Welders thiab fabricators ua hauj lwm nrog Q500NH Corten Steel feem ntau sib cav tswv yim preheating - nws lub zog siab (yield Ntau tshaj los yog sib npaug rau 500MPa) ua rau qee qhov ceev faj txog cov kab nrib pleb txias, thaum lwm tus hla preheating kom txuag sij hawm, pheej hmoo weld tsis ua hauj lwm. Preheating yog qhov tseem ceeb rau siab- lub zog steels, tab sis nws tsis yog ib qho - loj- haum- tag nrho cov kauj ruam. Yog li, thaum twg yog qhov tsim nyog preheating rau Q500NH, thiab thaum twg nws tuaj yeem hla? Lub ntsiab lus teb yog qhov tseeb:Q500NH Corten Steel tsis xav tau preheating rau txhua qhov vuam xwm txheej- tsuas yog rau cov phaj tuab, qis- vuam kub, lossis cov pob qij txha nyuaj, vim tias qhov no ua rau muaj kev pheej hmoo ntawm cov kab mob khaub thuas.. Hauv qab no yog cov lus qhia yooj yim, ua tau zoo.
Vuam Preheating yog dab tsi (Yooj yim rau kev xyaum)
Tsis muaj cov lus piav qhia nyuaj uas xav tau: Preheating yog cua sov Q500NH thaj tsam weld mus rau qhov kub nruab nrab (ua ntej vuam) kom txo qis kev ntxhov siab, txias txias, thiab tiv thaiv cov kab mob khaub thuas. Rau siab -lub zog Corten Steel zoo li Q500NH, kev ua kom txias sai sai tom qab vuam tuaj yeem ua rau cov vuam nkig-preheating daws qhov no yooj yim thiab zoo.
3 Scenarios Qhov twg Preheating yog MANDATORY
Tsis txhob hla preheating hauv cov xwm txheej no-Q500NH lub zog siab ua rau muaj kev pheej hmoo tawg yam tsis muaj nws, txawm tias muaj kev paub txog vuam:
Phaj tuab (20mm): Cov phaj tuab dua 20mm khaws cov cua sov tsis zoo, ua rau kom txias sai. Preheat rau 80-120℃kom ntseeg tau tias txias txias thiab tsis txhob tawg.
Tsawg- Kub Vuam (＜10 degree): Cov huab cua txias ua kom cov vuam txias thiab txhawb nqa brittleness. Preheat rau 100-150℃kom offset ambient txias thiab tiv thaiv weld.
Complex/High -Stress Joints: Intricate welds (piv txwv li, T-cov pob qij txha, tuab overlaps) los yog cov pob qij txha uas hnyav loads (xws li, choj nodes) ua rau muaj kev ntxhov siab ntau dua -preheat rau 100-120℃kom tso tawm kev ntxhov siab thiab ua kom ruaj khov.
Scenario qhov twg Preheating yog tsis tsim nyog
Txuag lub sij hawm thiab cov peev txheej- hla preheating nyob rau hauv cov teeb meem no tsawg -, raws li Q500NH qhov ductility muaj txaus:
Nyias mus rau nruab nrab daim hlau (tsawg dua los yog sib npaug li 20mm): Cov phaj hauv qhov no khaws cov cua sov kom zoo thaum lub sij hawm vuam, tsis tas yuav tsum tau ntxiv preheating (thaum ambient kub siab dua lossis sib npaug li 10 degree).
Yooj yim Weld Joints: Lub pob tw los yog fillet welds (piv txwv li, lub teeb guardrails, hniav thav duab) uas tsis muaj siab - kev nyuaj siab.
Qhov kub thiab txias (10-25 degree): Cov kub me me kom ua kom qeeb, ua kom txias txias, tshem tawm qhov xav tau preheating.
Tswv yim Preheating tswv yim (yog tias xav tau)
Yog tias koj qhov project xav tau preheating rau Q500NH, ua raws li cov txheej txheem yooj yim no kom tsis txhob ua yuam kev:
Kev Tswj Kub Kub: Siv lub ntsuas kub kom ntseeg tau qhov tseeb- tsis txhob overheating (＞150 degree), uas ua rau Q500NH lub zog siab tsis muaj zog.
Cua sov Range: Preheat thaj tsam 50-100mm nyob ib ncig ntawm qhov sib koom ua ke (tsis yog lub vuam nws tus kheej) rau kev faib cov cua sov.
Txias: Tom qab vuam, cia qhov sib koom ua ke txias txias (tsis txhob yuam kom txias) kom tswj tau qhov sib zog thiab lub zog.
Common Preheating yuam kev kom zam
Ib qho yuam kev ntau dhau -preheating Q500NH (siab dua 150 degree) los yog preheating nyias daim hlau tsis tas li- qhov no nkim sij hawm, nce nqi, thiab tuaj yeem cuam tshuam cov hlau cov khoom siv kho tshuab. Hloov pauv,
