esifushane eguquliwe kungaletha nezinye izinzuzo mayelana nokukhiqiza, ukusebenza kahle, nokuqeqeshwa kokushisela.Lokhu kubandakanya:
Iqeda amathuba eziteshi ezishisayo ngenxa yokuthi kungenzeka ukuthi kufakwe insimbi eyengeziwe ukuze kwandiswe ukushuba komgudu wempande.
Ukumelana okuhle kakhulu nokufuduka okuphezulu nokuphansi phakathi kwezigaba zamapayipi.Le nqubo ingavala kalula izikhala ezingafika ku-3⁄16 amayintshi ngenxa yokudluliswa kwensimbi okubushelelezi.
Ubude be-arc obungaguquki buyagcinwa kungakhathaliseki ukunwetshwa kwe-electrode, okunxephezela abaqhubi abazabalaza ukugcina ubude besandiso esingaguquki.Ichibi lokushisela elilawulwa kakhulu kanye noshintsho lwensimbi olungaguquki kunciphisa isikhathi sokuqeqeshwa kwabashiseli abasha.
Yehlisa isikhathi sokuphumula soshintsho lwenqubo.Intambo efanayo kanye negesi yokuvikela ingasetshenziselwa izimpande, ukugcwalisa kanye nokudlula kwehawu.Inqubo ye-pulsed GMAW ingasetshenziswa uma nje iziteshi zigcwaliswa futhi zivalwa ngegesi evikelayo equkethe okungenani i-argon engu-80%.
Ngemisebenzi efuna ukuqeda ukwehla kwe-backflushing ezinhlelweni zensimbi engagqwali, kubalulekile ukulandela amathiphu amahlanu abalulekile ukuze uguqule ngempumelelo kunqubo ye-GMAW yesekethe emfushane ethuthukisiwe.
Hlanza amapayipi ngaphakathi nangaphandle ukuze ususe noma yikuphi ukungcola.Hlanza okungenani iyintshi engu-1 kusukela onqenqemeni lokufata ngebhulashi lentambo elidizayinelwe insimbi engagqwali.
Sebenzisa i-silicon ephezulu yensimbi yokugcwalisa insimbi efana ne-316LSi noma i-308LSi.Okuqukethwe kwe-silicon ephakeme kusiza ukumanzisa ukugeza okuncibilikayo futhi kusebenza njenge-deoxidizer.
Ukuze uthole imiphumela engcono kakhulu, sebenzisa ingxube yegesi yesihlangu eyakhelwe ngokukhethekile inqubo, efana no-90% we-helium, u-7.5% we-argon, kanye no-2.5% we-carbon dioxide.Enye inketho i-98% argon kanye ne-2% ye-carbon dioxide.Umphakeli wegesi yokushisela angase abe nezinye izincomo.
Ukuze uthole imiphumela ehamba phambili, sebenzisa ithiphu yekhoni kanye nomlomo we-root canal ukumboza igesi eqondiwe.I-conical nozzle ene-gas diffuser eyakhelwe ngaphakathi inikeza ukumbozwa okuhle kakhulu.
Qaphela ukuthi ukusebenzisa inqubo emfushane ye-GMAW eguquliwe (ayikho igesi ebekiwe) kuphumela enanini elincane lemfucumfucu ngemuva kwe-weld.Ivamise ukushabalala njengoba i-weld iphola futhi ihlangabezana namazinga ekhwalithi embonini kawoyela, izitshalo zikagesi namakhemikhali e-petrochemical.
UJim Byrne ungumphathi wokuthengisa nezicelo we-Miller Electric Mfg. LLC, 1635 W. Spencer St., Appleton, WI 54912, 920-734-9821, www.millerwelds.com.
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