Q345yog ib hom hlau tsis tshua muaj hlau uas siv dav hauv cov choj, tsheb, nkoj, tsev, cov hlab siab, cov khoom siv tshwj xeeb, thiab lwm yam, qhov twg "Q" txhais tau tias lub zog tso zis, thiab 345 txhais tau tias lub zog tso zis ntawm cov hlau no yog 345MPa.
Kev sim cov hlau q345 feem ntau suav nrog ob yam: thawj, seb cov ntsiab lus ntawm cov hlau puas ncav cuag tus qauv hauv tebchaws; qhov thib ob, seb lub zog tawm los, kev sim tensile, thiab lwm yam ntawm cov hlau puas ua tau raws li cov qauv los ntawm cov koom haum tshaj lij. Nws muaj cov ntsiab lus sib txawv ntawm q235, uas yog cov hlau carbon ib txwm thiab q345 yog cov hlau sib xyaw tsawg.
Kev faib tawm ntawm cov ntaub ntawv Q345
Q345 muaj peev xwm muab faib ua Q345A, Q345B, Q345C, Q345D thiab Q345E raws li qib. Qhov lawv sawv cev yog qhov kub ntawm qhov cuam tshuam sib txawv. Q345A qib, tsis muaj kev cuam tshuam; Q345B qib, 20 degree qhov kub ib txwm cuam tshuam; Q345C qib, 0 degree cuam tshuam; Q345D qib, -20 degree cuam tshuam; Q345E qib, -40 degree cuam tshuam. Ntawm qhov kub sib txawv, cov nqi cuam tshuam kuj sib txawv.
txawv.
Kev siv cov khoom siv Q345
Q345 muaj cov khoom siv kho tshuab zoo, kev ua haujlwm kub qis, zoo plasticity thiab weldability. Nws yog siv rau hauv cov hlab ntsha nruab nrab thiab qis, cov roj tank, tsheb, cranes, cov tshuab mining, chaw tsim hluav taws xob, choj thiab lwm yam qauv, cov khoom siv kho tshuab, cov qauv tsev, thiab cov qauv dav dav uas dais cov khoom thauj dynamic. Cov khoom siv hlau, siv rau hauv cov xwm txheej kub lossis cov xwm txheej ib txwm muaj, tuaj yeem siv rau ntau yam qauv hauv thaj chaw txias hauv qab -40 ° C.