Ipayipi lensimbi eliphehliwe, linezinzuzo ezimbili zokumelana nokugqwala kanye nempilo ende yesevisi, futhi intengo iphansi, ngakho manje izinga layo lokusetshenziswa liya ngokuya likhuphuka, kodwa abanye abasebenzisi abanaki lapho beshisela ipayipi likathayela, Kubangele. ezinye izinkinga ezingadingekile, ngakho-ke yiziphi izinkinga okufanele zinakwe lapho ushisela amapayipi akhandisiwe?
01 Inhloso ukupholisha
Ungqimba olunothayela endaweni yokushisela kufanele lupholishwe, ngaphandle kwalokho kuzovela amabhamuza, i-trachoma, ukushisela okungamanga, njll. Kuzokwenza futhi i-weld ibe brittle futhi inciphise ukuqina.
02 Izici zokushisela zensimbi
Insimbi ephehliwe ngokuvamile imbozwa ungqimba lwe-zinc ngaphandle kwensimbi enekhabhoni ephansi, kanti ungqimba oluwuthayela ngokuvamile luwugqinsi oluwu-20um. I-Zinc inephuzu lokuncibilika elingu-419°C kanye nephuzu lokubila elicishe libe ngu-908°C. Ngesikhathi sokushisela, i-zinc incibilika ibe uketshezi oluntanta phezu kwechibi elincibilikisiwe noma empandeni ye-weld. I-Zinc inokuncibilika okukhulu okuqinile ku-iron, futhi uketshezi lwe-zinc luzoguguleka insimbi yokushisela ngokujulile eduze komngcele wokusanhlamvu, futhi i-zinc enephuzu eliphansi lokuncibilika izokwakha "i-liquid metal embrittlement". Ngesikhathi esifanayo, i-zinc nensimbi zingakha ama-intermetallic brittle compounds, futhi lezi zigaba ze-brittle zinciphisa i-plasticity yensimbi ye-weld futhi zidale imifantu ngaphansi kwesenzo sokucindezeleka okuqinile. Uma ama-welds e-fillet e-welded, ikakhulukazi ama-welds we-fillet we-T-joints, ukuqhekeka kokungena kungenzeka kakhulu. Lapho insimbi ebilisiwe ishiselwe, ungqimba lwezinc endaweni ye-groove kanye nonqenqema luzofakwa i-oxidized, luncibilike, luhwamuke futhi lushube intuthu emhlophe kanye nesimusi kuzovuthwa ngaphansi kwesenzo sokushisa kwe-arc, okuzobangela kalula izimbotshana zokushisela. I-ZnO eyakhiwe ngenxa ye-oxidation inephuzu eliphezulu lokuncibilika, ngaphezu kuka-1800°C. Uma imingcele incane kakhulu ngesikhathi senqubo yokushisela, izobangela ukufakwa kwe-slag ye-ZnO, futhi ngesikhathi esifanayo. Njengoba i-Zn iba i-deoxidizer. Khiqiza i-FeO-MnO noma i-FeO-MnO-SiO2 iphoyinti elincibilikayo eliphansi le-slag le-oxide. Okwesibili, ngenxa yokuhwamuka kwe-zinc, inani elikhulu lentuthu emhlophe liyavuthwa, elicasulayo futhi eliyingozi emzimbeni womuntu. Ngakho-ke, ungqimba olunama-galvanized endaweni yokushisela kufanele luphuculwe futhi lulahlwe.
03 Ukulawulwa kwenqubo yokushisela
Ukulungiswa kwangaphambi kokushisela kwensimbi ethathiwe kuyafana naleyo yensimbi enekhabhoni ephansi evamile. Kumele kuqashelwe ukuthi ubukhulu be-groove kanye nongqimba oluseduze lwama-galvanized kufanele luphathwe ngokucophelela. Ukuze kungene, usayizi wegroove kufanele ulungele, ngokuvamile u-60 ~ 65 °, ube negebe elithile, ngokuvamile u-1.5 ~ 2.5mm; ukuze kuncishiswe ukungena kwe-zinc ku-weld, i-groove galvanized in the groove ingaba yi-Solder ngemva kokususwa kongqimba.
Emsebenzini wangempela, i-beveling emaphakathi, akukho nqubo enqenqemeni engacacile eyamukelwayo yokulawula okuphakathi, futhi inqubo yokushisela enezingqimba ezimbili inciphisa amathuba okungena okungaphelele. Induku ye-welding kufanele ikhethwe ngokusho kwesisekelo sepayipi yensimbi yama-galvanized. Ngensimbi ye-carbon ephansi evamile, kuvame kakhulu ukukhetha i-J422 ngenxa yokucatshangelwa kokusebenza kalula.
Indlela yokushisela: Lapho ushisela ungqimba lokuqala lwe-weld seam ekushiseleleni okunezingqimba eziningi, zama ukuncibilikisa ungqimba lwezinc futhi ulwenze luhwamuke, luhwamuke futhi ubalekele umthungo wokushisela, okunganciphisa kakhulu i-zinc ewuketshezi esele emthungo wokushisela. Lapho ushisela i-weld ye-fillet, zama futhi ukuncibilikisa ungqimba lwezinc kungqimba lokuqala futhi ulwenze luhwamuke futhi luhwamuke ukuze ubalekele ukushisela. Indlela iwukuhambisa ukuphela kwe-electrode phambili mayelana ne-5 ~ 7mm, lapho ungqimba lwezinc Ngemva kokuncibilika, buyela endaweni yokuqala futhi uqhubeke nokushisela phambili. Ukuze uthole i-welding enezingqimba kanye ne-welding eqondile, uma kusetshenziswa ama-electrode ama-slag amafushane afana ne-J427, ukuthambekela kokuncishiswa kuzoba kuncane; uma kusetshenziswa ubuchwepheshe bokuhamba phambili nokubuyela emuva busetshenziswa, ikhwalithi yokushisela engenasici ingatholakala.
Isikhathi sokuthumela: Mar-15-2023
