Insimbi enekhabhoni ephezulu isho insimbi ye-carbon ene-w(C) ephakeme kuno-0.6%, enomkhuba omkhulu wokuba lukhuni kunensimbi ye-carbon-medium, futhi yakhe i-high-carbon martensite, ezwela kakhulu ukwakheka kwemifantu ebandayo.Ngesikhathi esifanayo, isakhiwo se-martensite esakhiwe endaweni ethinteke ukushisa ye-welding sinzima futhi sihlakazekile, okuholela ekunciphiseni okukhulu kwe-plasticity kanye nokuqina kokuhlangana.Ngakho-ke, ukushisela kwensimbi enekhabhoni ephezulu kubi impela, futhi inqubo ekhethekile yokushisela kufanele yamukelwe ukuze kuqinisekiswe ukusebenza kokuhlangana..Ngakho-ke, ngokuvamile akuvamile ukusetshenziswa ezakhiweni ezishiselwe.Insimbi ye-carbon ephezulu isetshenziselwa ikakhulukazi izingxenye zomshini ezidinga ubulukhuni obuphezulu nokumelana nokugqoka, njengama-shafts, amagiya amakhulu nama-couplings.Ukuze ulondoloze insimbi futhi wenze lula ubuchwepheshe bokucubungula, lezi zingxenye zomshini zivame ukuhlanganiswa nezakhiwo ezishiselwe.Ukushiselwa kwezingxenye eziphezulu ze-carbon steel nakho kuhlangatshezwana nayo ekwakhiweni komshini osindayo.Lapho wenza inqubo yokushisela ye-high carbon steel weldment, zonke izinhlobo zezinkinga zokushisela ezingase zenzeke kufanele zihlaziywe ngokucophelela, futhi izinyathelo zenqubo yokushisela kufanele zithathwe.
1. Ukushisela kwe-carbon steel ephezulu
1.1 Indlela yokushisela
Insimbi enekhabhoni ephezulu isetshenziswa kakhulu ezakhiweni ezinobulukhuni obuphezulu nokumelana nokugqoka okuphezulu, ngakho-ke izindlela zokushisela eziyinhloko i-electrode arc welding, brazing kanye ne-arc welding engaphansi kwamanzi.
1.2 Izinto zokushisela
Ukushiselwa kwensimbi ye-carbon ephezulu ngokuvamile akudingi amandla afanayo phakathi kwesihlanganisi nesisekelo sensimbi.Ama-electrode e-hydrogen anamandla aqinile okukhipha i-sulfurization, okuqukethwe kwe-hydrogen engahlukaniseki ephansi yensimbi ediphozithiwe, nokuqina okuhle ngokuvamile kukhethelwa ukushisela i-arc electrode.Lapho amandla ensimbi ye-weld kanye nesisekelo sensimbi edingekayo, i-electrode ephansi ye-hydrogen yezinga elihambisanayo kufanele ikhethwe;lapho amandla ensimbi ye-weld kanye nesisekelo sensimbi engadingeki, i-electrode ephansi ye-hydrogen enezinga lamandla eliphansi kunelesisekelo sensimbi kufanele kukhethwe.I-electrode enezinga eliphezulu lamandla kunensimbi eyisisekelo ayikwazi ukukhethwa.Uma isisekelo sensimbi singavunyelwe ukuba sishiswe ngaphambili ngesikhathi se-welding, ukuze kuvinjwe ukuqhekeka okubandayo endaweni ethintekile ukushisa, ama-electrode ensimbi engenasici ye-austenitic angasetshenziswa ukuthola isakhiwo se-austenite nge-plasticity enhle kanye nokumelana nokuqhekeka okuqinile.
1.3 Ukulungiswa kwe-groove
Ukuze kuncishiswe ingxenye enkulu yekhabhoni ensimbi yokushisela, isilinganiso sokuhlanganisa kufanele sincishiswe, ngakho-ke imisele emise okwe-U noma engu-V ivame ukusetshenziswa ngesikhathi sokushisela, futhi kufanele kuqikelelwe ukuhlanza inkaba namabala kawoyela futhi. ukugqwala ngaphakathi kuka-20mm ezinhlangothini zombili ze-groove.
