(1) Weldability yesimbi nealuminium uye alloys ayo
Iron, manganese, chromium, nickel uye zvimwe zvinhu musimbi zvinogona kusanganiswa nealuminium mune liquid state kuti iite shoma yakasimba mhinduro, uye zvakare kugadzira intermetallic compounds. Kabhoni musimbi inogonawo kuumba makomboni nealuminium, asi anenge asingaenderane kune akasimba. dissolve. Pakati pezvakasiyana-siyana zvealuminium nesimbi, zvakasiyana-siyana zvebrittle intermetallic compounds zvinogona kuumbwa, pakati peiyo FeAls ndiyo inonyanya brittle.
Iine simba rakakosha pamagetsi emagetsi emajoini akasungwa esimbi nealuminium, kusanganisira microhardness. Uye zvakare, sezvo iyo thermophysical zvimiro zvesimbi, aluminium uye alloys avo zvakare akasiyana zvakanyanya, iyo weldability yesimbi nealuminium yakashata.
(2) Welding maitiro esimbi nealuminium uye alloys ayo
Kubva pane zvakataurwa pamusoro pekuongorora kwesimbi-aluminium weldability, zvinenge zvisingabviri kuderedza kuderedzwa kwesimbi nealuminium uye alloys ayo kuburikidza nekubatanidza fusion welding.
Zvinenge zvisingabviri kushandisa simbi kana alloy iyo inopisa muviri zvinhu zviri pakati pesimbi nearuminiyamu uye iyo inogona kuve metallurgically inopindirana neaviri sesimbi yekuzadza yekunakisa welding.
Muchiito chekugadzira, pane nzira mbiri: yekubikira layer indirect fusion welding uye yepakati shanduko chidimbu indirect fusion welding.
1) Coating layer indirect welding nzira Simbi nealuminium isati yaiswa weld, imwe kana akati wandei akaturikidzana esimbi anogona kusanganiswa nesimbi neakakodzera filler simbi inoturikwa pamusoro pesimbi kuti iite pre-coating layer, uyezve. yakashandiswa Gasi tungsten arc welding nzira Nzira yewelding yakavharwa simbi kune aruminiyamu.
Inoratidzwa nekudzidzira uye bvunzo:
Iro rimwe chete rekuputira rinogona kudzivirira chete oxidation yesimbi yepasi, asi haigone kudzivirira chizvarwa che intermetallic compounds, uye simba rayo rekubatana richiri rakaderera zvikuru. Naizvozvo, argon arc welding yesimbi uye aluminiyamu inofanira kuitwa neyakaumbwa coating.
Kune zvakawanda zvesimbi zvekugadzira, zvakadai seNi, Cu, Ag, Sn, Zn uye zvichingodaro. Iyo yekuputira simbi zvinhu zvakasiyana, uye mhedzisiro mushure mekutangisa zvakare yakasiyana. Mitswe iri nyore kuumba paNi, Cu, Ag composite coating; Ni, Cu, Sn composite coating iri nani; Ni, Zn composite coating ine yakanakisa mhedzisiro.
Iyo argon arc welding yecomposite yakavharwa kabhoni simbi uye aruminiyamu uye alloys ayo ndeyekutanga kupfekedza simbi yakaita semhangura kana sirivheri padivi resimbi, uye wozopfekedza jira rezingi. Kana welding, zinc inotanga kunyunguduka (nekuti kunyungudika kwewaya yewelding yakakwirira kupfuura ye zinc), uye inoyangarara pamusoro pemvura.
Iyo aruminiyamu inopindirana nemhangura kana sirivha yakaputirwa pasi pezinc layer, uye panguva imwe chete iyo mhangura kana sirivheri inonyunguduka mualuminium, iyo inogona kuumba zviri nani welded joint. Inogona kuwedzera simba resimbi-aluminium welded joints kusvika 197 ~ 213MPa.
Mushure mokunge zvikamu zvesimbi zvakaputirwa, pamusoro pesimbi uye aluminium inogona kurapwa. Kugadziriswa kwepamusoro kwezvikamu zvealuminium kunobviswa ne15% ~ 20% NaOH kana KOH mhinduro yekubvisa oxide firimu, yosukurudzwa nemvura yakachena, yozopfuura mu20% HNO3, yakagezwa, uye yakagadzirira kuoma Ita argon arc welding.
Welding zvinhu - sarudza pure aluminium welding wire ine zvishoma nesilicon content, kuitira kuti majoini emhando yepamusoro anogona kuwanikwa. Hazvina kukodzera kushandisa magnesium-containing welding wire (LFS), nokuti ichakurudzira zvakasimba kukura kwe intermetallic compounds uye haigoni kuvimbisa kusimba kwekubatana kwe weld.
Welding nzira - iyo yakaenzana chinzvimbo cheworkpiece, welding waya uye tungsten electrode panguva yewelding.
Kuti udzivise kutsva kusati kwasvika kwesimbi yekuputira pamusoro pesimbi, kana welding yekutanga weld, iyo welding arc inofanirwa kugara ichichengetwa pane yekuzadza simbi; nokuda kwezvinotevera welds, arc inofanira kuchengetwa pafiriji wire uye yakaumbwa weld, kuitira kuti Inogona kudzivisa arc zvakananga kuita pajasi.
Pamusoro pezvo, iyo arc inofamba nepamusoro pedivi realuminium uye waya yealuminium welding inofamba parutivi rwesimbi, kuitira kuti iyo aluminium yemvura inoyerera ichienda kune groove pamusoro peiyo composite yakavharwa simbi, uye iyo yekupfeka haigone kupiswa nguva isati yakwana uye kurasikirwa. kushanda kwayo.
Welding tsanangudzo - iyo argon arc welding yesimbi nealuminium inoshandisa AC simba, imwe ndeyekurova oxide firimu uye kuipwanya, uye inogonawo kubvisa oxide firimu pamusoro pemvura yakanyungudutswa yedziva, kuitira kuti yakanyungudutswa weld simbi inogona kuva. zvakanaka kusanganiswa.
Ikozvino welding inosarudzwa maererano nehupamhi hwehuputi. Kazhinji, kana kukora kweplate kuri 3mm, iko kushivirira kuri 110-130A; apo kukora kweplate iri 6-8mm, iyo welding ikozvino 130-160A;
2) Indirect fusion welding nzira yepakati shanduko zvidimbu. Iyi nzira yewelding ndeyekuisa prefabricated steel-aluminium composite panel pakati pesimbi-aluminium joint kuti vagadzire majoini avo, kureva, simbi-simbi uye aluminiyamu-aruminiyamu majoini. Wobva washandisa yakajairwa fusion welding nzira kupinza simbi imwechete kumativi ese ari maviri zvakateerana.
Kana welding, teerera kune welding aruminiyamu majoini ane hombe shrinkage uye nyore kupisa kupisa kutanga, uye ipapo welding simbi majoini.
Nguva yekutumira: Mar-22-2023
