S890QL yog tus qauv European (EN 10025-}6) siab- lub zog cov qauv hlau, paub txog nws qhov tshwj xeeb yield zog (890 MPa), ua tiav los ntawm quenching thiab tempering ('Q'), thiab qhov kub tsis tshua muaj kev cuam tshuam toughness (lub 'L' signifies xeem ntawm -40). Nws yog siv rau hauv cov ntawv thov xws li cranes, txuas hniav, thiab kev thauj mus los hnyav, muab lub zog thiab kav ntev thaum seem weldable thiab formable, tso cai rau sib dua, muaj zog tsim.
Cov yam ntxwv tseem ceeb
S: Steel Qauv
890: Yam tsawg kawg nkaus lub zog ntawm 890 Megapascals (MPa)
Q: Quenched thiab Tempered (ib txheej txheem kev kho cua sov)
L: Tsawg kub cuam tshuam toughness (kuaj ntawm -40 degree)
Khoom & Daim Ntawv Thov
Siab zog: Ntau tshaj peb zaug muaj zog tshaj li cov qauv steel, zoo tagnrho rau kev thauj khoom -cov kabmob.
Weldability zoo: Txawm tias nws lub zog, nws yog ib qho yooj yim rau weld thiab fabricate.
Durable: Ua tau zoo nyob rau hauv cov xwm txheej hnyav vim nws qhov qis - qhov kub thiab txias tsis kam.
Daim ntawv thov: cranes, mobile platforms, txuas hniav, tsheb thauj mus los hnyav, nqa khoom, thiab cov thawv tshwj xeeb.
S890QL puas tuaj yeem txuas tau yooj yim?
Tsis yog, S890QL tsis tuaj yeem txuas tau yooj yim. Nws raug cais raws li cov khoom nyuaj heev rau vuam vim nws lub zog ultra- siab zog (890 MPa tawm los) thiab siab hardenability. Vuam yuav tsum nruj, txheej txheem- tsav tswj kom tsis txhob muaj qhov tsis xws luag thiab khaws cia cov hlau cov khoom siv kho tshuab. Yog tsis muaj kev ceev faj kom raug, kev pheej hmoo ntawm hydrogen-induced cracking (txias cracking), tshav kub- cuam tshuam cheeb tsam (HAZ) softening, thiab txo toughness yog siab.
Qhov tseem ceeb Vuam Requirement rau S890QL:
1. Pre-Weld Preparation
Kev Tsim Nyog Kev Tsim Nyog: Cov txheej txheem Vuam Specification (WPS) yuav tsum tsim nyog los ntawm kev sim (xws li, raws li EN ISO 15614-1) ua ntej tsim khoom.
Kev Tsim Kho & Kev Tu: Siv du, machined bevels. Tshem tawm tag nrho cov kab mob (xeb, roj, ya raws, xim) yam tsawg 30 hli ntawm qhov sib koom ua ke.
2. Filler Hlau Xaiv
Hom: Tsuas yog qis - hydrogen consumables yog txais:
SMAW (Manual Arc): Basic -coated electrodes (piv txwv li, kev faib tawm E 89 4 B 42 H5 per EN ISO 18275).
GMAW/FCAW (MIG/MAG/Flux-Cored): Hlau-cored los yog flux-cored xov hlau (piv txwv li, T 89 4 PM H5 per EN ISO 16834-A).
Strength Matching: Feem ntau undermatching muab tub lim hlau (nrog ~ 770-820 MPa yield) yog siv los txhim kho weld hlau toughness thiab txo cov tawg rhiab heev, tshwj tsis yog tias tus qauv tsim tshwj xeeb yuav tsum muaj zog sib xws.
3. Tseem ceeb Vuam Parameters
Preheat & Interpass Kub: Yuav tsum tau.
Hom Preheat: 150-200℃(siab dua rau cov seem tuab lossis cov pob qij txha txwv).
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 nruj tswj nyob rau hauv ib tug tsim nyog ntau yam (feem ntau 0.5-1.2 kJ / mm).
Tsawg dhau → txaus ntshai, nkig HAZ.
Siab dhau → HAZ ntau dhau softening thiab grain loj hlob.
Cov txheej txheem: Siv cov hlua khi hlua khi los yog nqaim weave. Tsis txhob ntev arcs. Xyuas kom zoo sidewall fusion.
4. Tshaj tawm -Kev kho Weld
Post-Weld Heat Treatment (PWHT): Often required, especially for thicknesses >30 mm los yog nruj heev pob qij txha. Kev xyaum ua ntau yog kev ntxhov siab ntawm 550-600℃kom txo qis kev ntxhov siab thiab npau taws HAZ.
Slow Cooling: Insulate lub vuam tom qab vuam kom tso cai maj mam txias mus rau qhov kub thiab txias.
