Q235 steel phaj thiab Q345 steel phaj feem ntau tsis pom los ntawm sab nraud. Cov xim sib txawv tsis cuam tshuam rau cov khoom siv ntawm cov hlau, tab sis yog tshwm sim los ntawm cov txheej txheem txias sib txawv tom qab cov hlau tau dov tawm. Feem ntau, qhov saum npoo yog xim liab tom qab ntuj txias. Yog tias siv cov ntaub ntawv txias sai yog siv, cov ntaub ntawv oxide ntom ntom rau saum npoo av, uas yuav tshwm xim dub.
Rau kev tsim lub zog dav dav, Q345 yog siv vim nws muaj zog dua li Q235 steel, txuag steel los ntawm 15% - 20% piv rau Q235. Rau kev ruaj ntseg tswj tsim, Q235 zoo dua. Tus nqi sib txawv yog 3% - 8%.
Hais txog kev txheeb xyuas, muaj ob peb nqe lus:
A.
- Nyob rau hauv lub Hoobkas, welding txoj kev yuav siv tau los sib txawv ntawm ob cov ntaub ntawv. Piv txwv li, ib lub me me puag ncig steel yog welded rau ntawm ob daim hlau phaj siv E43 vuam pas nrig, thiab ces shear force yog siv. Ob hom steel phaj cov ntaub ntawv tuaj yeem paub qhov txawv raws li qhov kev puas tsuaj.
- Lub Hoobkas tseem tuaj yeem siv lub log sib tsoo kom paub qhov txawv ntawm ob yam khoom. Thaum sib tsoo Q235 steel nrog lub log sib tsoo, lub txim taws yog puag ncig thiab xim tsaus. Thaum rau Q345 steel, lub txim taws yog bifurcated thiab ci xim.
- Raws li cov xim sib txawv ntawm qhov sib txawv ntawm ob lub steels, ob hom hlau kuj tuaj yeem txawv. Feem ntau, shear ntug ntawm Q345 yog xim dawb.
B.
- Raws li cov xim ntawm cov hlau phaj, Q235 thiab Q345 cov ntaub ntawv tuaj yeem paub qhov txawv: xim ntawm Q235 yog ntsuab, thiab Q345 yog xim liab me ntsis (qhov no tsuas yog rau cov hlau tsuas yog nkag mus rau hauv lub tshav pob thiab tsis tuaj yeem sib txawv raws sijhawm).
- Cov khoom siv sib txawv tshaj plaws yog kev tshuaj xyuas tshuaj. Cov ntsiab lus carbon ntawm Q235 thiab Q345 txawv, thiab cov ntsiab lus tshuaj kuj txawv. (Qhov no yog ib txoj kev ruam ruam).
- Yuav kom paub qhov txawv ntawm Q235 thiab Q345 cov ntaub ntawv siv vuam: taub qab ob daim hlau ntawm cov khoom tsis paub thiab vuam nrog ib qho vuam zoo tib yam. Yog tias muaj qhov tawg ntawm ib sab ntawm cov hlau phaj, nws tau ua pov thawj tias yog cov khoom siv Q345. (Qhov no yog kev xyaum ua).
Xov Xwm Kub
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