S690 qwyog muab faib thiab tsim raws li ib tug high yield zog structural steel nyob rau hauv ua raws li European tus qauv EN 10025-6 vim muaj kev sib xyaw ntawm cov khoom siv tshwj xeeb, cov txheej txheem tsim khoom, thiab npaj siv engineering uas ua tau raws li cov qauv txheej txheem rau pawg no.
Nov yog cov ncauj lus kom ntxaws txog vim li cas nws haum qhov kev xaiv no:
1. Kev txhais ntawm "High Yield Strength Structural Steel"
Raws li European standardization, "high yield zog structural steels" yog txhais los ntawm:
Yam tsawg kawg nkaus Yield Strength:Feem ntau pib ntawm 460 MPa thiab nce mus txog 960 MPa+.
Primary Standard:TS EN 10025-6 yog qhov tshwj xeeb ntawm EN 10025 series tshwj xeeb rau cov hlau no: * "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."*
Key Differentiator:Cov qhabnias no tsis yog tsim los ntawm qhov yooj yim kub- dov. Lawv tau txais cov khoom siv thermo zoo-kev ua tshuab (TMCP) lossis kev kho cua sov (xws li Quenching & Tempering) kom ua tiav lawv cov khoom txhim kho.
2. Yuav ua li cas S690QL ua tau raws li cov lus txhais no
'S'=Cov Qauv Hlau:Lub prefix "S" categorizes nws raws li ib tug hlau feem ntau rau load- bearing lug, distinguishing nws los ntawm cov cuab yeej steels, stainless hlau, thiab lwm yam.
'690'=High Yield Strength:Tus naj npawb 690 qhia qhov tsawg kawg nkaus lub zog (ReH) ntawm 690 Megapascals rau thicknesses txog 16 hli. Qhov no tso nws khov kho nyob rau sab sauv echelon ntawm standardized structural steel zog. Rau kev sib piv, cov qauv steel S355 muaj lub zog tawm los ntawm 355 MPa.
'QL'=Quenched thiab Tempered:Qhov no yog cov txheej txheem tsim khoom tseem ceeb uas ua rau muaj lub zog siab nrog kev siv tau zoo.
Quenching(sai txias) tsim ib qho nyuaj, tab sis brittle microstructure (martensite).
Tempering(reheating rau ib qho qis qis) ces txo brittleness, relieves kev nyuaj siab, thiab muab qhov tsim nyog toughness thiab ductility rau cov qauv siv.
Ua raws li EN 10025-6:Los ntawm kev ua raws li tus qauv no, S690QL lav tsis yog lub zog xwb, tab sis tag nrho cov khoom tsim nyog txhua yam thiab tshuaj lom neeg:
Tensile zog ntau yam:Feem ntau yog 770 - 940 MPa.
Yam tsawg kawg nkaus toughness:Yuav tsum tau Charpy V-tus nqi ntawm 27 Joules ntawm -40℃(rau S690QL) lossis -60℃(rau S690QL1). Qhov no toughness yogtseem ceebrau nws classification li atus qauvsteel, raws li nws yuav tsum tiv taus brittle puas.
Strict Chemical Composition:Kev txwv ntawm carbon, sulfur, phosphorus, thiab alloying ntsiab kom ntseeg tau tias weldability thiab toughness.
3. Kev Tsim Nyog Kev Tsim Nyog: Vim Li Cas Lub Hwj Chim Siab Zoo li "Structural"
Daim ntawv thov "structural" yog qhov tseem ceeb. S690QL tsis yog rau kev ua riam lossis cov kabmob; nws yog rau kev tsim cov khoom uas muaj zog heev - rau - qhov hnyav piv yog tus tsim qauv tsav tsheb:
Mobile Crane Booms & Jibs:Txhawm rau kom ncav cuag qhov siab tshaj plaws thiab nqa lub peev xwm nrog qhov tsawg kawg nkaus qhov hnyav.
Heavy Mining Khoom:(Excavator caj npab, tsheb thav duab) tiv taus dynamic loads loj heev.
Advanced Tsim Machinery.
Cov Cheebtsam tseem ceeb hauv Offshore & Lifting Iav.
Hauv cov ntawv thov no, cov hlau yuav tsum ua ntau tshaj li qhov muaj zog; nws yuav tsum tau welded, tiv taus qaug zog, tiv thaiv kev cuam tshuam, thiab ua tau zoo nyob rau hauv qhov sib txawv ntawm qhov kub thiab txias -tag nrho cov cim ntawm cov khoom siv.
Kev sib piv nrog lwm hom hlau
| Hom hlau | Piv txwv | Ntsiab Feature | Primary Standard (Piv txwv) | Lub hom phiaj |
|---|---|---|---|---|
| Mild Structural Steel | S235 JR | Tus nqi qis, zoo formability | TS EN 10025-2 | Kev tsim kho dav dav, vaj tse |
| High Strength Structural Steel | S690 qw | Ultra{0}}siab zog & toughness | TS EN 10025-6 | Qhov hnyav- tseem ceeb, siab - cov qauv kev ntxhov siab |
| Hnav-Resistant Steel | TSI AR400 | High deg hardness | Muaj tswv | Mining thoob, liners (ua kom puas) |
| Cov cuab yeej hlau | 1.2379 | High hardness & kub hardness | TS EN ISO 4957 Kev Tswj Xyuas Kev Nyab Xeeb | Txiav, tsim cov cuab yeej |
S690QL belongs rau kab thib ob:Nws lub hom phiaj yog kev ncaj ncees nyob rau hauv qhov hnyav loads, tsis nto hnav tsis kam los yog txiav peev xwm.
Xaus: The Synthesis
S690QL yog qib siab yield steel qib ua raws li EN vim:
Nws muaj ib qho kev cai tsawg kawg nkaus tawm lub zog (690 MPa) uas muab tso rau hauv "siab yield" qeb raws li European cov cai.
Nws yog tsim los ntawm tus txheej txheem, tswj hwm (Quenching & Tempering) tau teev tseg hauv EN 10025-6 kom ua tiav lub zog ntawd nrog rau qhov yuav tsum tau ua kom muaj zog.
Nws lub hom phiaj siv yog rau kev tsim kho, thauj khoom -cov kabmob uas nws qhov sib xyaw ua ke ntawm lub zog hnyav, txaus toughness, thiab weldability daws qhov hnyav lossis qhov chaw tshwj xeeb- txwv kev tsim cov nyom.
Kev ua raws li "EN" muab kev lees paub, cov khoom siv rov ua dua tshiab (tshuaj lom neeg, tshuab, thev naus laus zis) uas cov kws tshaj lij tuaj yeem hais meej thiab tsim kom muaj kev nyab xeeb.
Hauv luv luv,lub npeS690 qwQhov no yog ib tug concise code txhais los ntawm EN 10025-6 uas qhia ib tug engineer: "Qhov no yog ib tug quenched thiab tempered steel nrog ib tug guaranteed yield zog ntawm yam tsawg kawg nkaus 690 MPa thiab pov thawj toughness ntawm -40 degree, haum rau tsim tau heev npaum, tseem ceeb qauv."