Simbi isina simbi haina hazvo kunetsa kushanda nayo, asi welding yayo inoda kutarisisa kune zvakadzama.Iyo haibvise kupisa sesimbi yakapfava kana aruminiyamu uye inogona kurasikirwa nekumwe kutadza kana ukaipisa zvakanyanya.Maitiro akanakisa anobatsira kuchengetedza kusaonda kwayo.Mufananidzo: Miller Electric
Kupokana kwekuora kwesimbi isina tsvina kunoita kuti ive sarudzo inokwezva kune akawanda akakosha pombi maapplication, anosanganisira yakakwira kuchena chikafu uye chinwiwa, mishonga, dhizaini uye petrochemical application.Nekudaro, chinhu ichi hachiparadze kupisa sesimbi yakapfava kana aluminium, uye welding isina kufanira inogona kuderedza kushomeka kwayo.Kuisa kupisa kwakanyanya uye kushandisa isiriyo yekuzadza simbi zvikonzero zviviri.
Kutevera mamwe emhando yepamusoro yesimbi isina simbi welding maitiro anogona kubatsira kuvandudza mhedzisiro uye kuona kuti simbi inoramba isingadziviriri.Uye zvakare, kukwidziridza iyo welding process inogona kuwedzera chibereko pasina kupira mhando.
Kana welding simbi isina tsvina, kusarudzwa kwesimbi yekuzadza kwakakosha kudzora kabhoni yemukati.Filler simbi dzinoshandiswa kupinza simbi isina tsvina pombi dzinofanirwa kuvandudza mashandiro ewelding uye kuve akakodzera kunyorera.
Tarisa "L" zita rekuzadza simbi senge ER308L sezvo vachipa yakaderera yakanyanya kabhoni yemukati iyo inobatsira kuchengetedza corrosion kuramba mune yakaderera kabhoni isimbi isina tsvina alloys.Welding yakaderera kabhoni base simbi ine yakajairwa filler simbi inowedzera kabhoni yemukati meweld joint, zvichiwedzera njodzi yekuora.Dzivisa simbi dzekuzadza dzakatemwa "H" sezvo dzichipa yakakwira kabhoni yemukati uye inoitirwa maapplication anoda simba repamusoro pane tembiricha yakakwira.
Paunenge uchiputira simbi isina tsvina, zvakakoshawo kusarudza simbi yekuzadza ine yakaderera trace mazinga (inozivikanwawo setsvina) yezvinhu.Izvi zvinhu zvakasara mumidziyo inoshandiswa kugadzira simbi yekuzadza, kusanganisira antimony, arsenic, phosphorus uye sarufa.Vanogona kukanganisa zvakanyanya kusimba kwekuora kwezvinhu.
Nemhaka yokuti simbi isina tsvina inonyatsonzwa kupinza kwekupisa, kugadzirira pamwe chete uye kuungana kwakakodzera kunoita basa rinokosha mukudzora kupisa kuchengetedza zvinhu zvenyama.Makapu pakati pezvikamu kana kusaenzana kwakaenzana kunoda kuti tochi igare munzvimbo imwechete kwenguva refu, uye simbi yakawanda yekuzadza inodiwa kuzadza iwo maburi.Izvi zvinogona kukonzera kupisa kunowedzera munzvimbo yakakanganiswa, iyo inogona kuita kuti chikamu chacho chiwedzere.Kusakwana kwakashata kunogonawo kuita kuti zviome kuvharira gap uye kuwana inodiwa kupinda kweweld.Chenjerera kuenzanisa zvikamu kune simbi isina tsvina zvakanyanya sezvinobvira.
Kuchena kwechinhu ichi kunokoshawo zvikuru.Zvishoma zvishoma zvezvinosvibisa kana tsvina mumajoini akasungwa zvinogona kukonzera kukanganisa kunoderedza simba uye kusagadzikana kwekuora kwechigadzirwa chekupedzisira.Kuti uchenese substrate usati welding, shandisa chaiyo Stainless simbi bhurashi isati yashandiswa pacarbon steel kana aluminium.
Mune simbi isina tsvina, sensitization ndicho chikonzero chikuru chekurasikirwa kwekupokana kwekuora.Izvi zvinogona kuitika kana tembiricha yewelding uye mwero wekutonhora uchichinja zvakanyanya, zvichikonzera shanduko mune microstructure yezvinhu.
Iyi yekunze weld pane Stainless simbi pombi, welded uchishandisa GMAW uye controlled deposition simbi (RMD) isina mudzi backwash, yakafanana pakuonekwa uye kunaka kune welds dzakagadzirwa neGTAW backwash.
Chikamu chakakosha chekupokana kwekuora kwesimbi isina tsvina ndeye chromium oxide.Asi kana iyo kabhoni yemukati weld yakawandisa, chromium carbide inoumbwa.Vanosunga chromium uye vanodzivirira kuumbwa kweinodiwa chromium oxide, iyo inopa simbi isina tsvina kuramba kwayo kusimba.Kana pasina chromium oxide yakakwana, zvinhu zvacho hazvizove nehunhu hunodiwa uye kuparara kuchaitika.
