Txhua qhov kev ua tau zoo ntawm SMA400BP Corten Steel-los ntawm nws qhov ntev -ntev atmospheric corrosion tsis kam mus rau nws txhim khu kev qha weldability thiab formability-tig ncaj qha rau nws nruj nruj tswj cov tshuaj muaj pes tsawg leeg, raws li nruj me ntsis txhais los ntawm Nyiv JIS G 3114: 2022 tus qauv rau kub {{6}corrosion resistant{6}} rolled. Tsis zoo li generic structural steels nrog xoob, sib txawv alloy txwv, txhua lub hauv paus hauv SMA400BP yog txhob txwm sib npaug kom xa cov kev ua tau zoo sib xws, kev kwv yees ua tau zoo rau cov qauv welded sab nraum zoov, tsis muaj cov khoom siv ntxiv uas ua rau cov nqi nce lossis kev cuam tshuam zoo.
Core Functional Alloy Elements (JIS G 3114: 2022 Mandated Ranges)
Txhua alloy hauv SMA400BP ua haujlwm tshwj xeeb, tsis yog- lub hom phiaj sib tham, nrog rau ntau qhov ntsuas kom sib npaug ntawm kev ua tau zoo thiab kev ua tau zoo:
Carbon (C): Tsawg dua lossis sib npaug rau 0.18%Lub hauv paus pob zeb ntawm SMA400BP qhov zoo tshaj plaws weldability, cov pa roj carbon tsawg no tiv thaiv kev ua kom tawv nqaij thiab txias tawg hauv qhov vuam cua sov- thaj tsam cuam tshuam (HAZ), tshem tawm qhov xav tau preheating rau feem ntau cov qauv thicknesses. Nws kuj tseem khaws cov hlau ductility rau qhov txias txias, tsis muaj kev txi nws lub zog ntawm lub zog.
Tooj liab (Cu): 0.30-0.50%Ib qho ntawm ob qho tseem ceeb corrosion- tawm tsam cov ntsiab lus, tooj liab reacts nrog atmospheric oxygen thiab noo noo los ua ib tug ntom, nws tus kheej- kho tiv thaiv patina. Cov txheej txheem txuas ntxiv no thaiv kev nkag mus ntxiv, xa 5-10x zoo dua corrosion dua li cov pa roj carbon zoo tib yam hauv cov cheeb tsam me me.
Chromium (Cr): 0.45-0.75%Ua haujlwm hauv kev sib koom ua ke nrog tooj liab, chromium ntxiv dag zog rau patina qhov ntom thiab adhesion, kom ntseeg tau tias nws tsis flake lossis degrade thaum lub sijhawm. Qhov no JIS- tshwj xeeb ntau yam xauv rau hauv kev tiv thaiv corrosion zoo ib yam, thaum zam qhov brittleness uas los nrog cov ntsiab lus chromium ntau dhau.
Manganese (Mn): Tsawg dua lossis sib npaug li 1.25%Sib npaug cov hlau lub zog tensile thiab cuam tshuam toughness, thaum txhawb nqa weldability du. Nws ua haujlwm nrog cov pa roj carbon monoxide kom tau raws li SMA400BP cov qauv kev ua tau zoo, tsis muaj kev cuam tshuam nws cov formability lossis corrosion kuj.
Kev Tswj nruj nruj txwv tsis pub dhau (JIS G 3114: 2022)
JIS G 3114: 2022 teeb tsa cov kev txwv nruj rau cov khoom seem thiab impurities, txhawm rau tshem tawm cov kev ua tau zoo thiab cov khoom tsis xws luag:
Phosphorus (P): Tsawg dua lossis sib npaug rau 0.035% & Sulfur (S): Tsawg dua lossis sib npaug rau 0.035%Cov kev txwv nruj no tiv thaiv kub tawg thaum vuam, pitting corrosion nyob rau sab nraum zoov, thiab nkig tawg nyob rau hauv qis kub. Kev tswj tsis tau qib ntawm cov impurities no yuav tsim cov ntsiab lus tsis ua hauj lwm ntxov, txawm tias muaj qhov dej - tsim patina.
Nickel (Ni): Tsawg dua lossis sib npaug rau 0.03%Lub ntsiab lus tseem ceeb ntawm SMA400BP, qhov ze ntawm - xoom nickel cov ntsiab lus khaws cov khoom siv tus nqi siv tau, thaum nws cov tooj liab -chromium sib xyaw ua kom muaj kev tiv thaiv corrosion txaus rau nws cov phiaj xwm me me -ib puag ncig daim ntawv thov. Qhov no ua rau nws sib nrug los ntawm qib siab dua -alloy SMA400 series qib tsim los rau cov mob hnyav dua.
Tswv yim tus nqi ntawm qhov sib npaug sib npaug
Qhov no JIS- txhais cov tshuaj pleev ib ce muab peb qhov txiaj ntsig zoo rau cov pab pawg ua haujlwm:
Batch-rau-batch sib xws: Cov kev txwv nruj nruj kom ntseeg tau tias txhua qhov kev xa khoom ntawm SMA400BP ua tau zoo ib yam, tshem tawm cov khoom tsim tawm lossis teeb meem kev ua haujlwm.
Factory-kev ua phooj ywg zoo: Qhov qis- carbon, qis- impurity tsim ua haujlwm nrog cov qauv vuam thiab cov khoom siv txias txias, tsis muaj cov txheej txheem tshwj xeeb yuav tsum tau ua.
Kev kwv yees ntev - ua haujlwm tau ntev: Cov tooj liab -chromium alloy system muab qhov ruaj khov, tsis tshua muaj corrosion, ua rau lub neej kev pabcuam thiab kev saib xyuas yooj yim los npaj rau ntau tshaj 25+ xyoo.
Hauv luv luv, txhua yam hauv SMA400BP Corten Steel tau teev tseg los ntawm JIS G 3114: 2022 nrog lub hom phiaj meej, siv tau. Qhov sib npaug, nruj tswj cov tshuaj muaj pes tsawg leeg yog lub hauv paus ntawm qib kev txhim khu kev qha weldability, zoo ib yam corrosion kuj, thiab tus nqi -kev ua tau zoo rau lub teeb- rau- nruab nrab load sab nraum welded lug.
