Indlela yokwelapha ukushisa kwe-induction welding welding

Insimbi yamapayipi iwuhlobo oluyinhloko lwensimbi okushisela kwayo kudinga ukwelashwa okushisa ukuze kuthuthukiswe izakhiwo zemishini. Izinsimbi ezisetshenziswa emabangeni ensimbi ahlukene amandla kanye nezidingo zazo zamandla okushisa kwegumbi zibhalwe kuThebula 6-2. Ngokusekelwe ezinhlotsheni zensimbi kanye nezakhiwo zemishini ezibalwe kuThebula 6-2, izindlela zokwelashwa eziyinhloko zokushisa zokuthuthukisa ukusebenza okuphelele kwama-welds zihlanganisa ukwelashwa okujwayelekile, ukwelapha okujwayelekile + ukuthulisa, ukucisha + ukwelashwa kokushisa nezinye izindlela. Njengamanje, ukwelashwa kwe-weld normalizing kusetshenziswa kakhulu ekukhiqizeni amapayipi ashiselwe ezifuywayo, futhi ezinye izindlela zokwelapha ukushisa azikakamukelwa. Ukwelashwa kokushisa kwe-weld okuthuthuke kakhulu ulayini wokukhiqiza wokucisha nowokuqinisa. Ukwelashwa okujwayelekile kusetshenziswa kakhulu emigqeni yokukhiqiza amapayipi ashiselwe ngezinga elikhulu phesheya, futhi ukwelashwa kokucisha nokuzolisa kusetshenziswa izinkampani ngazinye e-Japan kanye ne-European Union. Ukucisha ukushisa kwe-induction kanye nokwelashwa kokushisa kwama-welds kuyisiqondiso sentuthuko yesikhathi esizayo.

Ithebula 6-2 Ibanga elijwayelekile lensimbi namandla okushisa kwegumbi lensimbi yamapayipi

(1) Ukwelashwa kwe-weld induction ukushisisa okujwayelekile kuhlanganisa nokwelashwa kwe-annealing, ngezinye izikhathi okubizwa ngokuthi i-stress annealing. I-induction heat normalizing inqubo ye-weld ukushisa i-weld ekushiseni okungaphezu kwe-Ae, bese ipholisa umoya ibe ngaphansi kuka-400 ° C futhi ipholiswe ngamanzi ekamelweni lokushisa ngemva kuka-900 ~ 950 ° C. Ngale ndlela, ukucindezeleka kwangaphakathi kwe-welding kuqedwa, okusanhlamvu kwe-weld kucwengisiswe, i-microstructure ithuthukisiwe, futhi ipulasitiki kanye nokuqina komthelela we-weld kuyathuthukiswa. Ukwelapha okujwayelekile kokushisisa kwe-weld kulungele insimbi ene-alloy ephansi kanye nezinsimbi ezine-alloy ephezulu ezinamandla, okulingana namapayipi ashiselwe ngaphansi kwebanga lensimbi engu-X60. I-welding seam induction heat annealing treatment iwukushisa i-welding seam ibe yi-700 ~ 750 ° C ye-dual-phase zone, bese ipholisa umoya ekamelweni lokushisa, inhloso ukuqeda ukucindezeleka kwangaphakathi kwe-welding nokuthuthukisa ipulasitiki. Ukwelashwa kwe-annealing kusetshenziselwa ikakhulukazi i-carbon steel kanye namanye amapayipi ashiselwe insimbi ene-alloy ephansi. Le nqubo ayivamile ukusetshenziswa emigqeni yokukhiqiza amapayipi ashiselwe.

(2) Ukushisa kwe-weld induction normalizing + ukwelashwa kokushisa Ngemva kokwelashwa okujwayelekile, lapho ubulukhuni be-weld busephezulu futhi i-plasticity isephansi, ukwelashwa kokushisa okuphezulu kungasetshenziswa ukukulungisa. Ukushisisa nokufudumeza kwe-induction ukushisisa i-weld ibe izinga lokushisa elingaphansi kwe-Ad , imvamisa engaba ngu-650 ℃ bese kupholiswa ngomoya. Ngemuva kokwelashwa kokushisa okuphezulu kokushisa, isakhiwo se-martensite ensimbi eluhlaza siguqulwa sibe yi-sorbite epholile kanye ne-ferrite, i-plasticity ye-weld iyathuthukiswa, ukuqina kuyancishiswa, futhi amandla ashintsha kancane. eziyishumi le ndlela yokwelapha ukushisa, eyaziwa nangokuthi i-quenching, i-quenching kanye ne-induction yokushisa umugqa we-weld wokushisa ubuchwepheshe obuphambili kakhulu. Ngemuva kokucisha nokushisa, izici ezibanzi zemishini ye-welding seam ifinyelela ngokuphelele ezingeni lomzimba wepayipi, ibona ukufana kwe-welding seam kanye nokusebenza komzimba wepayipi. Umnyombo walobu buchwepheshe bokwelapha ukushisa wukuba yingcweti kobuchwepheshe bokushisa kazibuthe obunqamulayo ukuze kuqinisekiswe ukufana nokunemba kwezinga lokushisa lokushisa. Okwensimbi ene-alloy high-stretch kanye namashisela ensimbi anamandla amakhulu ahlanganisiwe, izinga lokushisa elicishayo lingu-900 ~ 950 ℃, izinga lokushisa elipholile lingu-600 ~ 650 ° C, ukucisha kwamukela ukupholisa isifutho, futhi ukushisa kwamukela umoya. ukupholisa nokupholisa amanzi. Hlanganisa ukupholisa. Lapho izinga lokushisa lokucisha nokushisa lishiswa yi-longitudinal magnetic field, ukunemba kokulawula izinga lokushisa kungafinyelela ku-± 10 ° C, okuyizinga lokushisa elidingekayo lokulawula izinga lokushisa lamapayipi ahlanganisiwe aqinile ukuze agcine ukusebenza okuzinzile. Ukusebenzisa amashisela okushisa enkundla eguquguqukayo nakho kudinga ukulawula izinga lokushisa elinemba okuphezulu • okwamanje • I-China isesigabeni sokuthuthuka, kusukela ekunembeni kwalo mehluko omkhulu. Kodwa-ke, kukholakala ukuthi lobu buchwepheshe bokushisa buzonqotshwa maduzane, futhi i-weld seam izoshiswa futhi ifakwe ukushisa kwe-online induction.