Kev xaiv cov khoom siv rau qis- qhov kub thiab txias sab nraum zoov feem ntau ua rau qhov tsis paub tseeb- qhov kub thiab txias tuaj yeem ua rau cov hlau nkig, ua rau tawg, kev ua haujlwm tsis zoo, thiab kev hloov pauv kim. Ntau tus neeg yuav khoom tig mus rau Q355GNH Corten Steel, paub tias nws yog qib siab - huab cua ua haujlwm - qib tiv taus, tab sis xav paub tias nws tuaj yeem sawv ntsug ntev ntev. Tsis zoo li cov qauv Corten steels, Q355GNH yog tsim los rau cov mob hnyav, tab sis nws qhov kev tsim nyog tseem nyob ntawm qhov kub thiab txias. Yog li, Q355GNH puas haum rau qhov qis- qhov kub thiab txias, thiab muaj kev txwv lossis kev ceev faj dab tsi? Raws li GB/T 4171 tus qauv, qis- cov ntaub ntawv ntsuas kub, thiab cov ntawv thov tiag tiag hauv ntiaj teb, cov lus teb tseem ceeb yog qhov tseeb:Q355GNH Corten Steel tshwj xeeb yog tsim los rau qis- siv qhov kub thiab txias, haum rau feem ntau thaj chaw txias (-40℃txog 0 degree), nrog kev txhim khu kev qha thaum sib tw rau qhov kub thiab txias.. Hauv qab no yog cov lus qhia yooj yim, ua tau zoo.
Qhov zoo tshaj plaws: Q355GNH qis-Tsub Toughness
Yog vim li cas Q355GNH ua tau zoo nyob rau hauv qhov chaw txias yog nws qhov kev txhim kho qis -kub toughness- yog ib qho tseem ceeb ntawm cov cuab yeej uas tiv thaiv kev tawg tawg, teeb nws sib nrug ntawm cov qib Corten:
Standard Toughness Requirements (GB/T 4171):
Qib Base: Ntau dua lossis sib npaug rau 34J Charpy V-qhov cuam tshuam lub zog ntawm -20℃(tsim rau feem ntau thaj chaw txias).
Kev xaiv siab -qib: Ntau dua lossis sib npaug rau 27J ntawm -40℃(rau cov xwm txheej txias txias, piv txwv li, Arctic lossis sab qaum teb Siberia).
Kev them nyiaj yug Alloy: Cov kab txuas ntxiv ntawm Ni thiab Mn txhim kho ductility, ua kom cov hlau tuav tau yooj yim txawm tias nyob rau hauv qhov txias txias ntev - tsis zoo li cov pa roj carbon zoo tib yam, uas ua rau qis dua 0℃.
Tswv yim Distinction: Ua tau zoo tshaj tus qauv Q355NH (uas tsuas yog ua tau raws li 0℃toughness yuav tsum tau) nyob rau hauv ib puag ncig txias, txo qhov kev pheej hmoo ntawm pob txha.
Kev tsim nyog los ntawm qis-Tsuas Kub (Tswj rau Cov Haujlwm)
Q355GNH qhov kev ua tau zoo sib txawv los ntawm qhov ntsuas kub tsawg kawg nkaus - ntawm no yog yuav ua li cas kom phim nws rau koj qhov project qhov chaw:
1. Tsim nyog: -20℃rau 0℃(Feem ntau Cov Chaw Txias)
Cov xwm txheej: Northern Europe, Central North America, thiab cov cheeb tsam txias txias uas lub caij ntuj no kub poob mus rau -20℃tab sis tsis tshua muaj qis dua.
Siv Cov Ntaub Ntawv: Txhua daim ntawv thov sab nraum zoov- kev txhawb nqa choj, warehouse thav duab, guardrails, hniav cladding, thiab nruab nrab- thauj cov khoom siv.
Nco tseg: Xaiv tus qauv Q355GNH qib thiab txheeb xyuas qhov nyuaj ntawm Mill Test Certificate (MTC).
2. Conditionally haum: -40℃rau -20℃(Hmo txias)
Cov xwm txheej: thaj chaw Arctic, sab qaum teb Canada, lossis Siberia (lub caij txias txias).
Requirements: Order the Q355GNH -40℃ grade (verify impact energy ≥27J at -40℃ via MTC); avoid ultra-thick plates (>50mm) uas yuav poob toughness.
Siv Cov Khoom Siv: Cov khoom siv tseem ceeb (piv txwv li, choj lub ntsiab kab teeb, cov thav duab muaj) thiab cov khoom siv sab nraum zoov txhawb nqa.
3. Tsis haum: Hauv qab -40℃(Ntev Ultra-Cold)
Kev pheej hmoo: Txawm tias qib -40℃poob txaus toughness hauv qab -40 degree, ua rau brittle fracture txaus ntshai nyob rau hauv load.
Kev pom zoo: Xaiv tshwj xeeb ultra- qis- cov hlau kub (xws li Q460GNH) es tsis txhob rau cov xwm txheej no.
Tswv yim ceev faj rau qis-Kev siv kub
Cov kauj ruam yooj yim no ua kom Q355GNH ua tau zoo hauv qhov chaw txias:
Txheeb xyuas qib: Ib txwm thov MTC kom paub meej tias qhov cuam tshuam lub zog ntawm koj qhov project qhov kub thiab txias (-20℃lossis -40 degree).
Welding care: Preheat thick plates (>16mm) rau 80-120℃ua ntej vuam; siv cov khoom siv hluav taws xob tsawg kom tsis txhob muaj cov kab mob khaub thuas.
Fabrication: Siv lub vojvoog dabtsi yog khoov ntau dua lossis sib npaug li 4 × phaj thickness (vs . 3 × ntawm qhov kub thiab txias) kom txo qis kev ntxhov siab.
Hauv cov ntsiab lus, Q355GNH Corten Steel yog qhov kev xaiv saum toj kawg nkaus rau qis - qhov kub thiab txias ib puag ncig, haum rau -40℃txog 0℃nrog kev xaiv qib zoo. Nws txhim kho qis- qhov kub thiab txias, ua ke nrog kev txhim khu kev tiv thaiv corrosion, ua rau nws zoo tagnrho rau kev txias - thaj tsam sab nraum zoov thiab cov haujlwm ua haujlwm-tsuas yog phim cov qib rau qhov kub thiab txias thiab ua raws li kev ceev faj yooj yim.