1.4 Ukushisa kuqala
Uma kushiselwa ngama-electrode ensimbi esakhiwo, kufanele kushiswe ngaphambili ngaphambi kokushiselwa, futhi izinga lokushisa langaphambi kokushisa kufanele lilawulwe ku-250 ° C kuya ku-350 ° C.
1.5 Ukucutshungulwa kwe-Interlayer
Ukuze uthole i-multi-layer multi-pass welding, iphasi yokuqala isebenzisa ama-electrode amancane-diameter kanye ne-low-current welding.Ngokuvamile, i-workpiece ifakwa ku-welding semi-vertical noma induku yokushisela isetshenziselwa ukushwibeka eceleni, ukuze yonke indawo ethintekile ukushisa yensimbi eyisisekelo ishiswe ngesikhathi esifushane ukuze kutholwe imiphumela yokushisa nokugcina ukushisa.
1.6 Ukwelashwa kokushisa kwangemva kokushisela
Ngokushesha ngemva kokushisela, i-workpiece ifakwa esithandweni sokushisa, futhi ukugcinwa kokushisa kwenziwa ku-650 ° C ukuze kukhishwe i-annealing yokucindezeleka.
2. Ukulimala kwe-Welding yensimbi ephezulu ye-carbon kanye nezinyathelo zokuvimbela
Ngenxa yokuthambekela okuphezulu kokuqina kwensimbi ephezulu ye-carbon, imifantu eshisayo nemifantu ebandayo ijwayele ukwenzeka ngesikhathi sokushisela.
2.1 Izinyathelo zokuvimbela imifantu eshisayo
1) Lawula ukwakheka kwamakhemikhali we-weld, lawula ngokuqinile okuqukethwe kwesulfure ne-phosphorus, futhi wandise ngokufanele okuqukethwe kwe-manganese ukuthuthukisa isakhiwo sokushisela nokunciphisa ukuhlukaniswa.
I-2) Lawula ukuma kwe-weld ye-cross-sectional, futhi isilinganiso sobubanzi-kuya-ekujuleni kufanele sibe sikhudlwana ukugwema ukuhlukaniswa phakathi nendawo ye-weld.
I-3) Ukuze uthole ama-weldments ane-rigidity ephezulu, imingcele ye-welding efanele, ukulandelana kwe-welding efanele kanye nesiqondiso kufanele kukhethwe.
I-4) Uma kunesidingo, thatha izinyathelo zokushisa kuqala kanye nezinyathelo zokupholisa kancane ukuvimbela ukuvela kwemifantu eshisayo.
5) Khulisa i-alkalinity ye-electrode noma i-flux ukuze unciphise okuqukethwe kokungcola ekushiseleni futhi uthuthukise izinga lokuhlukaniswa.
2.2 Izinyathelo zokuvimbela imifantu ebandayo.
I-1) Ukushisa ngaphambi kokushisela nokupholisa kancane ngemva kokushisela akukwazi nje ukunciphisa ubulukhuni nokuqina kwendawo ethinteke ukushisa, kodwa futhi kusheshise ukusakazeka kwangaphandle kwe-hydrogen ku-weld.
2) Khetha izinyathelo ezifanele zokushisela.
I-3) Yamukela ukulandelana okufanelekile kokuhlanganiswa nokushisela ukuze unciphise ingcindezi yokuzibamba yamalunga ashiselwe futhi uthuthukise isimo sokucindezeleka sokushisela.
3 .Isiphetho
Ngenxa yokuqukethwe kwekhabhoni ephezulu, ukuqina okuphezulu kanye nokushisela okungekuhle kwensimbi ephezulu ye-carbon, kulula ukukhiqiza isakhiwo se-carbon martensitic ephezulu ngesikhathi sokushisela, futhi kulula ukukhiqiza imifantu yokushisela.Ngakho-ke, lapho welding high carbon steel, inqubo Welding kufanele kukhethwe ngokunengqondo.Futhi thatha izinyathelo ezihambisanayo ngesikhathi ukuze unciphise ukwenzeka kwemifantu yokushisela futhi uthuthukise ukusebenza kwamalunga ashiselwe.
Isikhathi sokuthumela: Jul-18-2023