5. Kev Tshawb Fawb & Kev Xeem
Tsis yog-Kev Ntsuas Kev Puas Tsuaj (NDT): Ultrasonic (UT) lossis kev ntsuas sib nqus (MT) feem ntau yuav tsum tau ua rau qhov tseem ceeb welds.
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: Tej zaum yuav xav tau ntawm -40℃kom tsim nyog cov txheej txheem.
Tseem ceeb Risks yog Welded tsis raug:
Hydrogen Cracking:Vim siab hardness thiab residual stress.
HAZ Softening:Poob lub zog nyob rau hauv tshav kub- cuam tshuam cheeb tsam.
Toughness Degradation:Weld lossis HAZ yuav tsis ua raws li qhov yuav tsum tau muaj qhov kub thiab txias.
Technical data
TS EN 10025-6 S890QL quenched thiab tempered steel phaj Cov tshuaj muaj pes tsawg leeg
| Qib | C % | Si% | Mn% | P % | S % | N % | B % | Cr% |
| S890 qw | 0.200 | 0.800 | 1.700 | 0.020 | 0.010 | 0.015 | 0.005 | 1.500 |
| Cu% | Mo% | Nb% | Ni% | Ti % | V % | Zr% | ||
| 0.500 | 0.700 | 0.060 | 2.000 | 0.050 | 0.120 | 0.150 |
EN10025-6 S890QL quenched thiab tempered steel phaj txhua yam khoom
| Qib | Thickness (hli) | Tsawg-yield (Mpa) | Tensile (MPa) | Elongation (%) | Min Impact Zog | |
| S890 qw | 8mm-50mm | Min 890 Mpa | 940-1100 Mpa | 11% | -40 | Min 30 J |
| 51mm-100 hli | Min 830 Mpa | 880-1100 Mpa | 11% | -40 | Min 30 J | |
| 101mm-150mm | Min 800 Mpa | 820-1000Mpa | 11% | -40 | Min 30 J |
Yog xav paub ntxiv nyob rau hauv EN10025-6 S890QL quenched thiab tempered steel phaj zoo daim ntawv pov thawj los yog nug nyob rau hauv kev sib tw official hais, thov hu rau peb.
1. S890QL steel yog dab tsi?
S890QL yog qhov siab heev - lub zog quenched thiab tempered structural steel nrog qhov tsawg kawg nkaus yield zog ntawm 890 MPa, tsim los tuav zoo toughness ntawm qis kub mus rau -40℃.
2. Cov ntawv thov tseem ceeb ntawm S890QL yog dab tsi?
Nws yog siv nyob rau hauv ultra-hnyav mobile crane booms, advanced mining laum rigs, tub rog tsheb thav duab, thiab tshwj xeeb offshore Cheebtsam uas siab tshaj plaws lub zog - rau - luj piv yog ib qho tseem ceeb nyob rau hauv cov huab cua txias.
3. S890QL txawv ntawm S690QL li cas?
S890QL muaj lub zog tawm los ntau dua (890 MPa vs . 690 MPa) tab sis qis dua toughness thiab weldability, ua rau nws haum rau qhov hnyav dua - tseem ceeb heev tsis tau xav tau ntau daim ntawv thov.
4. Cov tshuaj muaj pes tsawg leeg ntawm S890QL yog dab tsi?
Nws muaj cov pa roj carbon tsawg, manganese, silicon, thiab micro- alloys xws li niobium, vanadium, thiab boron, nrog rau npib tsib xee, chromium, thiab molybdenum rau hardenability thiab toughness.
5. S890QL puas tuaj yeem welded yooj yim?
Tsis yog, vuam S890QL yog qhov nyuaj thiab yuav tsum tau ua cov txheej txheem nruj: qis- cov khoom siv hydrogen, preheating (feem ntau 150-}200 degree), tswj cov cua sov, thiab feem ntau tom qab vuam cua sov kho.
6. Cov qauv twg siv rau S890QL steel?
Nws feem ntau yog tswj hwm los ntawm European tus qauv EN 10025-6 rau quenched thiab tempered high-strength qauv steels.
7. Puas yog S890QL corrosion resistant?
Tsis yog, S890QL tsis yog corrosion{1}}tiv taus thiab yuav tsum muaj cov txheej txheem tiv thaiv xws li pleev xim, galvanizing, los yog tshwj xeeb plating rau siv nyob rau hauv corrosive ib puag ncig.
8. Yuav ua li cas tshuab S890QL steel?
Machining S890QL yog qhov nyuaj vim nws qhov siab hardness; nws yuav tsum tau siv cov cuab yeej carbide muaj zog, kev txiav qeeb qeeb, siab - siab txias txias, thiab kev teeb tsa nruj.
9. Tus nqi ntawm S890QL steel phaj yog dab tsi?
S890QL tseem kim dua li qis dua -qib steels, nrog cov nqi sib txawv raws li tuab, ntau, thiab ntawv pov thawj, feem ntau yog li ntawm € 2,500 txog €4,500+ ib tuj.
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.
