S690QL yog lub zog siab quenched thiab tempered steel qib uas ua raws li cov lus qhia steel EN 10025. Cov npe S690QL yog hais txog qhov tsawg kawg nkaus yield zog ntawm 690 MPa.
Kev sib xyaw ua ke ntawm qhov muaj txiaj ntsig zoo thiab tus nqi thiab lub zog siab ua ke nrog kev yooj yim ntawm kev tsim tau ua rau S690QL steel phaj yog qib nrov rau ob qho tib si mobile daim ntawv thov xws li cranes thiab lifting khoom thiab ruaj steel qauv. Lub zog muaj zog ntawm cov hlau no txhais tau hais tias cov qauv tsim tuaj yeem tsim sib dua thiab rau daim ntawv thov txawb no txhais tau tias nce kev them nyiaj thiab kev ua haujlwm tau zoo.
| Cov tshuaj muaj pes tsawg leeg ntawm S690QL % Max | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
C |
SI |
Mn |
P |
S |
N |
B | Cr | Cu | Mo | Nb | Ni | Ti | V | Zr |
| 0.2 | 0.80 | 1.70 | 0.025 | 0.015 | 0.015 | 0.005 | 1.50 | 0.50 | 0.70 | 0.06 | 2.0 | 0.05 | 0.12 | 0.15 |
| Mechanical Properties ntawm S690QL | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lub npe | Mechanical Properties (ambient kub) | ||||||||||
| Lub npe hlau | Hlau Number | Min. Yield zog ReH MPa | Tensile zog Rm MPa | Min. & elongation tom qab tawg | |||||||
| Nominal thickness (hli) | Nominal thickness (hli) | ||||||||||
| >3 <50 | >50 <100 | >100 <150 | >3 <50 | >50 <100 | >100 <150 | ||||||
| S690 qw | 1.8931 | 690 | 650 | 630 | 770/940 | 760/930 | 710/900 | 14 | |||
| V notch impact test | |||||
|---|---|---|---|---|---|
|
Qib |
Qauv Orientation |
ntawm 0 degree |
ntawm -20 degree |
ntawm -40 degree |
ntawm -60 degree |
| S690 qw | Ntev | 50J | 40J | 30J | |
| S690 qw | Hloov | 35J | 30J | 27J | |
Dab tsi yog qhov txawv ntawm S690QL thiab ntau dua S355 steel?
Qhov txawv yog qhov tob. S690QL muaj kwv yees li ob npaug ntawm lub zog tawm los (690 MPa vs . 355 MPa). Qhov no tso cai rau cov neeg tsim qauv siv cov khoom sib dua, sib dua los nqa tib lub nra, lossis ua kom muaj peev xwm ua tau zoo ntawm cov qauv zoo sib xws. S690QL tseem quenched thiab tempered nrog guaranteed tsawg -kub toughness, whereas txheem S355 feem ntau yog xa raws li ib txwm los yog thermomechanically dov nrog qis toughness specs.
S690QL puas tuaj yeem txuas rau ntawm -site, thiab dab tsi yog qhov kev ceev faj tseem ceeb?
Yog, tab sis nrog kev tswj nruj heev. Nws tsis zoo li welding me me hlau. Cov kev ceev faj tseem ceeb muaj xws li:
Kev Tsim Nyog Kev Tsim Nyog: Cov txheej txheem Vuam Specification (WPS) tsim nyog rau tus qauv tsim nyog (xws li EN ISO 15614) yog qhov yuav tsum tau ua.
Ua ntej-heat & Interpass Temperature: nruj me ntsis kom tiv thaiv hydrogen-induced txias cracking (HICC). Kub nyob ntawm thickness thiab CEV.
Consumables: Yuav tsum siv qhov sib txuam siab -lub zog, qis- hydrogen electrodes los yog nyob ntawm tej (xws li, kev faib ua piv rau 690 MPa zog).
Thaum tshav kub kub Input Control: Yuav tsum nyob twj ywm nyob rau hauv qhov tsim nyog ntau yam los khaws cov cua sov- cuam tshuam cheeb tsam (HAZ) cov khoom.
Tshaj tawm -Kev Kho Hniav Kub (PWHT): Feem ntau xav tau rau cov ntu tuab kom txo tau qhov kev ntxhov siab thiab npau taws HAZ.
S690QL piv rau S890QL li cas? Thaum twg koj xaiv ib qho ntxiv?
Nws yog kev lag luam - tawm ntawm qhov kawg ntawm lub zog thiab fabricability / nqi.
S890QL: Siab zog (890 MPa tawm los) kom txuag tau qhov hnyav tshaj plaws. Txawm li cas los xij, feem ntau nws muaj zog dua, nyuaj rau vuam (CEV siab dua, cov txheej txheem nruj dua), thiab kim dua.
S690QL: "qhov chaw qab zib" rau ntau daim ntawv thov. Muab qhov hnyav hnyav tshaj S355 nrog zoo dua tag nrho weldability, toughness, thiab feem ntau zoo formability tshaj S890QL ntawm tus nqi qis.
Kev Xaiv Tsav Tsheb: Yog tias tus qauv tsim muaj zog- txwv thiab txhua kilogram khaws tseg yog qhov tseem ceeb (piv txwv li, crane boom tip), S890QL tuaj yeem xaiv. Yog tias tus qauv tsim muaj kev sib txuas, kev thauj khoom siab, lossis tus nqi rhiab heev, S690QL feem ntau yog qhov kev nyiam, kev daws teeb meem ntau dua.
Dab tsi yog cov subgrades ntawm S690QL thiab lawv txhais li cas?
Subgrades txhais qhov ntsuas qhov ntsuas kub:
S690QL: Qib qib. Qhov ntsuas kub (feem ntau -40℃lossis -60 degree) thiab lub zog yuav tsum tau pom zoo thaum lub sijhawm xaj.
S690QL1: Ib qho kev qhia tshwj xeeb, feem ntau subgrade uas tau lees paub qhov tsawg kawg ntawm 40 Joules cuam tshuam lub zog ntawm -40℃rau txhua qhov tuab. Qhov no muab ib tug meej, high-toughness specification.
Puas yog S690QL corrosion resistant?
No. S690QL tsis yog huab cua lossis stainless hlau. Nws cov corrosion kuj zoo ib yam li cov pa roj carbon zoo tib yam. Rau corrosive ib puag ncig (xws li, offshore), nws yuav tsum muaj kev tiv thaiv los ntawm kev pleev xim tshuab, galvanizing, lossis hlau txau. Kev siv nws nyob rau hauv qhov tsis muaj xim yuav ua rau xeb