### 1. Dab tsi yog 350 MPA qib qib?
IB 350 MPA qib steel yog hom qauv hlau uas nws muaj lub zog 350 yam tsawg kawg nkaus yog 350 MegapScals (MPA) **. Tos lub zog yog qhov kev ntxhov siab uas cov hlau pib deform mus tas li thiab yuav tsis rov qab mus rau nws cov qauv qub. Qhov no txhais tau tias cov hlau no tuaj yeem tiv taus lub zog ntawm 350 lab Newtons ib square meter ua ntej nws pib khoov mus tas li. Cov qib nyiam zoo li no yog feem ntau siv hauv kev tsim kho, cov nkoj, thiab lwm yam kev thov ua kom muaj zog, weldability, thiab tus nqi yuav tsum tau ua. Hauv ntau cov qauv thoob ntiaj teb, koj yuav pom tias nws tau xaiv raws li S355 (European), US72 Qib 50 (peb}}, kwv yees li 345 mpa), lossis zoo sib xws.
### 2. Dab tsi yog 35 MPA sawv rau?
Tus "355 MPa" tshwj xeeb yog hais txog tus ** Tsawg kawg cov txiaj ntsig muaj zog ** ntawm cov hlau. Nws yog cov cuab yeej tseem ceeb uas txhais tau qib. Thaum cov hlau tau sau npe tias yog "355 MPa," nws yog lav tias cov khoom tau raug sim thiab yuav plastically deform ntawm theem kev ntxhov siab ntawm tsawg kawg 355 megapascals. Tus lej no yog qhov tseem ceeb rau cov kws ua choj thiab cov neeg tsim qauv thaum suav tias nws muaj zog txaus los txhawb kev cia siab yam tsis muaj kev cuam tshuam nrog kev sib raug zoo.
### 3. Dab tsi yog qhov txawv ntawm 250 thiab 350 qib steel hlau?
Qhov sib txawv thawj ntawm 250 thiab 350 qib steel yog lawv ** lub zog **.
* ** Lub zog: ** Tus qauv qib 350 yog muaj zog dua li 250 qib steel. Nws muaj qhov ntau dua resple zog (350 mpa vs. 250 mpa mpa mpa mpa), lub ntsiab lus nws tuaj yeem pab txhawb 40% ntau dua thauj khoom ua ntej nws pib khoov mus tas li.
* ** Cov tshuaj xyaw: ** Yuav kom ua tiav lub zog no muaj zog, 350 qib sib xyaw muaj cov tshuaj sib txawv xws li cov pa roj carbon lossis manganese piv rau 250 qib steel.
* ** DAIM NTAWV THOV: ** Vim nws lub zog siab dua, 350 qib steel tso cai rau kev tsim cov txheej txheem sib xyaw ua ke raws li cov khoom sib xyaw ua los ntawm 250 qib steel. Qhov no tuaj yeem ua rau cov khoom khaws nyiaj thiab tsim qauv ntau. Hloov siab, 250 qib steel yog ib tug ntau dua dav- cov hom phiaj, siv hlau me, siv rau qhov twg muaj zog tsis yog lub ntsiab.
### 4. Dab tsi ntawm cov hlau yog 415 MPa?
Ib qho steel nrog cov txiaj ntsig muaj zog ntawm 415 MPa feem ntau hu ua ** FE 415 ** hauv tus qauv Indian (yog) siv rau kev txhawb nqa hlau (rebar). Qhov "Fe" sawv rau hlau (ferrite), thiab "415" txhais tau tias tsawg kawg muaj zog hauv MPA. Qeb no yog qhov siab - Lub zog Densormed Steel nyob rau hauv kev txhawb zog qhob vaj tse zoo li vaj tse, txuas ntxiv vaj tse, thiab cov neeg sib txuas.
### 5. Qhov twg yog qhov zoo dua FE 415 lossis FE 500?
"Zoo dua" nyob ntawm nkaus xwb nyob rau hauv cov kev cai tshwj xeeb ntawm txoj haujlwm kev tsim kho. Qhov sib txawv tseem ceeb yog lawv ** zog thiab ductility **.
* ** FE 500 ** muaj lub zog siab dua lub zog (500 MPA) tshaj ** FE 415 ** (415 mpa). Qhov no txhais tau tias FE 500 muaj zog dua thiab tuaj yeem nqa cov nra hnyav. Siv FE 500 tuaj yeem tso cai rau kev txo qis ntawm cov hlau uas xav tau hauv tus qauv, ua rau cov khoom txuag thiab muaj feem txo tus nqi.
* ** FE 415 **, thaum tsis muaj zog, feem ntau muaj ** zoo dua ductility **. Ductility yog lub peev xwm ntawm cov hlau kom ncab thiab deform yam tsis muaj kev phom sij hauv av, uas yog qhov teeb tsa kom nqus tau lub zog thiab ua ntej tsis ua haujlwm.
** Xaus: ** FE 500 tau zoo dua rau kev ua lub zog thiab cov khoom siv ua tau zoo hauv cov qauv qauv. FE 415 (lossis nws ntau dua ntau ntau yam sib txawv Tus kws ua choj ua qhov kev xaiv zaum kawg raws li cov qauv tsim thiab cov cim hauv tsev hauv cheeb tsam.
