Intsimbi ekhuselweyo idla ngokuba ngumaleko we-zinc oqatywe ngaphandle kwentsimbi enekhabhoni ephantsi, kwaye i-zinc idla ngokuba yi-20μm ubukhulu. Indawo yokunyibilika i-zinc yi-419°C kwaye indawo yokubila imalunga ne-908°C.
I-weld kufuneka ikhazimliswe phambi kwe-welding
Umaleko owenziwe igalvanized kwi weld kufuneka upolishwe, kungenjalo kuya kuveliswa amaqamza, imingxuma yesanti, ukuwelda okungeyonyani, njl.njl. Kwakhona kuya kwenza i-weld ibe brittle kwaye inciphise ukuqina.
Uhlalutyo lweempawu ze-galvanized steel welding
Ngexesha le-welding, i-zinc inyibilika ibe yi-liquid kwaye idada phezu komphezulu we-pool etyhidiweyo okanye kwingcambu ye-weld. I-Zinc inonyibiliko olukhulu oluqinileyo kwintsimbi. I-zinc yolwelo iya kukhukulisa ngokunzulu intsimbi ye-weld ecaleni komda wengqolowa, kwaye i-zinc ephantsi-enyibilikayo iya kwenza "i-liquid metal embrittlement".
Kwangaxeshanye, i-zinc kunye nentsimbi zinokwenza i-intermetallic brittle compounds. Ezi zigaba ze-brittle zinciphisa iplastiki yentsimbi ye-weld kwaye ivelise iintanda phantsi koxinzelelo lwe-tensile.
I-Welding fillet welds, ngakumbi i-fillet welds ye-T-joints, inokwenzeka ukuba ivelise ngokuqhekeka. Xa intsimbi ekhandisiweyo idityanisiwe, umaleko we-zinc kumphezulu we-groove kunye nomphetho uya ku-oxidize, unyibilike, ube ngumphunga phantsi kwesenzo sobushushu be-arc, kunye ne-volatilize umsi omhlophe kunye nomphunga, onokubangela lula i-weld porosity.
I-ZnO eyenziwe yi-oxidation inendawo ephezulu yokunyibilika, ngaphezulu kwe-1800°C. Ukuba iiparamitha zincinci kakhulu ngexesha le-welding, ukufakwa kwe-slag ye-ZnO kuya kwenzeka. Ngexesha elifanayo, ekubeni i-Zn iba yi-deoxidizer, i-FeO-MnO okanye i-FeO-MnO-SiO2 indawo ephantsi yokuncibilika kwe-oxide slag iya kuveliswa. Okwesibini, ngenxa ye-evaporation ye-zinc, umsi omkhulu womsi omhlophe uya kuhlanjululwa, oya kucasula kwaye ulimaze umzimba womntu. Ngoko ke, umaleko owenziwe ngegalvanized kwindawo ye-welding kufuneka ucocwe.
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Indlela yokulawula inkqubo ye-welding steel galvanized?
Ukulungiswa kwangaphambili kwe-welding yentsimbi ye-galvanized kuyafana neyonke yentsimbi ephantsi kwekhabhoni. Kubalulekile ukuphatha ngokucophelela ubukhulu be-groove kunye noluhlu olusondeleyo lwamagalvanized. Ukuze udibanise, ubungakanani begroove kufuneka bufaneleke, ngokubanzi 60 ° ~ 65 °. Umsantsa othile kufuneka ushiywe, ngokubanzi 1.5 ~ 2.5mm. Ukuze kuncitshiswe ukungena kwe-zinc kwi-weld, i-galvanized layer kwi-groove ingasuswa ngaphambi kokuba i-welding.
Kumsebenzi wokongamela, ukwenziwa kwegroove esembindini kwaye akukho nkqubo ibuthuntu yomphetho isetyenziselwa ulawulo oluphakathi. Inkqubo ye-welding ye-welding emibini inciphisa ithuba lokungagqibekanga kwe-welding.
Intonga ye-welding kufuneka ikhethwe ngokwezinto ezisisiseko zombhobho we-galvanized. Ngokuqhelekileyo, i-J422 isetyenziswa ngokuqhelekileyo kwintsimbi ye-carbon ephantsi ngenxa yokusebenza lula.
Ubuchule bokuwelda: Xa udibanisa umaleko wokuqala we-welds ezininzi, zama ukunyibilikisa umaleko we-zinc kwaye ube ngumphunga kwaye ube ngumphunga ukuze ubaleke i-weld, enokunciphisa kakhulu imeko ye-zinc engamanzi eseleyo kwi-weld.
Xa i-welding fillet welds, zama ukunyibilikisa i-zinc layer kwinqanaba lokuqala kwaye uyenze ibe ngumphunga kwaye ibe ngumphunga ukubaleka i-weld. Indlela yokuqala ukuhambisa isiphelo se-electrode phambili malunga ne-5 ~ 7mm, kwaye emva koko ubuyele kwindawo yokuqala kwaye uqhubeke udibanisa phambili emva kokuba i-zinc layer iyanyibilika.
Kwi-welding ethe tyaba kunye nethe nkqo, ukuba i-electrode ye-slag emfutshane efana ne-J427 isetyenzisiwe, ukuthambekela kokuluma komphetho kuya kuba kuncinci kakhulu. Ukuba iteknoloji ehamba ngasemva nangaphambili isetyenzisiweyo, kunokwenzeka ukuba ufumane umphumo we-welding ongenasiphako.
Ixesha lokuposa: Sep-05-2024
