Isixhobo somzimba webhakethi we-wY25 excavator yi-Q345, enokuqina kakuhle kwe-weldability. Isixhobo sezinyo lebhakethi yi-ZGMn13 (intsimbi ephezulu ye-manganese), enesigaba esinye se-austenite kwiqondo lokushisa eliphezulu kwaye inobunzima obuhle kunye nokumelana nokunxiba okuphezulu phantsi komthwalo wempembelelo ngenxa yomsebenzi wokuqina komgangatho womhlaba. Kodwa le weldability yentsimbi ihlwempuzekile: enye ikwindawo ye-welding echatshazelwe bubushushu bemvula ye-carbide ebangelwa yi-embrittlement yezinto; okwesibini kukuqhekeka kwe-weld thermal, ngakumbi kwindawo ekufutshane ne-seam liquefaction crack.
I-1.i-carbide ye-heat-affected zone precipitation ebangelwa yi-embrittlement
I-ZGMn13 intsimbi ephezulu yemanganese inokugalela i-carbide ecaleni komda weenkozo xa ifudunyezwa kwakhona ngaphezulu kwe-250 ℃, ukuze ukuqina kwemathiriyeli kucuthwe kakhulu kunye nokusebenza okugqwesileyo kwentsimbi ephezulu yemanganese yonakaliswe kakhulu. Emva kokuhlalutya, xa intsimbi ephezulu ye-manganese ifudunyezwa kwakhona kwaye isantya sokupholisa sikhawuleza, i-carbide iya kuqala iqhube kumda wengqolowa, kwaye kunye nokwandiswa kwexesha lokuhlala, i-carbide kumda wengqolowa iya kutshintsha ukusuka kwi-particle engapheliyo ukuya kwi-mesh. ukuhanjiswa, kunye nokonakala kwayo kuya kwanda kakhulu. Ngoko ke, xa intsimbi ye-manganese ephezulu kwi-welding okanye ekufudumezweni kwakhona emva kwe-welding, iya kuba kwindawo ye-welding ye-welding ye-heat-charged zone ye-precipitation ye-carbide ukuya kumaqondo ahlukeneyo, kwaye inokuba yinguqu ye-martensitic, kungekhona nje ukwenza izinto eziphathekayo, kodwa kwakhona. ukunciphisa ukuxhathisa ukunxiba kunye nokuqina kwempembelelo. Kwaye, kwindawo echatshazelwe bubushushu kulula ukulinyusa izinga lobushushu be-carbide (650 ℃ okanye njalo) okukhona ixesha lokuhlala lide, kokukhona kukho imvula ye-carbide.
Ukuze kuncitshiswe imvula ye-carbide kunye nokuthintela izinto ekulahlekeni kobunzima kwaye zibe brittle, amanyathelo kufuneka athathwe ukukhawuleza izinga lokupholisa, oko kukuthi, ukunciphisa ixesha lokuhlala kumaqondo aphezulu. Ngesi sizathu, umzimba webhakethi ye-excavator kunye namazinyo eebhakethi ukuwelda ukusebenzisa icandelo elincinci le-welding, i-welding intermittent, i-welding yamanzi, njl.
2.Welding ukuqhekeka thermal
Ukuthintela ukuqhekeka kwe-thermal kukunciphisa umxholo we-S kunye ne-P kwisiseko sesinyithi okanye i-weld material; inokuphinda ithathe amanyathelo okunciphisa uxinzelelo lwe-welding kwinkqubo ye-welding, njengokusetyenziswa kwe-welding yecandelo elifutshane, i-welding intermittent, i-dispersion welding kunye ne-hammering emva kwe-welding. Kwi-bucket body overlay welding high manganese steel, ungaqala udibanise umaleko we-Cr-ni, i-Cr-ni-Mn okanye i-Cr-Mn ye-austenitic yentsimbi ye-welding welding channel, inokuthintela ukuqhekeka.
Umzimba webhakethi ye-excavator kunye nenkqubo yokuwelda amazinyo eemele
1.Ukulungiselela phambi kwe-welding
Okokuqala, susa amazinyo ebhakethi egugileyo kumzimba we-emele, uze usebenzise i-angle grinder ukupolisha ukufakwa kwamazinyo eemele, akukho daka, umhlwa, kwaye ukhangele ngenyameko ukuba kukho iintanda kunye nezinye iziphene; vula i-bevel nge-carbon arc gas planer kumazinyo e-emele ukuba adityaniswe, kwaye ucoce nge-angle grinder.
2.Welding
① Okokuqala kumzimba we-emele (kunye namalungu e-emele yezinyo) kunye ne-GBE309-15 i-electrode ye-welding yokugqithisa i-welding, i-electrodes ye-welding kufuneka ibe yi-350 ℃, i-15h yomiswe phambi kwe-welding, i-welding yangoku kufuneka ibenkulu, isantya se-welding sicotha kancinane ukuqinisekisa ukuba umxholo we-nickel wokudibanisa we-5% ukuya kwi-6%, ukuthintela ukuveliswa kwe-crack-sensitive martensite.
② Ukuqhuba i-welding yendawo. Emva kokuba amazinyo ebhakethi ahlanganiswe endaweni, intonga ye-welding ye-D266 ene-diameter ye-32MM isetyenziselwa i-symmetrical positioning welding kumacala omabini, ubude be-weld abudluli kwi-30MM. ukupholisa amanzi kunye nokunyundela ngokukhawuleza emva kwe-welding.
③Ukuwelda ezantsi. Sebenzisa intonga ye-32MM yedayamitha ye-D266 yokuwelda i-bottom welding. Sebenzisa i-low current, i-DC reverse polarity, i-welding intermittent.
Ixesha lokuposa: Aug-04-2022