(1) I-Weldability yentsimbi kunye ne-aluminium kunye ne-alloys yayo
I-iron, i-manganese, i-chromium, i-nickel kunye nezinye izinto kwintsimbi zinokuxutywa kunye ne-aluminiyam kwimeko yolwelo ukwenza isisombululo esiqinileyo esilinganiselweyo, kwaye zenze iikhompawundi ze-intermetallic. Ikhabhoni ekwintsimbi inokwenza iikhompawundi kunye ne-aluminiyam, kodwa ziphantse zingahambelani nenye kwindawo eqinileyo. nyibilikisa. Phakathi kwemixholo eyahlukeneyo ye-aluminium kunye nentsimbi, iintlobo ezahlukeneyo ze-brittle intermetallic compounds zinokuqulunqwa, phakathi kwazo i-FeAls iyona brittle kakhulu.
Inempembelelo ebalulekileyo kwiipropati zemishini ye-welded joints of steel and aluminium, kubandakanywa ne-microhardness. Ukongezelela, ekubeni iipropati ze-thermophysical zensimbi, i-aluminium kunye ne-alloys yazo zihluke kakhulu, i-weldability yensimbi kunye ne-aluminium iyancipha.
(2) Inkqubo ye-Welding yentsimbi kunye ne-aluminium kunye ne-alloys yayo
Ukususela kolu hlalutyo lukhankanywe ngasentla lwe-steel-aluminium weldability, phantse akunakwenzeka ukunciphisa ukucuthwa kwentsimbi kunye ne-aluminium kunye ne-alloys yayo ngokudibanisa ngokuthe ngqo i-fusion welding.
Kuphantse ukuba akunakwenzeka ukusebenzisa isinyithi okanye i-alloy eneempawu ze-thermal eziphathekayo phakathi kwentsimbi kunye ne-aluminium kwaye enokuthi ihambelane ne-metallurgically kunye nezi zimbini njengentsimbi yokuzalisa ukuwelda ngokuthe ngqo.
Kumsebenzi wemveliso, kukho iindlela ezimbini: umaleko wokugquma welding engathanga ngqo edityanisiweyo kunye neqhekeza eliphakathi lenguquko engathanga ngqo.
1) Umaleko wokugquma ngendlela yewelding engathanga ngqo Ngaphambi kokuba intsimbi kunye ne-aluminiyam zidityaniswe, enye okanye iileya ezininzi zetsimbi ezinokudityaniswa ngesinyithi esifanelekileyo kunye nesinyithi esifanelekileyo, zifakwe ngaphambili kumphezulu wentsimbi ukwenza umaleko wangaphambili, kwaye emva koko. esetyenzisiweyo Igesi tungsten arc welding indlela Indlela yokuwelda intsimbi egqunywe nge-aluminiyam.
Ingqinwe ngokuziqhelanisa novavanyo:
Uluhlu olulodwa lokugubungela lunokuthintela kuphela i-oxidation yesiseko sesinyithi, kodwa ayikwazi ukuthintela ukuveliswa kweengqungquthela ze-intermetallic, kwaye amandla ayo adibeneyo asephantsi kakhulu. Ngoko ke, i-argon arc welding yentsimbi kunye ne-aluminium kufuneka iqhutywe nge-coating composite.
Kukho izinto ezininzi zentsimbi zokugquma, ezifana neNi, Cu, Ag, Sn, Zn njalo njalo. Izinto zokugquma zetsimbi zihlukile, kwaye umphumo emva kwe-welding ukwahluka. Iintanda kulula ukwenza kwi Ni, Cu, Ag composite ukutyabeka; Ni, Cu, Sn composite ukutyabeka kungcono; I-Ni, i-Zn ye-composite coating inesiphumo esihle kakhulu.
I-argon arc welding ye-composite coated carbon steel kunye ne-aluminiyam kunye ne-alloys yayo kukuqala ukwambathisa umaleko wentsimbi efana nobhedu okanye isilivere kwicala lentsimbi, kwaye emva koko ugqume umaleko we-zinc. Xa i-welding, i-zinc inyibilika kuqala (kuba indawo yokunyibilika yocingo lwe-welding iphezulu kune-zinc), kwaye idada phezu kwamanzi.