Kudzivirirwa kwekunzwa kunouya pasi kune yekuzadza simbi kusarudzwa uye kupisa kwekuisa kudzora.Sezvambotaurwa, zvakakosha kuti usarudze simbi yekuzadza ine yakaderera kabhoni yemukati kana welding simbi isina tsvina.Nekudaro, kabhoni dzimwe nguva inodiwa kuti ipe simba kune mamwe maapplication.Kudzora tembiricha kunonyanya kukosha kana yakaderera kabhoni filler masimbi asina kukodzera.
Deredza nguva iyo weld neHAZ iri patembiricha yakakwira, kazhinji 950 kusvika 1500 madhigirii Fahrenheit (500 kusvika 800 degrees Celsius).Iyo shoma nguva solder inopedza mumhando iyi, iyo inoburitsa kupisa kushoma kwainoburitsa.Gara uchitarisa uye tarisa tembiricha yeinterpass panguva yekugadzira solder.
Imwe sarudzo ndeye kushandisa simbi yekuzadza ine alloying zvikamu zvakaita setitanium uye niobium kudzivirira kuumbwa kwechromium carbide.Nekuti izvi zvikamu zvinokanganisawo simba uye kuoma, aya masimbi ekuzadza haagone kushandiswa mune zvese zvinoshandiswa.
Root weld tungsten arc welding (GTAW) inzira yechinyakare welding yepombi yesimbi isina tsvina.Izvi zvinowanzoda argon backflush kudzivirira oxidation pazasi pe weld.Nekudaro, kushandiswa kwewaya welding maitiro mumapombi esimbi isina tsvina kuri kuwedzera kuwanda.Muzviitiko izvi, zvakakosha kuti unzwisise kuti akasiyana sei ekudzivirira magasi anokanganisa kusimba kwekuora kwezvinhu.
Kana welding Stainless simbi uchishandisa gas arc welding (GMAW) yagara ichishandiswa argon uye carbon dioxide, musanganiswa argon uye okisijeni kana matatu-gasi musanganiswa (helium, argon uye carbon dioxide).Kazhinji, misanganiswa iyi ine argon kana helium uye isingasviki 5% kabhoni dhaikisaidhi nekuti kabhoni dhayokisaidhi inopa kabhoni kune weld pool uye inowedzera njodzi yekukurudzira.Pure argon haikurudzirwe kuGMAW pasimbi isina tsvina.
Cord waya yesimbi isina tsvina yakagadzirirwa kushanda nemusanganiswa wechinyakare we75% argon uye 25% carbon dioxide.Iyo inoyerera ine zvinongedzo zvakagadzirirwa kudzivirira kusvibiswa kweiyo weld nekabhoni kubva kune inodzivirira gasi.
Sezvo maitiro eGMAW akashanduka, vakaita kuti zvive nyore kupinza pombi dzesimbi isina tsvina.Nepo mamwe maapplication angave achiri kuda maitiro eGTAW, magadzirirwo ewaya epamberi anogona kupa mhando yakafanana uye kugadzirwa kwepamusoro mune dzakawanda simbi isina tsvina.
ID Stainless simbi welds yakagadzirwa neGMAW RMD yakafanana mumhando uye chitarisiko kune inoenderana OD welds.
Mudzi wekupfuura uchishandisa yakagadziridzwa pfupi wedunhu GMAW maitiro senge Miller's inodzorwa simbi deposition (RMD) inobvisa backwash mune mamwe austenitic simbi isina simbi zvikumbiro.Iyo RMD midzi pass inogona kuteverwa ne pulsed GMAW kana flux-cored arc welding kuzadza nekuvhara mapasi, shanduko inochengetedza nguva nemari kana ichienzaniswa nekushandisa backflushed GTAW, kunyanya pamapaipi makuru edhayamita.
RMD inoshandisa yakanyatsodzorwa ipfupi yedunhu simbi kutamisa kuburitsa yakanyarara, yakagadzikana arc uye weld dziva.Izvi zvinoguma nemukana mushoma wekutonhora kumhanya-mukati kana kusanyungudika, kushoma spatter, uye nani pombi mudzi pass quality.Kunyatsodzorwa kwesimbi kutamisa zvakare kunovimbisa yunifomu yekudonhedza kuiswa uye kudzora kuri nyore kwedziva re weld uye nekudaro kupinza kwekupisa uye kumhanya kwewelding.
Maitiro asiri echinyakare anogona kuvandudza kugadzirwa kwewelding.Paunenge uchishandisa RMD, iyo welding yekumhanyisa inogona kubva pa6 kusvika 12 mu/min.Nekuti maitiro anovandudza kugadzirwa pasina kuwedzera kupisa kwezvikamu, anobatsira kuchengetedza zvivakwa uye corrosion kuramba kwesimbi isina tsvina.Kuderedza kupinza kwekupisa kwemaitiro kunobatsirawo kudzora substrate deformation.
Iyi pulsed GMAW maitiro inopa ipfupi arc kureba, yakatetepa arc koni, uye kushoma kwekuisa kupisa pane yakajairwa pulsed spraying.Sezvo maitiro akavharwa, arc Drift uye kuchinjika kwechinhambwe pakati pechipimo uye workpiece zvinotobviswa.Izvi zvinorerutsa manejimendi eweld pool ine uye isina welding panzvimbo.Pakupedzisira, musanganiswa we pulsed GMAW yekuzadza uye kumusoro roll neRMD yemidzi roll inobvumira nzira yewelding kuti iitwe uchishandisa waya imwe chete uye gasi rimwe chete, kuderedza process yekuchinja nguva.
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