Lub ntsiab
Q235 thiab Q355 yog ob lub tsev siv hluav taws xob hauv Suav. Lawv qhov sib txawv tseem ceeb nyob rau cov txiaj ntsig lub zog thiab cov ntsiab lus alloying:
Q235: Tsawg {{{{{- Cov hlau hlau nrog ib qho txiaj ntsig zoo dua lossis muaj sib npaug rau ntawm 235 MPa, haum rau lub teeb {{cov txheej txheem.
Q355: High {{{{{}} lub zog qis - all load load {} - Thov cov qauv.
Cov kev sib txawv no tsuas yog cov tshuaj sib xyaw ua ke rau lawv cov tshuaj muaj pes tsawg leeg, cov khoom siv mechanies, Weldability, thiab cov ntawv thov pom zoo.
Tshuaj Yeeb Nkab Sib Piv
| Lub ntsiab | Q235 | Q355 |
|---|---|---|
| Carbon (c) | 0.14–0.22% | 0.12–0.20% |
| Manganese (mn) | 0.30–0.70% | 1.00–1.60% |
| Silicon (si) | Tsawg dua los yog sib npaug rau 0.30% | Tsawg dua los yog sib npaug rau 0.55% |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.045% | Tsawg dua los yog sib npaug rau 0.045% |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.045% | Tsawg dua los yog sib npaug rau 0.045% |
| Niobium (nb) | – | 0.015–0.060% |
| Vanadium (V) | – | 0.02–0.15% |
| Titanium (ti) | – | 0.2% |
Cov ntsiab lus tseem ceeb: Q355 muaj ntau dua manganese thiab micro -} alloy ecoying, hardness, thiab qis} kev ua haujlwm.
Cov Khoom Siv Neeg Kho Tshuab
| Ntiag tug | Q235 | Q355 |
|---|---|---|
| Paib lub zog | Ntau dua los yog sib npaug rau 235 MPa | Ntau dua los yog sib npaug rau 345 mpa (qee cov qauv loj dua lossis sib npaug rau 355 mpa) |
| Lub zog tensile | 370-500 mpa | 450-650 MPa |
| Elongation | Ntau dua los yog sib npaug rau 26% | Ntau dua los yog sib npaug rau 21% |
| Yas Plyam & Kev Muaj | Siab, zoo heev txias dabtsi yog khoov | Me ntsis qis dua vim muaj hardness ntau dua |
| Hwj txwv | Zoo tshaj | Zoo, tej zaum yuav tsum tau preheating rau tuab tshooj |
Ua cov ntawv:
Q235: Kev muaj txiaj ntsig zoo heev thiab muaj peev xwm; Haum rau h bars xav tau cov duab.
Q355: Ua haujlwm muaj zog - hationening kev ua tau; Tej zaum yuav xav tau kev kho cua sov los yog quenching thaum txias - deformed.
Kev Pom Zoo Pom Zoo thiab Kev Coj Ua
Xim: Tshiab txiav Q235 tshwm sim xiav - grey, thaum Q355 yog xim liab me ntsis vim muaj cov ntsiab lus zoo dua vim yog cov ntsiab lus ntau dua li cov ntsiab lus siab dua.
Kev sim ntsuas: Sib tsoo Q235 tsim tawm puag ncig, cov xim liab liab, hos q355 tsim cov ci ntsa iab, ceg ci ntsa iab.
Cov Ntawv Thov Pom Zoo
| Qib hlau | H - nqaj / cov qauv txheej txheem | Cov ntsiab lus tseem ceeb |
|---|---|---|
| Q235 | Nruab Nrab {{0} Kev Siv Hluav Taws Xob, Lub Teeb Muaj Vaj Tse | Tus nqi -}}} ua tau zoo, siab ductility, yooj yim fabrication thiab vuam |
| Q355 | Hnyav {{{0} Kev ntim cov moj khaum, high -}}} rise tsev, txuas hniav | High Tensile / Yield lub zog, ruaj khov nyob rau hauv lub zog ruaj khov, zoo tsawg - kub ua tau zoo |
Siv Q235 rau lub teeb lossis nruab nrab- Cov phiaj xwm qhov twg, qhov twg tus nqi, ductility, thiab weldability yog qhov tseem ceeb.
Siv Q355 rau qhov tseem ceeb lossis hnyav {{- log qauv, xav tau siab lub zog, tawv, thiab ntev} lub sij hawm ruaj khov.
