1.What yog qhov tseem ceeb rau kev ua haujlwm vuam zoo ntawm Q355B?
Cov ntsiab lus muaj roj carbon tsawg: tus qauv hauv tebchaws yuav tsum tau C muaj ntau dua lossis sib npaug nrog 0.24% (hauv cov ntsiab lus tiag tiag, cov ntsiab lus yog tswj hwm mus rau qib qis dua). Cov pa roj carbon yog lub ntsiab tseem ceeb uas ua rau muaj kev tawg txias hauv welds. Ntau ntau cov txiaj ntsig pa roj carbon cov ntsiab lus ua rau muaj kev sib tw ntawm Weld thiab kub}}}} kub cuam tshuam kom tawg rau hauv qab vuam kev ntxhov siab. Tsawg - Carbon tsim ua kom txo qis kev pheej hmoo ntawm kev tawg txias thaum tseem tiv thaiv kev ploj ntau dhau ntawm Weld Yas.
Ib qho tsim nyog tso tawm cov kev sib piv: Cov tub ntxhais ntxiv dag zog yog MN (1.00 - 1.60%). Mn tsis yog txhim kho cov hlau matrix muaj zog tab sis kuj tseem txhim kho cov tawv weld, offestting qhov kev tsis zoo ntawm qee cov khoom lag luam qis ntawm weldability. Cov ntsiab xws li Si, NB / V, thiab Ti (tag nrho tsawg dua lossis sib npaug rau 0.22%) ntxiv rau hauv cov nyiaj, feem ntau los txhim kho lub zog los ntawm kev siv zog los nag. Lawv tsis cuam tshuam ntau npaum li cas ntawm cov cua sov -} cuam tshuam thaj chaw thiab muaj tsawg kawg ntawm weldability. Kev tswj nruj ua nruj ua rau muaj kev phom sij: s tsawg dua los yog sib npaug ntawm cov txheej txheem cua txias)
2.What yog cov txheej txheem powerstram poweresle sib txuam nrog Q355B?
Los ntawm txhais tes hlau arc vuam (smws): feem ntau siv cov txheej txheem ntawm phau ntawv txheej txheem, haum rau ntawm {- Kev tiv thaiv vuam, muab cov khoom siv vuam ntxiv.
Roj av loj heev (Gmaw / FCAW): Muaj cov hlau thaiv weld ({tuab}
Submerged arc vuam (pom): siv tau zoo, nws feem ntau yog cov khoom siv tuab thiab muaj sib npaug thiab cov cuab yeej loj loj).
Lwm cov txheej txheem: kuj muaj tungsten inert roj vuam (haum rau nyias cov paib, xws li cov hluav taws xob ntau dua, ua kom hnyav dua lossis sib npaug li 50 hli tuab).
3.Txhua qhov "Preheat kub" raws li tuab?
Thickness tsawg dua los yog sib npaug rau 16mm: preheating feem ntau tsis tas yuav tsum tau thaum vuam ntawm chav tsev kub (ntau dua los yog sib npaug rau 15 degree). Yog tias qhov kub tshaj plaws yog qis dua 0℃lossis WHRD sib koom tes yog qhov pom zoo rau 80-100℃kom tiv thaiv kev tawg los ntawm kev txias heev.
Thickness 16 {{- 40 hli: Thaum qhov chaw kub siab dua 10}} hydrogen electrodes / xovtooj} - 150 qib tau pom zoo. Yog tias Weld sib koom tes yog raug rau kev ntxhov siab tseem ceeb (piv txwv, ntau-ple welding), ntau-lub preheat kub yuav nce mus rau 120-180 degree.
Thickness> 40mm: preheating yog yuav tsum tau hais txog ntawm lub qhov sov kub, feem ntau yog ntawm kev hloov kho vuam txuas ntxiv). Thaum lub sij hawm vuam, qhov kub sab nruab nrab yuav tsum raug tswj kom muaj nyob rau hauv lossis siab dua lub Preheat Kub los tiv thaiv cov cua txias ntawm cov cua sov-cuam tshuam.
4.How tswj vuam exaster cov txheej txheem?
Cov tswv yim tshav kub tswj: Zam kev ua haujlwm ntau dhau los yog ua kom sov tsis txaus. Cov kev tawm hws ntau tuaj yeem ua rau coarse nplej nyob rau hauv cov cua sov - be} cuam tshuam cheeb tsam (haz) thiab txo nruj; Kev tawm suab ntau dhau tuaj yeem ua rau kom txias sai sai, uas tuaj yeem tsim tau cov qauv nyuaj. Ib lub tswv yim tshav kub ntawm 15-35 KJ / CM2 feem ntau pom zoo (cov kev tawm tswv yim ntawm cov kev tawm tshiab yuav tsum tau hloov kho raws cov tuab; cov phiaj thicker tuaj yeem nce siab).
Vuam sequence thiab kev ntxhov siab nyem: rau cov txheej txheem nyuaj (xws li cov qauv hlau), kauj ruam {{0} rov qab vuam kev ntxhov siab. When welding multiple layers and multiple passes, the thickness of each weld should be minimal (usually<=6 mm) to avoid cumulative overheating in the HAZ. Yog tias cov khoom tivthaiv yog raug rau qhov tseem ceeb tshaj tawm {}} Weld Constrain (550-600 Degree, ua raws li kev pheej hmoo ntawm kev pheej hmoo ntawm kev tawg.
5.Qhov twg yog qhov yuav tsum tau ua rau ib puag ncig thiab kev tu?
Kev tswj ib puag ncig ib puag ncig: zam kev sab nraum zoov hauv nag, daus, lossis muaj cua hlob (cua ceev> 8m / s). Nyob rau hauv ib puag ncig huab cua (txheeb ze cov av noo> 80%), qhov chaw ua haujlwm kom tshem tawm cov dej noo (cua sov}
Ua ntej {-} Weld Kev Tu: Lub zawj ntawm ob sab thiab 20-30mm thaj chaw ntawm ob qho kev siv hluav taws xob xws li xeb, roj, thiab zeb nplai. Noog noo hauv cov xeb thiab hydrocarbons hauv cov roj tuaj yeem nce cov ntsiab lus hydrogen hauv Weld thiab nce txoj kev pheej hmoo ntawm kev tawg txias. Mill nplai kuj tseem tuaj yeem cuam tshuam Weld fusion zoo thiab ua rau tsis muaj kev tsis txaus siab tsis xws luag.