Simbi isina tsvina haina hazvo kunetsa kushanda nayo, asi kuigadzira kunoda kunyatsotarisisa zvakadzama.Haibvise kupisa sesimbi yakapfava kana kuti aruminiyamu, uye inogona kurasikirwa nekushomeka kwekuora kana ukaisa kupisa kwakanyanya mairi.Nzira dzakanakisisa dzinobatsira kuchengetedza kusaora kwayo.Mufananidzo: Miller Electric
Kudzivirirwa kwesimbi yesimbi isina tsvina kunoita kuti ive sarudzo inokwezva kune dzakawanda dzakakosha tubing applications, kusanganisira yakakwirira-kuchena chikafu uye chinwiwa, mishonga, kumanikidza mudziyo uye petrochemical applications.Zvisinei, chinhu ichi hachiparadzi kupisa sesimbi yakapfava kana aluminium, uye welding isina kufanira inogona kuderedza kushora kwayo.Kushandisa yakawandisa yekupisa simbi inopinza uye kushandisa masimbi maviri asina kunaka ekuzadza kupisa.
Kutevera mamwe maitiro akanakisa eStainless steel welding inogona kubatsira kuvandudza mhedzisiro uye kuve nechokwadi chekuti simbi inoramba ichiramba yakaora.Kuwedzera, kuvandudza nzira yewelding inogona kuunza zvibereko zvinobatsira pasina kukanganisa kunaka.
Mu Stainless simbi welding, filler simbi kusarudzwa kwakakosha kudzora kabhoni content.Filler simbi dzinoshandiswa Stainless simbi pombi welding inofanira kuwedzera weld performance uye kusangana neapplication zvinodiwa.
Tsvaga simbi dzekuzadza dzine zita rekuti "L", senge ER308L, sezvo ichipa yakaderera yakanyanya kabhoni yemukati inobatsira kuchengetedza corrosion resistance yeyakaderera-carbon stainless steel alloys. Kukwedha simbi yakaderera kabhoni ine simbi yakajairwa yekuzadza kunowedzera iyo kabhoni yejoini yakashongedzwa, kuwedzera njodzi yekuora. Dzivisa masimbi ekuzadza akaiswa masimbi akaiswa masimbi emhando yepamusoro uye akaiswa masimbi epamusoro akaiswa masimbi emhando yepamusoro seanopa tembiricha yekabhoni .
Paunenge uchiputira simbi isina tsvina, zvakakoshawo kusarudza simbi yekuzadza ine yakaderera trace mazinga (inozivikanwawo seisina kusvibiswa) yezvinhu.Izvi zvinosara zvezvinhu zvakasara muzvinyorwa zvinoshandiswa kugadzira masimbi ekuzadza, kusanganisira antimony, arsenic, phosphorus uye sulfur.Izvo zvinogona kukanganisa zvakanyanya kupikisa kwehutu hwezvinhu.
Sezvo simbi isina tsvina inonyatsonzwa nekupisa, kugadzirira kwemajoini uye kusangana kwakakodzera kunoita basa rakakosha mukudzora kupisa kuchengetedza zvinhu zvenyama.Nekuda kwepakaputsika pakati pezvikamu kana kusaenzana, mwenje unofanirwa kugara munzvimbo imwe kwenguva yakareba uye simbi yakawanda yekuzadza inodiwa kuzadza iwo maburi. simbi shoma iri pedyo nekukwana sezvinobvira.
Kuchena kwechinhu ichi kunokoshawo zvikuru.Zvishoma zvishoma zvekusvibiswa kana tsvina mumajoini akasungwa zvinogona kukonzera kukanganisa kunoderedza kusimba uye kusagadzikana kwekuora kwechigadzirwa chekupedzisira.Kuti uchenese substrate isati yaiswa, shandisa simbi isina tsvina yakakosha brashi isina kushandiswa pa carbon steel kana aluminium.
Musimbi isina tsvina, kunzwisiswa ndicho chikonzero chikuru chekurasikirwa kwekusagadzikana kwegora. Izvi zvinogona kuitika kana tembiricha yewelding uye mwero wekutonhora uchichinja zvakanyanya, kushandura microstructure yezvinhu.
Iyi OD weld papombi yesimbi isina tsvina, yakasungwa uchishandisa GMAW uye yakadzorwa simbi deposition (RMD) isina kudzoreredzwa kwemudzi pass, yakafanana nechitarisiko uye kunaka kune welds akagadzirwa nebackflushed GTAW.
Chikamu chakakosha chesimbi isina tsvina yekudzivirira kusvibiswa ndeye chromium oxide.Asi kana carbon content mu weld yakanyanyisa, chromium carbide ichaita.Izvi zvinosunga chromium uye zvinodzivirira kuumbwa kwechromium oxide inodiwa, iyo inopa simbi isina tsvina inodzivirira.
