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Njengomthombo wamandla ahlanzekile, amandla omoya athuthuke ngokushesha eminyakeni yamuva. Ngokuthuthukiswa kwemishini yamandla omoya, amapuleti ensimbi asetshenziswayo aya ngokuya eba mkhulu, kanti amanye asedlule ku-100mm, okubeka phambili izidingo eziphakeme zokushisela. Njengamanje, i-Q355 noma i-DH36 isetshenziswa kakhulu kumishini yamandla omoya, futhi izindlela zokushisela ngokuvamile zikhetha i-flux cored wire gas protection welding (FCAW) kanye ne-submerged arc welding (SAW).
Enqubweni yokukhiqiza umbhoshongo wenjini yomoya, imifantu emihle ijwayele ukwenzeka emugqeni wokuhlanganisa noma indawo ethinteke ekushiseni ngemva kokushiselwa kohlaka lomnyango, futhi lapho ipuleti lensimbi lijiya, kuyanda ukuthambekela kokuqhekeka. Isizathu sibangelwa i-superposition ephelele yokucindezeleka, izinga lokushisa lokushisela, ukulandelana kwe-welding, i-hydrogen aggregation, njll.
1, Ukukhethwa Welding okudlekayo
Ngenxa yokuthi ingxenye yokushisela ibaluleke kakhulu, kuyadingeka ukuba ukhethe izinto zokushisela ezinokuqukethwe okuphansi kokungcola, ukuqina okuhle nokumelana nokuqhekeka okuhle, njenge-GFL-71Ni yethu (GB/T10045 T494T1-1 C1 A, AWS A5.20 E71T-1C) -J).
Ukusebenza okujwayelekile kwemikhiqizo ye-GFL-71Ni:
● Okuqukethwe kwesici sokungcola okuphansi kakhulu, i-P+S ≤0.012% (wt%) ingalawulwa.
● Excellent elongation plasticity, elongation ngemva kwekhefu≥27%.
● Ukuqina komthelela okuhle kakhulu, -40 °C anomthelela wamandla okumunca ≥ ngaphezu kuka-100J.
● Ukusebenza okuhle kakhulu kwe-CTOD.
● Okuqukethwe kwe-hydrogen okusabalalisa i-H5 noma ngaphansi.
2, Welding inqubo control
(1) Ukushisa kwangaphambi kokushisela kanye nokulawula izinga lokushisa phakathi kwamashaneli
Ngokubhekiselwa kumazinga afanelekile nolwazi olubanzi lwesikhathi esidlule, kunconywa ukuthi ukhethe ukushisa kwangaphambili kanye nezinga lokushisa eliphakathi kwamashaneli:
● 20~38mm ugqinsi, izinga lokushisa elishisayo ngaphambi kuka-75 °C.
● 38~65mm ugqinsi, izinga lokushisa elishisayo ngaphambi kuka-100 °C.
● Ngaphezulu kokungu-65mm ubukhulu, izinga lokushisa elishisayo ngaphambi kuka-125°C.
Ebusika, ukulahlekelwa ukushisa kudinga ukucatshangelwa, ngakho-ke kufanele kulungiswe ngo-30~50 °C ngalesi sisekelo.
(2) I-workpiece kufanele ifudunyezwe ngokuqhubekayo phakathi nenqubo yokushisela ukuze kugcinwe izinga lokushisa elanele le-inter-channel
● 20~38mm ubukhulu, kutuswa ukulawula izinga lokushisa phakathi kwamashaneli 130~160 °C.
● 38~65mm ubukhulu, kunconywa ukulawula izinga lokushisa phakathi kwamashaneli angu-150~180 °C.
● Ugqinsi olungaphezu kuka-65mm, kunconywa ukulawula izinga lokushisa phakathi kwamashaneli angu-170~200 °C.
Ithuluzi lokukala izinga lokushisa lingcono kakhulu ukusebenzisa okokukala izinga lokushisa lokuxhumana, noma ipeni lokulinganisa lokushisa elikhethekile.
3. Ukulawulwa kokucaciswa kwe-Welding
| Welding wire Diameter | Amapharamitha anconyiwe | Okokufaka kokushisa |
| 1.2 mm | 220-280A/26-30V 300mm/min | 1.1-2.0KJ/mm |
| 1.4 mm | 230-300A/26-32V 300mm/min | 1.1-2.0KJ/mm |
Qaphela 1: I-current encane kufanele ikhethelwe i-welding engezansi, futhi isembozo sokugcwalisa singaba sikhulu ngokufanele, kodwa akufanele sidlule inani elinconywayo.
Qaphela 2: Ububanzi be-weld bead eyodwa akufanele budlule u-20mm, futhi ubuhlalu bokushisela kufanele buhlelwe ngokuvumelana nesimo sangempela. Uma i-groove ibanzi, i-multi-pass welding kufanele isetshenziswe, okuzuzisa ukucwenga okusanhlamvu.
4. Ukulawula ukulandelana kwe-Welding
Kungcono ukusebenzisa i-welding ye-symmetrical ye-multi-person for welds annular, enganciphisa kakhulu ukucindezeleka kwe-shrinkage, futhi i-welding ye-symmetrical yabantu abangu-4 ingcono kune-welding ye-2-person symmetrical.
5, Ukususwa kwe-hydrogen phakathi kokushisela
Ukukhishwa kwe-hydrogen engxenyeni ephakathi kuyisilinganiso esithathwa ngokumelene nokunqwabelana kwe-hydrogen ehlakazekayo ekushiseleni amapuleti awugqinsi. Ucwaningo lubonisa ukuthi umphumela usobala kumapuleti awugqinsi amakhulu kuno-70mm. Inqubo yokusebenza imi kanje:
● Misa ukushisela cishe ku-2/3 wabo bonke ubuhlalu.
● I-Dehydrogenation 250-300℃×2~3h.
● Qhubeka nokushisela kuze kuqedwe ukukhishwa kwe-hydrogen.
● Ngemva kokushisela, mboza ngokotini owuhlukanisayo futhi uphole kancane ngokulingana nezinga lokushisa elilingana negumbi.
6. Ezinye izindaba ezidinga ukunakwa
● Ngaphambi kokushisela, ama-bevel kufanele ahlanzeke futhi ahlanzeke.
● Ukushukuma komzimba kufanele kugwenywe ngangokunokwenzeka. Kunconywa ukusebenzisa i-welding bead eqondile kanye ne-multi-layer multi-pass welding.
● Ubude besandiso sentambo yokushisela engezansi akufanele budlule u-25mm. Uma i-groove ijule kakhulu, sicela ukhethe i-conical nozzle.
● Ngemva kokuba i-carbon planer isihlanziwe, umbala wensimbi kufanele upholishwe ngaphambi kokuqhubeka nokushisela.
Sinenani elikhulu lezibonelo zezicelo zezinto ezisetshenziswayo zokushisela ezisetshenziswa embonini yamandla omoya, siyakwamukela ukubuza!
Isikhathi sokuthumela: Nov-24-2022