q345 uayog ib yam ntawm cov hlau tsis tshua muaj hlau uas tau siv dav hauv cov choj, tsheb, nkoj, cov tsev, cov hlab ntsha siab, cov khoom siv tshwj xeeb, thiab lwm yam, qhov "Q" txhais tau tias muaj zog tawm los, thiab 345 txhais tau tias lub zog ntawm cov hlau no yog 345MPa.
Kev ntsuam xyuas ntawm q345 steel feem ntau suav nrog ob yam: ua ntej, seb cov ntsiab lus ntawm cov hlau mus txog lub teb chaws tus qauv; thib ob, seb lub zog tawm los, kev sim tensile, thiab lwm yam ntawm cov hlau ua tau raws li cov qauv los ntawm cov chaw tshaj lij. Nws muaj cov ntsiab lus sib txawv ntawm q235, uas yog cov pa roj carbon zoo tib yam thiab q345 yog cov hlau tsis tshua muaj hlau.
Kev faib tawm ntawm cov khoom siv Q345
Q345 tuaj yeem muab faib ua Q345A, Q345B, Q345C, Q345D thiab Q345E raws li qib. Qhov lawv sawv cev yog qhov tshwj xeeb tshaj yog tias qhov kub ntawm qhov cuam tshuam sib txawv. Q345A qib, tsis muaj kev cuam tshuam; Q345B qib, 20 degree ib txwm kub cuam tshuam; Q345C qib, 0 degree cuam tshuam; Q345D qib, -20 degree cuam tshuam; Q345E theem, -40 degree cuam tshuam. Ntawm qhov sib txawv qhov kub thiab txias, qhov cuam tshuam qhov tseem ceeb kuj txawv.
txawv.
Kev siv cov khoom siv Q345
Q345 muaj cov khoom siv kho tshuab zoo, ua tau zoo ntawm qhov kub thiab txias, zoo plasticity thiab weldability. Nws yog siv los ua cov hlab ntsha nruab nrab thiab tsis tshua muaj siab, cov roj tso tsheb hlau luam, tsheb, cranes, mining machinery, fais fab chaw nres tsheb, txuas hniav thiab lwm yam qauv, cov khoom siv kho tshuab, cov khoom siv hauv tsev, thiab cov qauv dav dav uas muaj cov khoom hnyav. Cov khoom siv hlau, siv rau hauv qhov kub-dov los yog ua haujlwm zoo, tuaj yeem siv rau ntau yam qauv hauv qhov chaw txias hauv qab -40 ° C.