S690QL1 steel yog siab -lub zog, quenched thiab tempered structural steel phaj, txhais los ntawm EN 10025-6 tus qauv. Nws yog feem ntau siv rau kev thov cov ntawv thov uas xav tau lub zog tshwj xeeb thiab tawv, tshwj xeeb tshaj yog nyob rau hauv qhov chaw txias.
Cov khoom tseem ceeb
'S' hauv S690QL1 sawv cev rau cov qauv hlau, '690' qhia tias qhov tsawg kawg nkaus tawm lub zog hauv MPa, 'Q' txhais tau hais tias nws tau muab rau hauv qhov kub thiab txias, thiab 'L1' qhia tau tias nws tau txhim kho qhov cuam tshuam rau kev sim ntawm-60 degree.
| Khoom | Tus nqi (rau nominal thickness Tsawg dua los yog sib npaug rau 50mm) | Qhov chaw |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 690 MPa ua | |
| Tensile zog | 770 - 940 MPa | |
| Elongation | Tsawg kawg 14% | |
| Impact Toughness | Yam tsawg kawg 30 J ntawm -60℃(Transverse) |
Cov ntawv thov siv
S690QL1 steel paub txog nws lub zog siab - rau- qhov hnyav piv, uas tso cai rau cov qauv sib dua yam tsis muaj kev cuam tshuam txog kev nyab xeeb lossis kev ua haujlwm. Nws superior mechanical zog ua rau nws haum rau:
Heavy engineering thiab kev tsim kho tshuab
cranes thiab lifting khoom
Txuas hniav thiab offshore platforms
Cov cuab yeej siv mining
Cov hlab ntsha siab thiab cov khoom siv hauv tsev
Vuam S690QL1 kom raug yuav tsum muaj kev nruj, txheej txheem-tsav mus kom ze los khaws nws qhov tshwj xeeb qis- qhov kub thiab txias (tseem ceeb ntawm -60 degree) thiab lub zog siab thaum tiv thaiv qhov tsis xws luag xws li hydrogen-induced cracking (txias cracking) los yog ntau heev softening cheeb tsam (HA).
Ntawm no yog ib qho yooj yim, kauj ruam-los ntawm- cov lus qhia kauj ruam raws li kev coj ua zoo tshaj plaws hauv kev lag luam thiab cov qauv (EN 1011-2, EN ISO 15614-1):
1. Qhov tseem ceeb ua ntej- Weld Requirements
Kev Tsim Nyog Kev Tsim Nyog: Cov txheej txheem Vuam Specification (WPS) yuav tsum tsim nyog los ntawm kev xeem (xws li, raws li EN ISO 15614-1) ua ntej vuam ntau lawm. Qhov no yog qhov yuav tsum tau ua.
Cov ntaub ntawv pov thawj: Txheeb xyuas cov hlau thiab cov khoom siv hlau ua tau raws li cov qauv xav tau (EN 10025-6 rau S690QL1).
Kev Tsim Kho & Kev Npaj: Siv tau zoo- tshuab bevels (tsis txhob muaj thaib). Tshem tawm tag nrho cov kab mob (xeb, roj, pleev xim, ya raws) yam tsawg 30 hli ntawm qhov sib koom ua ke.
2. Filler Hlau Xaiv
Hom: Siv tsuas yog qis -hydrogen electrodes/wires. Kev xaiv ntau:
SMAW (MMA): Basic-coated electrodes (piv txwv li, kev faib tawm rau EN ISO 18276-A: E 69 6 2Ni B 6 2 H5).
GMAW/FCAW: Flux-cored lossis hlau-cored xov hlau (eg, T 69 6 2Ni M H5).
Strength Matching: Feem ntau, undermatching muab tub lim hlau (xws li, nrog ~ 620 MPa yield zog) yog nyiam los txhim kho weld hlau toughness thiab txo kev tawg rhiab heev, tshwj tsis yog qhov tsim tshwj xeeb yuav tsum muaj zog sib xws.
Cia & tuav: Khaws cov electrodes / flux hauv qhov cub kom qhuav ntawm 100-150℃tom qab qhib. Siv tam sim tom qab tshem tawm kom tsis txhob nqus hydrogen.
3. Qhov tseem ceeb Vuam Parameters
Preheat & Interpass Temperature: nruj me ntsis tswj.
Hom Preheat: 125-175 degree, nyob ntawm thickness thiab txwv (siab dua rau cov seem tuab).
Interpass Range: Khaws preheat raws li qhov tsawg kawg nkaus, tab sis tsis txhob tshaj 200-225℃kom tsis txhob HAZ softening ntau dhau.
Thaum tshav kub kub input: yuav tsum nyob rau hauv ib tug nqaim, tsim nyog ntau yam (piv txwv li, 0.6-1.2 kJ / mm).
Tsawg dhau → txaus ntshai, nkig HAZ.
Siab dhau → kev loj hlob ntau dhau lawm thiab poob ntawm toughness hauv HAZ.
Vuam Technique: Siv stringer hlaws dai los yog me ntsis weave. Tsis txhob ntev arcs thiab xyuas kom zoo fusion phab ntsa. Siv cov tam sim no qis rau hauv paus hla.
4. Tshaj tawm -Kev kho Weld
Post-Weld Heat Treatment (PWHT): Often required for thick sections (>30 mm) los yog cov pob qij txha nruj heev. Kev xyaum ua ntau yog kev ntxhov siab ntawm 550-600℃kom txo qis kev ntxhov siab thiab npau taws HAZ.