I-aluminiyam iphendula nge-copper okanye i-silver plating phantsi kwe-zinc layer, kwaye kwangaxeshanye ubhedu kunye okanye isilivere inyibilika kwi-aluminiyam, enokuthi yenze i-welded joint engcono. Inokunyusa amandla entsimbi-aluminiyam edibeneyo edibeneyo kwi-197 ~ 213MPa.
Emva kokuba iindawo zetsimbi zifakwe, umphezulu wensimbi kunye ne-aluminium unokunyangwa. Ukunyangwa kwendawo ye-aluminium kuchithwa nge-15% ~ 20% ye-NaOH okanye isisombululo se-KOH sokususa ifilimu ye-oxide, ihlanjululwe ngamanzi acocekileyo, emva koko idluliselwe kwi-20% ye-HNO3, ihlanjululwe, kwaye ilungele ukomisa Yenza i-argon arc welding.
Izinto ze-welding - khetha i-aluminium ecocekileyo yocingo kunye nomxholo ongaphantsi kwe-silicon, ukwenzela ukuba kufumaneke amajoyina aphezulu. Akufanelekanga ukusebenzisa i-magnesium-containing welding wire (LFS), kuba iya kukhuthaza kakhulu ukukhula kwe-intermetallic compounds kwaye ayinakuqinisekisa amandla e-weld joint.
Indlela ye-Welding - indawo ehambelanayo ye-workpiece, i-welding wire kunye ne-tungsten electrode ngexesha lokudibanisa.
Ukuze kuthintelwe ukutshiswa kwangaphambili kwentsimbi yentsimbi, xa udibanisa i-weld yokuqala, i-arc welding kufuneka ihlale igcinwe kwi-filler metal; kwi-welds elandelayo, i-arc kufuneka igcinwe kwi-filler wire kunye ne-weld ebunjiweyo, ukuze Ikwazi ukuphepha i-arc ngokuthe ngqo kwi-coating.
Ukongeza, i-arc ihamba ecaleni komphezulu wecala le-aluminium kunye nocingo lwe-aluminium welding luhamba ecaleni kwecala lentsimbi, ukuze i-aluminiyam engamanzi impompoze kumphezulu we-groove yentsimbi edityanisiweyo, kwaye ukugquma akukwazi ukutshiswa ngaphambi kwexesha kwaye kulahlekelwe. isiphumo sayo.
Inkcazo ye-welding - i-argon arc welding yentsimbi kunye ne-aluminium isebenzisa amandla e-AC, enye kukubetha ifilimu ye-oxide kwaye iyaphule, kwaye inokususa ifilimu ye-oxide phezu komphezulu wedama elityhidiweyo, ukuze isinyithi esityhidiweyo sidibanise idityaniswe kakuhle.
I-welding current ikhethwa ngokobunzima be-weldment. Ngokuqhelekileyo, xa ubukhulu beplate buyi-3mm, i-welding current yi-110-130A; xa ubukhulu beplate buyi-6-8mm, i-welding current yi-130-160A;
2) Indlela ye-welding ye-fusion engathanga ngqo kwiziqwenga zenguqu ephakathi. Le ndlela ye-welding kukubeka i-prefabricated steel-aluminium composite panel phakathi kwe-steel-aluminiyam edibeneyo ukuze yenze amajoyina abo, oko kukuthi, i-steel-steel kunye ne-aluminium-aluminium joints. Emva koko sebenzisa indlela ye-welding ye-fusion yesiqhelo ukuwelda isinyithi esifanayo kuzo zombini iziphelo ngokulandelelanayo.
Xa welding, ingqalelo ukuwelda amalunga aluminiyam kunye shrinkage enkulu kunye nokuqhekeka lula thermal kuqala, kwaye ke ukuwelda amalunga entsimbi.
Ixesha lokuposa: Mar-22-2023
