Welders thiab fabricators feem ntau cuam tshuam nrog seb Q460NH Corten Steel xav tau preheating ua ntej vuam - nws lub zog siab (yield ntau dua lossis sib npaug rau 460MPa) ua rau qee qhov kev txhawj xeeb txog cov kab mob khaub thuas, thaum lwm tus hla preheating tag nrho kom txuag tau sijhawm, pheej hmoo weld tsis ua haujlwm. Preheating yog qhov tseem ceeb rau siab -lub zog steels, tab sis nws tsis yog ib qho - loj- haum- txhua qhov yuav tsum tau ua. Yog li, thaum twg yog qhov tsim nyog preheating rau Q460NH, thiab thaum twg nws tuaj yeem hla? Lub ntsiab lus teb yog qhov tseeb:Q460NH Corten Steel tsis tas yuav tsum tau preheating rau txhua qhov vuam xwm txheej- tsuas yog rau cov phaj tuab, qis- vuam kub, lossis cov pob qij txha nyuaj, vim 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)
Koj tsis xav tau cov lus piav qhia nyuaj kom nkag siab txog nws lub hom phiaj: Preheating yog cua sov Q460NH qhov chaw vuam mus rau qhov kub nruab nrab (ua ntej vuam) kom txo qis hauv kev ntxhov siab, txias txias, thiab tiv thaiv cov kab mob khaub thuas. Rau siab -lub zog steels zoo li Q460NH, kev txias sai sai tom qab vuam tuaj yeem ua rau cov vuam nkig-preheating daws qhov no yooj yim thiab zoo.
Thaum Preheating yog MANDATORY (3 Qhov Tseem Ceeb Scenario)
Tsis txhob hla preheating nyob rau hauv cov xwm txheej no-Q460NH lub zog siab ua rau muaj kev pheej hmoo tawg yam tsis muaj nws:
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 ua kom brittleness. Preheat rau 100-150℃kom offset lub 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 mus rau 100-120℃kom tso tawm kev ntxhov siab thiab ua kom cov kav ntev.
Thaum Preheating yog qhov tsis tseem ceeb (Feem ntau Scenarios)
Txuag lub sijhawm thiab cov peev txheej- hla preheating nyob rau hauv cov teeb meem qis no -, raws li Q460NH cov khoom siv hluav taws xob zoo 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 (ambient kub siab dua los yog sib npaug rau 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.
Vuam nyob rau hauv Ambient Kub (10-25 degree): Qhov kub ib txwm 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 Q460NH, ua raws li cov txheej txheem yooj yim no:
Kev Tswj Kub Kub: Siv lub ntsuas kub kom ntseeg tau qhov tseeb- tsis txhob overheating (＞150 degree), uas ua rau Q460NH 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 preheating thiab welding, cia cov sib koom ua ke txias lawm (tsis txhob yuam kom txias) kom tswj tau cov vuam toughness.
Common yuam kev kom zam
Ib qho yuam kev ntau dhau lawm -preheating Q460NH (siab dua 150 degree) los yog preheating nyias daim hlau yam tsis tsim nyog- qhov no nkim sij hawm, nce nqi, thiab tuaj yeem cuam tshuam cov hlau cov khoom siv tshuab. Conversely, hla preheating rau tuab daim hlau los yog txias welding txaus ntshai nqi weld tawg.
Hauv luv luv, Q460NH Corten Steel tsuas yog xav tau preheating rau cov phaj tuab, qis - vuam kub, lossis cov pob qij txha nyuaj. Los ntawm kev sib piv preheating rau koj qhov xwm txheej vuam, koj ua kom muaj zog, ruaj khov welds thaum leveraging Q460NH lub zog siab thiab corrosion kuj.