Slow Cooling: Tom qab vuam, insulate lub weldment kom maj mam txias rau ambient kub, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig txias.
5. Kev Tshawb Fawb & Kev Ntsuas
Tsis yog-Kev Ntsuam Xyuas Kev Puas Tsuaj (NDT): Yuav tsum tau ua rau cov vuam tseem ceeb (Ultrasonic Testing - UT, Sib Nqus Particle Testing - MT).
Kev Ntsuas Hardness: Txhawm rau txheeb xyuas HAZ hardness tseem nyob hauv qhov kev txwv (feem ntau Tsawg dua lossis sib npaug rau 380 HV10).
Charpy Impact Testing of Weld & HAZ: Feem ntau yuav tsum tau ntawm -60℃kom tsim nyog cov txheej txheem.
Cov ntsiab lus:
Vuam S690QL1 yog cov txheej txheem tswj tau zoo tshaj plaws los ntawm cov kws tsim nyog vuam raws li kev saib xyuas engineering. Lub hom phiaj yog kom txo qis hydrogen, tswj lub voj voog thermal, thiab khaws cia cov hlau hnyav. Rau txhua daim ntawv thov kev tsim qauv, kev koom tes nrog tus kws ua haujlwm vuam thiab ua raws li cov txheej txheem tsim nyog tsis yog - sib tham txog kev nyab xeeb thiab kev ua haujlwm.
Cov tshuaj muaj pes tsawg leeg ntawm cov hlau S690QL1 (1.8988): EN 10025-6-2004
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Cu | Zr | B | CEV |
| max 0.2 hli | max 0.8 hli | max 1.7 Nws | max2 ua | max 0.02 Nws | max 0.01 Nws | max 1.5 hli | max 0.7 hli | max 0.12 | max 0.015 | max 0.06 | max 0.05 Nws | max 0.5 hli | max 0.15 Nws | max 0.005 Nws | max 0.83 Nws |
Mechanical zog ntawm steel S690QL1 (1.8988)
| Nominal thickness (hli): | 3 - 50 | 50 - 100 | 100 - 150 |
| Rm- Tensile zog (MPa) | 770-940 | 760-930 | 710-900 |
| Nominal thickness (hli): | 3 - 50 | 50 - 100 | 100 - 150 |
| ReH- Yam tsawg kawg nkaus tawm lub zog (MPa) | 690 | 650 | 630 |
| KV- Impact zog (J) longitud., | 0 degree 60 |
-20 degree 50 |
-40 degree 40 |
-60 degree 30 |
| A- Min. elongation Lo=5,65 √ Yog li (%) | 14 |
S690QL1 steel yog dab tsi?
S690QL1 yog qhov siab - lub zog quenched thiab tempered structural steel qib nrog qhov tsawg kawg nkaus lub zog ntawm 690 MPa, optimized rau txhim kho toughness ntawm qhov kub thiab txias (txog -60℃).
"QL1" txhais li cas hauv S690QL1?
"QL1" qhia txog qib -qib nrog cov kev cuam tshuam tshwj xeeb uas yuav tsum tau ua kom tawv nqaij ntawm -60 degree, kom ntseeg tau tias muaj kev tiv thaiv siab dua rau cov pob txha tawg hauv qhov chaw txias heev.
Dab tsi yog cov ntawv thov tseem ceeb ntawm S690QL1?
Nws yog siv rau hauv cov khoom tseem ceeb rau Arctic engineering, offshore platforms, cua turbine yees nyob rau hauv cov huab cua txias, thiab hnyav -cov khoom siv mining ua haujlwm qis dua -40 degree.
S690QL1 txawv ntawm S690QL li cas?
S690QL1 lav qhov cuam tshuam qhov hnyav ntawm qhov kub qis (-60 degree) piv rau S690QL (feem ntau -40 degree), ua rau nws haum rau cov mob khaub thuas hnyav dua.
Cov tshuaj muaj pes tsawg leeg ntawm S690QL1 yog dab tsi?
Nws muaj tsawg-carbon alloying ntsiab xws li manganese, silicon, npib tsib xee, chromium, molybdenum, thiab vanadium, nrog rau kev tswj nruj ntawm impurities los xyuas kom meej weldability thiab toughness.
Yuav ua li cas weld S690QL1 steel kom raug?
Vuam yuav tsum muaj tsawg-hydrogen electrodes, preheating (100{2}}150 degree), tswj cov cua sov input, thiab post-weld kev nyuaj siab nyem kom muaj zog thiab tiv thaiv hydrogen-induced cracking.
Puas yog S690QL1 corrosion resistant?
Tsis yog, S690QL1 tsis yog qhov muaj zog corrosion-resistant. Nws yuav tsum muaj cov txheej txheem tiv thaiv (piv txwv li, galvanizing lossis pleev xim) siv rau hauv qhov chaw corrosive.
Cov qauv twg siv rau S690QL1?
Nws tau txhais raws li European tus qauv EN 10025-6, nrog rau cov lus qhia ntxiv rau kev ntsuas qhov ntsuas kub qis thiab qib zoo.
S690QL1 puas tuaj yeem ua tau yooj yim?
Machining S690QL1 yog qhov nyuaj vim nws lub zog siab; nws yuav tsum muaj cov cuab yeej nruj, ua kom txias txaus, thiab ua kom zoo rau kev txiav kom tsis txhob hnav cov cuab yeej ntau dhau.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
