Yuav ua li cas cov tshuaj sib xyaw ua ke ntawm Q345 hlau cuam tshuam nws cov khoom?
Raws li qhov qis -} alloy, siab {1} {, kev ua haujlwm zoo, thiab kab mob alloy (v, nb, ti). Cov teeb meem tsis zoo xws li phosphorus (p) thiab sulfur (s) yuav tsum tseem yuav tsum tau tswj hwm nruj.
Cov tshuaj lom neeg muaj kuab lom ntawm Q345 steel yog tsim nyob ib puag ncig peb qhov tseem ceeb ntawm "siab lub zog + siab + weldability zoo weldability." Qhov pib qhov kev ceeb toom tuaj yeem yog sau ua ke raws li hauv qab no:
Qes c (tsawg dua los yog sib npaug rau 0.20%) ua kom muaj zog ua kom muaj zog thaum tsis tshua muaj zog thiab Weldability degradation;
MN (1.00-1.60%) Ua ib qho ntxiv dag zog, thaum ua tiav kev txhim kho toughness thiab kev ua kom tiav ntawm lub zog thiab tawv;
Microalloying (v / nb / ti / ti) rov qab ua kom zoo dua cov qoob loo loj, ua kom muaj zog ntxiv thiab kev ua kom nruj thaum muaj txiaj ntsig;
Tsawg p / s (tsawg dua los yog sib npaug rau 0.035%) tshem tawm kev pheej hmoo ntawm kev pheej hmoo ntawm txias thiab kub britleness, kom muaj kev nyab xeeb rau kev nyab xeeb.
Nws yog precisely no meej cov sib xyaw sib xyaw uas ua rau cov vaj tse xws li cov tuam tsev siab xws li muaj qhov kub thiab txias thiab muaj zog. Nws tseem muaj cov txheej txheem weldability thiab cov txheej txheem zoo, ua rau nws muaj cov qhab nia siv tsawg tshaj plaws ntawm qis- altero txheej txheem hlau.