Kudzivirirwa kwekunzwa kunouya pasi pekuzadza simbi kusarudzwa uye kutonga kwekupisa kwekupinza.Sezvakataurwa kare, zvakakosha kusarudza simbi yakaderera kabhoni yesimbi yesimbi isina tsvina.Zvisinei, kabhoni dzimwe nguva inodiwa kuti ipe simba kune mamwe maitiro.Kudzora kupisa kunonyanya kukosha kana yakaderera carbon filler metals haisi sarudzo.
Deredza huwandu hwenguva iyo weld uye nzvimbo inokanganiswa nekupisa inoramba iri patembiricha yakakwirira-inowanzoonekwa 950 kusvika 1,500 madhigirii Fahrenheit (500 kusvika 800 madhigirii celsius).Inguva shoma inopedzwa mukusodha mumhando iyi, inoburitsa kupisa kushoma.Gara uchitarisa uye cherechedza tembiricha yeinterpass muchirongwa chekutengesa.
Imwe sarudzo ndeyokushandisa masimbi anozadza akagadzirwa ane alloying components setitanium uye niobium kudzivirira chromium carbide formation.Nekuti izvi zvikamu zvinokanganisawo simba uye kuoma, aya masimbi ekuzadza haagone kushandiswa mune zvese zvinoshandiswa.
Gas tungsten arc welding (GTAW) yemudzi wekupfuura ndiyo nzira yechinyakare yekushongedza simbi isina tsvina pombi.Izvi zvinowanzoda backflushing ye argon kuti ibatsire kudzivirira oxidation kuseri kwe weld.Zvisinei, kushandiswa kwetambo welding process mu stainless simbi tubing iri kuwedzera uye yakawanda.Muzvikumbiro izvi, zvakakosha kuti unzwisise kuti iyo corrosion yemhando dzakasiyana-siyana inobata sei.
Kana welding simbi isina Stainless uchishandisa gas metal arc welding (GMAW) process, argon necarbon dioxide, musanganiswa weargon neoxygen, kana matatu-gasi musanganiswa (helium, argon, uye carbon dioxide) zvinogara zvichishandiswa. W pasimbi isina tsvina.
Flux-cored wire ye Stainless simbi yakagadzirirwa kushanda nemusanganiswa wechinyakare we75% argon uye 25% carbon dioxide.Flux ine zvigadzirwa zvakagadzirirwa kudzivirira kabhoni kubva kune inodzivirira gasi kubva pakusvibisa weld.
Sezvo maitiro eGMAW ashanduka, akarerutsa machubhu esimbi isina tsvina uye mapaipi.Kunyange zvazvo mamwe maapplication angave achiri kuda maitirwo eGTAW, magadzirirwo ewaya epamberi anogona kupa mhando yakafanana uye kugadzirwa kwepamusoro mune dzakawanda simbi isina tsvina.
Stainless simbi ID welds akagadzirwa neGMAW RMD akafanana mumhando uye chitarisiko kune anoenderana OD welds.
The root pass using modified short-circuit GMAW process yakadai seMiller's Regulated Metal Deposition (RMD) inobvisa backflushing mune mamwe austenitic stainless steel applications.The RMD root pass inogona kuteverwa ne pulsed GMAW kana flux-cored arc welding fill uye cap passes-shanduko inochengetedza nguva nemari kana ichienzaniswa nekushandisa GTAW, kunyanya kumashure.
RMD inoshandisa yakanyatsodzorwa kupfupika kwesimbi yekufambisa simbi kuti ibudise yakadzikama, yakagadzikana arc uye weld puddle.Izvi zvinopa mukana mushoma wekutonhora kwemakumbo kana kushaikwa kwekusanganiswa, zvishoma spatter uye yepamusoro yemhando yepombi mudzi pass.Chaizvoizvo inodzorwa simbi kutamisa kunopawo yunifomu yedonhwe deposition uye kudzora kuri nyore kwechidziva che weld uye naizvozvo kupisa kupinza uye welding kasi.
Maitiro asina kujairika anogona kuwedzera welding productivity.Paunenge uchishandisa RMD, welding speed inogona kuva 6 kusvika 12 in./min.Nekuti iyo nzira inowedzera kubereka pasina kuwedzera kupisa kwezvikamu, inobatsira kuchengetedza zvivako uye kushorwa kwesimbi yesimbi.
Iyi pulsed GMAW process inopa mapfupi arc kureba, yakamanikana arc cones uye kushoma kupisa kwekuisa pane yakajairwa spray pulse transfer.Sezvo nzira yacho yakavharwa-loop, arc drift uye tip-to-workpiece kureba kusiyana kunobviswa zvachose.Izvi zvinopa nyore puddle control for in-place and out-of-place welding.Pakupedzisira, bepad midzi yeMDW yekuzadza neRMD inobvumira kuti tive pulsed midzi yeMDW. waya imwe uye gasi rimwe chete, kubvisa maitiro ekuchinja nguva.
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