Insimbi ephehliwe ngokuvamile iwungqimba lwezinc olunamekwe ngaphandle kwensimbi enekhabhoni ephansi, futhi uqweqwe lwezinc ngokuvamile luwugqinsi olungama-20μm. Iphuzu elincibilikayo le-zinc lingama-419°C kanti indawo yokubilisa ingaba ngu-908°C.
I-weld kufanele ipholishwe ngaphambi kokushiselwa
Isendlalelo sikathayela endaweni yokushisela kufanele sipholishwe, ngaphandle kwalokho kuzokwenziwa amabhamuza, izimbobo zesihlabathi, ukushisela okungamanga, njll. Kuzokwenza futhi i-weld ibe brittle futhi inciphise ukuqina.
Ukuhlaziywa kwezici ze-galvanized steel welding
Ngesikhathi sokushisela, i-zinc incibilika ibe uketshezi futhi intante phezu kwechibi elincibilikisiwe noma empandeni ye-weld. I-Zinc ine-solubility enkulu eqinile ku-iron. I-zinc ewuketshezi izoguguleka ngokujulile insimbi yokushisela eduze komngcele wokusanhlamvu, futhi i-zinc-point-point zinc izokwakha "i-liquid metal embrittlement".
Ngesikhathi esifanayo, i-zinc ne-iron kungakha ama-intermetallic brittle compounds. Lezi zigaba eziphukayo zinciphisa ipulasitiki yensimbi yokushisela futhi zikhiqize imifantu ngaphansi kwengcindezi eqinile.
Ama-welding fillet welds, ikakhulukazi ama-fillet welds we-T-joints, kungenzeka ukuthi akhiqize ngokusebenzisa imifantu. Uma insimbi ebilisiwe ishiselwa, ungqimba lwezinc olungaphezulu komsele kanye nonqenqema luzokhipha i-oxidize, luncibilike, luhwamuke ngaphansi kokushisa kwe-arc, futhi lushise intuthu emhlophe nesitimu, okungadala kalula ukushisela.
I-ZnO eyakhiwe yi-oxidation inephuzu eliphezulu lokuncibilika, ngaphezu kuka-1800°C. Uma amapharamitha amancane kakhulu ngesikhathi sokushisela, ukufakwa kwe-slag ye-ZnO kuzokwenzeka. Ngesikhathi esifanayo, njengoba i-Zn iba i-deoxidizer, i-FeO-MnO noma i-FeO-MnO-SiO2 indawo encibilikayo ephansi ye-oxide slag izokwenziwa. Okwesibili, ngenxa yokuhwamuka kwe-zinc, inani elikhulu lentuthu emhlophe lizovuthwa, elizocasula futhi lilimaze umzimba womuntu. Ngakho-ke, ungqimba olunothayela endaweni yokushisela kufanele lupholishwe.
Imishini yokushisela i-Xinfa inezici zekhwalithi ephezulu nenani eliphansi. Ukuze uthole imininingwane, sicela uvakashele:Abakhiqizi Bezinto Zokushisela Nezokusika - Imboni Yokushisela Nokusika YaseChina Nabahlinzeki (xinfatools.com)
Indlela yokulawula inqubo yokushisela insimbi yensimbi?
Ukulungiswa kwangaphambi kokushisela kwensimbi ethathiwe kuyafana naleyo yensimbi enekhabhoni ephansi evamile. Kubalulekile ukuphatha ngokucophelela ubukhulu be-groove kanye nongqimba oluseduze lwama-galvanized. Ukuze ushise, usayizi wegroove kufanele ufane, ngokuvamile u-60°~65°. Igebe elithile kufanele lishiywe, ngokuvamile libe ngu-1.5 ~ 2.5mm. Ukuze unciphise ukungena kwe-zinc ku-weld, ungqimba lwama-galvanized ku-groove lungasuswa ngaphambi kokushiswa.
Emsebenzini wokugada wangempela, ukwenziwa kwemigodi phakathi nendawo futhi akukho nqubo yonqenqema olufiphele kusetshenziswa ukulawula okumaphakathi. Inqubo ye-welding enezingqimba ezimbili inciphisa amathuba okushisela okungaphelele.
Induku ye-welding kufanele ikhethwe ngokusho kwesisekelo sepayipi le-galvanized. Ngokuvamile, i-J422 ivame ukusetshenziselwa insimbi ene-carbon ephansi ngenxa yokusebenza kalula.
Indlela yokushisela: Lapho ushisela ungqimba lokuqala lwezingqimba eziningi zokushisela, zama ukuncibilikisa ungqimba lwezinc futhi uhwamuke futhi uhwamuke ukuze ubalekele ukushisela, okungase kwehlise kakhulu isimo se-zinc ewuketshezi esele endaweni yokushisela.
Uma ushisela ama-fillet welds, zama ukuncibilikisa ungqimba lwezinc kungqimba lokuqala futhi ulwenze luhwamuke futhi luhwamuke ukuze ubalekele ukushisela. Indlela yokuqala ukuhambisa ukuphela kwe-electrode phambili mayelana ne-5 ~ 7mm, bese ubuyela endaweni yokuqala futhi uqhubeke nokushisela phambili ngemva kokuba ungqimba lwe-zinc luncibilika.
Ku-welding evundlile futhi mpo, uma kusetshenziswa ama-electrode ama-slag amafushane afana ne-J427, ukuthambekela kokuluma onqenqemeni kuzoba kuncane kakhulu. Uma kusetshenziswa ubuchwepheshe bokuhambisa induku yangemuva naphambili, kungenzeka ukuthi kutholwe umphumela wokushisela ongenasici.
Isikhathi sokuthumela: Sep-05-2024
