S690 steel, cais raws li cov khoom siv hluav taws xob siab, yog ib feem ntawm European tus qauv EN 10025-6. Nws yog qhov tshwj xeeb ntawm nws lub zog siab thiab zoo heev weldability, ua rau nws haum rau ntau yam kev thov hauv kev tsim kho thiab engineering. Lub ntsiab alloying hauv S690 steel muaj xws li carbon (C), manganese (Mn), thiab silicon (Si), nrog rau me me ntawm lwm yam xws li chromium (Cr), nickel (Ni), thiab molybdenum (Mo) uas txhim kho nws cov khoom siv kho tshuab.
Qhov zoo ntawm S690 Steel:
- Siab zog - rau - Qhov hnyav piv:Pab kom tsim cov qauv sib dua.
- Weldability zoo heev:Haum rau ntau yam txheej txheem vuam, yooj yim fabrication.
- Zoo Toughness:Khaws kev ua haujlwm hauv qhov chaw qis - qhov kub thiab txias.
Kev txwv ntawm S690 Steel:
- Tus nqi:Siab dua li cov qauv steels vim yog cov ntsiab lus alloying.
- Brittleness ntawm Tsawg Kub:Yuav tsum tau ua tib zoo xav hauv qhov chaw txias.
- Limited Corrosion Resistance:Tej zaum yuav xav tau cov txheej txheem tiv thaiv hauv qhov chaw nruj heev.
S690 steel tau txais txiaj ntsig tseem ceeb hauv kev ua lag luam vim nws qhov kev ua tau zoo hauv kev tsim kho hnyav, tsuas, thiab kev siv sab nrauv. Nws cov keeb kwm tseem ceeb nyob rau hauv nws txoj kev loj hlob kom tau raws li qhov kev xav tau ntawm cov ntaub ntawv muaj zog dua thiab muaj txiaj ntsig zoo hauv kev tsim vaj tsev niaj hnub no.
2 Lwm lub npe, qauv, thiab sib npaug
| Standard Organization | Qib / Qib | Lub teb chaws / cheeb tsam ntawm Keeb Kwm | Lus Ceeb Toom/Cov Lus Qhia |
|---|---|---|---|
| UNS | S690 qw | Teb chaws USA | Qhov sib npaug ze tshaj EN 10025-6 |
| ASTM | A572 Qib 65 | Teb chaws USA | Cov kev sib txawv me me |
| EN | S690 qw | Teb chaws Europe | Feem ntau siv rau hauv kev siv cov qauv |
| DIN | 1.8928 | Lub teb chaws Yelemees | Sib npaug rau S690QL |
| JIS | SM490 IB | Nyiv | Zoo sib xws yield zog tab sis sib txawv muaj pes tsawg leeg |
| ISO | 10025-6 | Thoob ntiaj teb | Standard rau high yield zog structural steels |
Qhov sib txawv ntawm cov qib no tuaj yeem cuam tshuam rau kev ua tau zoo. Piv txwv li, thaum S690QL thiab A572 Qib 65 yuav muaj cov txiaj ntsig zoo sib xws, lawv cov tshuaj muaj pes tsawg leeg thiab cov yam ntxwv tawv tuaj yeem sib txawv, cuam tshuam rau lawv qhov tsim nyog rau cov ntawv thov tshwj xeeb.
Nws lub zog tawm los nominal ncav cuag 690 MPa (lub hauv paus ntawm "S690"), nrog lub zog tensile xws li 770-940 MPa, deb tshaj li cov pa roj carbon zoo tib yam. Nws yog alloyed nrog cov ntsiab lus xws li manganese, chromium, npib tsib xee thiab molybdenum los txhim kho hardenability thiab mechanical zog, ces undergoes quenching thiab tempering kub kho kom sib npaug zog, ductility thiab weldability.
S690 steel nta kev ua tau zoo tshaj plaws: siab load-cov kabmob muaj peev xwm, zoo qis-kub toughness, corrosion kuj thiab machinability, nrog nruj tswj cov ntsiab lus impurity kom tsis txhob brittleness. Nws yog dav siv nyob rau hauv hnyav engineering teb xav tau siab structural kev ntseeg tau, xws li kev tsim kho machinery (excavator caj npab, crane booms), offshore platforms, choj qauv, armored tsheb thiab siab - lub nkoj siab, haum rau hnyav ua hauj lwm tej yam kev mob nrog hnyav loads, tsis tshua muaj kub los yog corrosion txaus ntshai.
Cov qib sib xws suav nrog S690QL (L rau kev txhim kho qis-kub toughness) thiab S690Q, sib txawv feem ntau hauv qis- qhov kub thiab txias cuam tshuam los hloov mus rau ntau qhov chaw huab cua.