S460Q (tseem stylized li S460QL)yog qhov siab heev -lub zog, quenched thiab tempered structural steel tsim los rau qhov xav tau tshaj plaws, hnyav- cov ntawv thov tseem ceeb. Nws belongs rau tsev neeg ntawm "hnav-resistant" steels siv nyob rau hauv hnyav engineering, tsis tsim qauv.
Ntawm no yog cov ncauj lus kom ntxaws.
1. Kev txiav txim lub npe: "S460Q"
Ua raws li EN 10025-6 tus qauv:
S: Kev tsim qauvhlau.
460:Yam tsawg kawg nkaus yield zog hauv MPa (rau thickness Tsawg dua los yog sib npaug rau 16 hli). Qhov no yog qhov tshwj xeeb siab.
Q:Stands rau Quenched & Tempered (QL=quenched thiab Tempered, Tsawg kub cuam tshuam).
L:Feem ntau ntxiv, txhais tau tias Tsawg kub cuam tshuam toughness.
Nco tseg:"S460Q" yog cov lus luv luv, tab sis cov npe hauv EN 10025-6 yog S460QL lossis S460QL1.
2. Kev Tswj Tus Txheej Txheem
S460Q yog txhais los ntawm EN 10025-6: 2019 - * "Cov khoom kub dov ntawm cov qauv hlau - Ntu 6: Kev xa tawm cov xwm txheej rau cov khoom lag luam tiaj tus ntawm cov khoom siv hluav taws xob muaj zog hauv cov txheej txheem quenched thiab tempered."*
Qhov no yog tus qauv tshwj xeeb rau cov qib siab tshaj plaws, txawv ntawm cov khoom qub (N) lossis thermomechanical (M) steels.
3. Cov yam ntxwv tseem ceeb & Vim li cas thiaj siv
S460Q yog ib qho ultra- siab- steel kev ua tau zoo siv qhov twg lub zog - rau - qhov hnyav piv yog qhov tseem ceeb.
Muaj zog heev:
Min. Yield zog (ReH): 460 MPa (thiab feem ntau mus txog 550-690 MPa tiag).
Min. Tensile zog (Rm): 550 - 720 MPa.
Cov txiaj ntsig: Tso cai rau qhov hnyav txo qis lossis ua kom cov qauv ua kom muaj zog hnyav. Qhov no yog nws qhov laj thawj tseem ceeb rau kev siv.
Zoo heev Low-Tsub Toughness:
Impact Test: Charpy V-notch ntawm -40℃(rau QL qib) lossis -60℃(rau QL1 qib).
Tsawg Zog: 30-40 Joules (nyob ntawm qhov tuab thiab qib qis).
Cov txiaj ntsig: Khaws cov ductility thiab tawg tsis kam nyob rau hauv arctic tej yam kev mob los yog kev nyab xeeb - daim ntawv thov tseem ceeb dynamic.
Quenched & Tempered Condition (Lub "Q"):
Nov yog ob -kev kho cua sov:
Quenching: ceev ceev cua txias los ntawm ~ 900 degree, tsim ib tug heev nyuaj, nkig martensitic qauv.
Tempering: Reheating rau qhov kub thiab txias (xws li, 550-650 degree) kom rov ua kom tawv thiab ductility thaum tuav lub zog siab.
Qhov tshwm sim: Ib qho zoo, homogeneous microstructure uas muaj qhov zoo tshaj plaws ua ke ntawm lub zog thiab toughness rau nws qib zog.
Weldability zoo (nrog cov txheej txheem nruj):
Txawm hais tias nws lub zog siab, nws muaj kev tswj hwm, qis qis Carbon Equivalent (CEV)-feem ntau Tsawg dua lossis sib npaug li 0.47%- ua rau nws vuam.
Tseem ceeb: Vuam yuav tsum muaj cov txheej txheem nruj (WPS), suav nrog ua ntej- cua sov, qis- hydrogen electrodes, thiab tswj cov cua sov kom tiv thaiv kom tawv thiab tawg hauv tshav kub- thaj chaw cuam tshuam (HAZ).
4. Tshuaj muaj pes tsawg leeg
Nws yog ib qho qis- alloy steel nrog meej ntxiv kom ua tiav hardenability thiab toughness.
Cov pa roj carbon (C): ~ 0.16% (max) - khaws cia qis rau weldability.
