Umbhobho wesinyithi owenziwe ngesinyithi, uneengenelo ezimbini zokuxhathisa umhlwa kunye nobomi benkonzo ende, kwaye ixabiso liphantsi ngokwentelekiso, ngoko ngoku izinga lokusetyenziswa kwalo liya linyuka nangaphezulu, kodwa abanye abasebenzisi abahoyi ngqalelo xa bewelda umbhobho ovuthelweyo. ezinye iingxaki ezingeyomfuneko, ngoko ke zeziphi iingxaki ekufuneka ziqwalaselwe xa udityaniswa nemibhobho eyenziwe ngamazimba?
01 Isiseko kukupolisha
Umaleko owenziwe ngegalvanized kwi-weld kufuneka uphuculwe, ngaphandle koko kuya kwenzeka amaqamza, trachoma, i-welding yobuxoki, njl. Kwakhona kuya kwenza i-weld ibe brittle kwaye inciphise ukuqina.
02 Iimpawu ze-Welding zetsimbi ekhandiweyo
Intsimbi yegalvanized ngokuqhelekileyo iqatywe ngomaleko we-zinc ngaphandle kwentsimbi yekhabhoni ephantsi, kwaye umaleko owenziwe ngamazinga ngokubanzi ungqindilili we-20um. IZinc ineqondo lokunyibilika elingama 419°C kunye neqondo lokubila elimalunga nama-908°C. Ngexesha le-welding, i-zinc inyibilika ibe lulwelo oludada phezu komphezulu wedama elinyibilikisiweyo okanye kwingcambu ye-weld. I-Zinc ine-solubility enkulu eqinileyo kwi-iron, kwaye ulwelo lwe-zinc luya kukhukulisa isinyithi se-weld nzulu ecaleni komda wengqolowa, kwaye i-zinc enendawo ephantsi yokunyibilika iya kwenza "i-liquid metal embrittlement". Ngelo xesha, i-zinc kunye nentsimbi inokwenza i-intermetallic brittle compounds, kwaye ezi zigaba ze-brittle zinciphisa iplastiki yentsimbi ye-weld kwaye ibangele ukuqhekeka phantsi kwesenzo soxinzelelo. Ukuba i-welds ye-fillet i-welded, ngakumbi i-fillet welds ye-T-joints, ii-cracks zokungena zinokuthi zenzeke. Xa intsimbi ye-galvanized idityanisiwe, i-zinc layer kwi-groove surface kunye nomphetho uya kuba ne-oxidized, inyibilike, i-evaporated kunye nomsi omhlophe kunye nomphunga uya kuguquguquka phantsi kwesenzo sobushushu be-arc, okuya kubangela lula i-weld pores. I-ZnO eyenziwe ngenxa ye-oxidation inendawo ephezulu yokunyibilika, ngaphezu kwe-1800 ° C. Ukuba iiparamitha zincinci kakhulu ngexesha lenkqubo ye-welding, iya kubangela ukufakwa kwe-slag ye-ZnO, kwaye ngexesha elifanayo. Ekubeni i-Zn iba yi-deoxidizer. Ukuvelisa i-FeO-MnO okanye i-FeO-MnO-SiO2 indawo ephantsi yokunyibilika kwe-oxide slag. Okwesibini, ngenxa ye-evaporation ye-zinc, umsi omkhulu womsi omhlophe uguquguqukayo, ocaphukisayo kwaye unobungozi kumzimba womntu. Ngoko ke, i-galvanized layer kwindawo ye-welding kufuneka iphuculwe kwaye ilahlwe.
03 Ulawulo lwenkqubo yeWelding
Ukulungiswa kwangaphambili kwe-welding yensimbi ye-galvanized kufana neyokuqhelekileyo kwentsimbi ephantsi kwekhabhoni. Kufuneka kuqatshelwe ukuba ubukhulu be-groove kunye noluhlu olusondeleyo lwe-galvanized kufuneka luphathwe ngokucophelela. Ukungena, ubukhulu be-groove kufuneka bufaneleke, ngokubanzi 60 ~ 65 °, kunye ne-gap ethile, ngokubanzi 1.5 ~ 2.5mm; ukwenzela ukunciphisa ukungena kwe-zinc kwi-weld, i-galvanized groove kwi-groove ingaba yi-Solder emva kokuba umaleko ususiwe.
Kumsebenzi wokwenyani, i-beveling esembindini, akukho nkqubo i-blunt edge yamkelwa kulawulo oluphakathi, kunye nenkqubo ye-welding emibini inciphisa ithuba lokungena okungaphelelanga. Intonga ye-welding kufuneka ikhethwe ngokwezinto ezisisiseko zombhobho wensimbi. Kwintsimbi yekhabhoni ephantsi ngokubanzi, kuqhelekile ukukhetha i-J422 ngenxa yokuqwalaselwa kokulula kokusebenza.
Indlela yokuwelda: Xa udibanisa umaleko wokuqala we-weld welding kwi-welding multi-layer, zama ukunyibilikisa umaleko we-zinc kwaye uwenze ube ngumphunga, ube ngumphunga kwaye ubaleke i-weld seam, enokunciphisa kakhulu i-zinc engamanzi eseleyo kwi-weld seam. Xa udibanisa i-weld ye-fillet, zama ukunyibilikisa i-zinc layer kwi-maleko yokuqala kwaye uyenze ibe ngumphunga kwaye ibe ngumphunga ukubaleka i-weld. Indlela yokuhambisa isiphelo se-electrode phambili malunga ne-5 ~ 7mm, xa i-zinc layer Emva kokunyibilika, buyela kwindawo yokuqala kwaye uqhubeke udibanisa phambili. Kwi-welding ethe tyaba kunye ne-vertical welding, ukuba i-electrode ye-slag emfutshane efana ne-J427 isetyenzisiweyo, ukuthambekela kokunciphisa kuya kuba kuncinci; ukuba iteknoloji yezothutho ezihamba ngasemva nangaphambili zisetyenziswa, umgangatho we-welding ongenasiphako unokufumaneka.
Ixesha lokuposa: Mar-15-2023
