Impahla yebhakede ye-excavator ye-wY25 yi-Q345, inokushisela okuhle. Izinyo lebhakede yi-ZGMn13 (insimbi ephezulu ye-manganese), eyi-austenite yesigaba esisodwa emazingeni okushisa aphezulu futhi inokuqina okuhle nokumelana nokugqoka okuphezulu ngaphansi komthwalo womthelela ngenxa yokuqina komsebenzi kongqimba olungaphezulu. Kodwa lokhu kushisela kwensimbi akulungile: enye isendaweni yokushisela ethinteke ukushisa imvula ye-carbide ebangelwa ukukhishwa kwezinto ezibonakalayo; okwesibili ukuqhekeka okushisayo kwe-weld, ikakhulukazi ku-seam zone liquefaction crack.
1.i-zone precipitation carbide ethinteke ukushisa okubangelwa i-embrittlement
Insimbi ye-ZGMn13 ye-manganese ephezulu ingase ibangele i-carbide eduze komngcele wokusanhlamvu lapho ishisisa futhi ngaphezu kuka-250 ℃, ukuze ukuqina kwento kunciphe kakhulu kanye nokusebenza okuhle kakhulu kwensimbi ephezulu ye-manganese kulimale kabi. Ngemva kokuhlaziya, lapho insimbi ephezulu ye-manganese ishiselwa futhi futhi isivinini sokupholisa sishesha, i-carbide izoqala ukushona emngceleni wokusanhlamvu, futhi ngokwelulwa kwesikhathi sokuhlala, i-carbide emngceleni wokusanhlamvu izoshintsha isuke esimweni sezinhlayiyana ezingaqhubeki ibe inenetha. ukusatshalaliswa, futhi ukuqina kwayo kuzokwanda kakhulu. Ngakho-ke, lapho insimbi ephezulu ye-manganese ekushiseni noma ekushiseni kabusha ngemuva kokushisela, izoba sendaweni ethinteke ukushisa ye-welding yesigaba semvula ye-carbide ngamadigri ahlukahlukene, futhi ingase ibe nokuguqulwa kwe-martensitic, hhayi nje ukwenza izinto zibe brittle, kodwa futhi. nciphisa ukumelana nokugqoka kanye nokuqina komthelela. Futhi, endaweni ethinteke ukushisa kulula ukuletha izinga lokushisa le-carbide (650 ℃ noma ngaphezulu) uma isikhathi sokuhlala siside, imvula ye-carbide iyanda.
Ukuze kuncishiswe imvula ye-carbide futhi kuvimbele ukuthi impahla ingalahlekelwa ukuqina futhi ibe brittle, kufanele kuthathwe izinyathelo zokusheshisa izinga lokupholisa, okungukuthi, ukunciphisa isikhathi sokuhlala emazingeni okushisa aphezulu. Ngenxa yalesi sizathu, umzimba webhakede le-excavator kanye namazinyo ebhakede lokushisela ukusebenzisa i-welding yesigaba esifushane, i-welding ngezikhathi ezithile, i-welding yamanzi yokucwiliswa, njll.
2.Welding ukuqhekeka okushisayo
Ukuvimbela ukuqhekeka okushisayo ukunciphisa okuqukethwe kwe-S no-P kusisekelo sensimbi noma impahla yokushisela; futhi ingathatha izinyathelo zokunciphisa ukucindezeleka kwe-welding kusukela kunqubo yokushisela, njengokusebenzisa i-welding yesigaba esifushane, i-welding ngezikhathi ezithile, i-dispersion welding kanye ne-hammering ngemva kokushisela. Embonweni womzimba webhakede oshisela insimbi ephezulu ye-manganese, ungakwazi kuqala ukushisela ungqimba lwensimbi ye-Cr-ni, i-Cr-ni-Mn noma i-Cr-Mn austenitic ye-austenitic yesiteshi sokushisela okukodwa, kungavimbela ukuqhekeka.
Umzimba webhakede le-Excavator kanye nenqubo yokushisela amazinyo ebhakede
1.Ukulungiselela ngaphambi kokushisela
Okokuqala, susa amazinyo ebhakede agugile emzimbeni webhakede, bese usebenzisa i-angle grinder ukuze upholise ukufakwa kwamazinyo ebhakede ahlanzekile, alukho udaka, ukugqwala, futhi uhlole ngokucophelela ukuthi kukhona yini imifantu nezinye iziphambeko; vula i-bevel nge-carbon arc gas planer emazinyweni ebhakede ukuze ashiselwe, futhi uhlanze nge-engeli grinder.
2.Ukushisela
① okokuqala emzimbeni webhakede (kanye namalunga ezinyo lebhakede) ane-GBE309-15 ama-electrode wokushisela wokushisela imbondela, ama-electrode wokushisela adinga u-350 ℃, ukoma okungu-15h ngaphambi kokushisela, umthamo wokushisela kufanele ube mkhulu, ijubane lokushisela lihamba kancane ukuze uqinisekise ukuthi okuqukethwe kwe-nickel ye-fusion zone ka-5% kuya ku-6%, ukuvimbela ukukhiqizwa kwe-crack-sensitive martensite.
② Yenza ukushisela indawo. Ngemva kokuba amazinyo ebhakede ehlanganiswe endaweni, induku yokushisela i-D266 enobubanzi obungu-32MM isetshenziselwa ukushisela okulinganayo kwezinhlangothi zombili, ubude be-weld abudluli ku-30MM. ukupholisa amanzi kanye nokusando ngokushesha ngemva kokushisela.
③Ukushisela okuphansi. Sebenzisa induku yokushisela engu-32MM ububanzi be-D266 ukushisela i-bottom. Sebenzisa yamanje ephansi, i-DC reverse polarity, i-welding ephakathi.
Isikhathi sokuthumela: Aug-04-2022