Manganese (Mn): ~ 1.70% (max)
Silicon (Si): ~ 0.80% (max)
Micro- alloys: Niobium (Nb), Vanadium (V), Titanium (Ti), Boron (B) hauv me me rau cov nplej ua kom zoo thiab tawv tawv.
Tsawg Impurities: Phosphorus thiab Sulfur tsawg heev (P, S Tsawg dua lossis sib npaug li 0.025%).
5. Sib piv nrog Lwm Cov Siab -Strength Steels
| Qib | Txuj | Qhov xwm txheej | Tsawg-yield (MPa) | Ntsiab Feature | Kev siv yam |
|---|---|---|---|---|---|
| S355N | TS EN 10025-3 | Li qub | 355 | Zoo toughness ntawm -20 degree | General hnyav lug |
| S420M | TS EN 10025-4 | Thermomechanical | 420 | Siab zog, tsis muaj cua sov kho | Cov choj, cranes |
| ➤ S460Q/QL | TS EN 10025-6 | Quenched & Tempered | 460 | Qhov kawg lub zog / toughness combo | Mining, hnyav khoom siv mobile |
| S500Q/QL | TS EN 10025-6 | Quenched & Tempered | 500 | Txawm muaj zog dua | Cov tub rog tshwj xeeb, cov qauv siab heev |
| S700Q/QL | TS EN 10025-6 | Quenched & Tempered | 700 | Ultra{0}}lub zog siab | Armor phaj, kev siv ballistic |
6. Cov ntawv thov tseem ceeb
S460Q yogtsis yog rau cov tsev lossis choj. Nws yog rauheev engineeringqhov twg hnyav yog tus yeeb ncuab.
Mining & Heavy Machinery:Cov thoob, booms, thiab thav ntawv rau excavators, draglines, thiab pob tseg tsheb. Txo qhov hnyav nce payload thiab roj efficiency.
Mobile Crane Booms & Jibs:Tso cai rau ntev ncav cuag nrog tsawg dua qhov hnyav.
Commercial Tsheb Chassis:Rau siab - cov tsheb thauj khoom thiab cov tsheb thauj khoom uas txhua kilogram khaws cia txhais ua ntau cov khoom thauj.
Agricultural Khoom:Siab -cov khoom muaj zog hauv kev sib xyaw ua ke thiab cov tshuab txiav.
Khoom siv:Advanced forklift masts thiab lifting ntas.
Zog Sector:Cheebtsam rau hnyav lifting iav nyob rau hauv offshore thiab cua industries.
Tub rog tsheb:Armored tsheb Cheebtsam uas lub zog thiab qhov hnyav yog qhov tseem ceeb.
7. Cov ntaub ntawv tseem ceeb ntawm Fabrication
Txiav:Plasma lossis laser txiav yog nyiam. Oxy-kev txiav roj yuav tsum tau saib xyuas kom tsis txhob tawv tawv.
Kev tsim:Kev sib sau txias yog ua tau tab sis yuav tsum muaj zog ntau dua; kub sib sau tej zaum yuav xav tau rau cov duab complex.
Vuam: Kev tsim nyog tus txheej txheem tsim nyog.Yuav tsum tau ua ntej- cua sov (feem ntau 100-150 degree), qis- cov txheej txheem hydrogen (piv txwv li, SMAW nrog cov electrodes yooj yim, MAG vuam nrog cov roj tshwj xeeb), thiab qee zaum tom qab vuam kub kho (PWHT).
Tus nqi: Tus nqi kim duatshaj li qub lossis thermomechanical steels vim kev kho cua sov ua haujlwm.
Cov ntsiab lus
S460Q/QL yog ib qho ultra- siab{2}} lub zog (460+ MPa tawm los), quenched thiab tempered structural steel nrog guaranteed toughness ntawm qhov kub thiab txias (-40℃rau -60℃). Nws sawv cev rau tus pinnacle ntawm qhov hnyav-tsim qauv tsim, qhov uas ua kom lub zog loj tshaj plaws thaum tuav weldability thiab tawg tsis kam yog tsis sib tham.Nws siv tshwj xeeb, tsim nyog los ntawm kev ua tau zoo uas tsis tuaj yeem ua tau raws li qib S355 lossis S420, thiab nws xav tau kev paub txog kev tsim khoom.