QSTE 420 TMyog ib qho thermomechanically dov micro-alloyed steel nrog ib tug guaranteed yam tsawg kawg nkaus yield zog ntawm 420 MPa. Nws yog qhov txias - ua haujlwm ua haujlwm ntawm automotive structural steel tsev neeg - teev rau lub cev -hauv -dawb, chassis beams, thiab cov khoom muaj kev nyab xeeb uas lub zog siab yuav tsum tau ua nrog zoo formability thiab weldability. Ntawm no yog qib kawm tiav cov txheej txheem, nrog rau cov ntaub ntawv pov thawj thiab kev qhia ua haujlwm.
Ntsiab Cai
- Yield zog Ntau tshaj los yog sib npaug rau 420 MPa, tensile 480-620 MPa.Cov no yog cov raws li -xa (thermomechanically dov) qhov tseem ceeb ntawm SEW092 / EN 10149-2. Tsis xav tau kev kho cua sov tom ntej.
- Sib npaug rau S420MC (EN 10149-2), cov ntaub ntawv naj npawb 1.0980.Kuj sib raug rau NFA E420D, UNI FeE420TM, ASTM 060XLK, thiab Suav HR420F (GB/T 20887).
- Micro-Alloying nrog Nb, V, Timuab cov nplej refinement thiab nag lossis daus ntxiv zog yam tsis muaj kev cuam tshuam weldability.
- Cov kev siv automotive:lub cev ntas, qhov rooj kab teeb, lub ru tsev rails, chassis beams, ncua kev kawm ntawv, thiab kev sib tsoo zog- nqus cov qauv.
- Muaj thickness ntau:feem ntau 1.2–16 mm (kub-rolled pickled coil/daim ntawv). Dav mus txog ~ 1,600 mm.
- Zoo weldabilitynrog tus qauv MIG / MAG thiab qhov chaw vuam tsis kam. Tsawg cua sov input thiab tswj kev sib tshuam kub (tsawg dua lossis sib npaug li 200 degree) pom zoo.
1. QSTE420TM yog dab tsi thiab nws nyob qhov twg hauv tsev neeg hlau
QSTE420TM belongs rau tsev neeg ntawm cov thermomechanically dov zoo -cov nplej hlau tsim los rau kev sib sau txias. Lub npe lov raws li:Q= quench/zoo,St= steel,E= Yam tsawg kawg nkaus tawm lub zog (420 MPa),TM= thermomechanically dov. Nws pib los ntawm German SEW092 specification, txawm hais tias nws yog tam sim no dav siv raws li Q/BQB 310 (Baosteel enterprise txuj) thiab hla- hais txog EN 10149-2 S420MC.
Tsis zoo li quenched-thiab- tempered steels, TM steels ua tiav lawv cov khoom los ntawm kev tswj dov thiab micro-alloy nag lossis daus thaum txias. Cov qauv nplej zoo (feem ntau ASTM 10-12) muab kev sib xyaw ua ke zoo nkauj: lub zog siab txaus los txo qis ntu tuab thiab lub tsheb hnyav, tab sis ductility thiab formability zoo txaus rau stamping, dabtsi yog khoov, thiab kos duab automotive complex.
2. Tshuaj muaj pes tsawg leeg
| Element | QSTE420TM (SEW092/Q/BQB 310) | S420MC (EN 10149-2) | Lus hais |
|---|---|---|---|
| C, max | 0.12 | 0.12 | Tsawg carbon rau weldability |
| Si, max | 0.50 | 0.50 | Deoxidizer; tshaj ua phem rau saum npoo zoo |
| Mn, mas | 1.60 | 1.60 | Khoom-kev daws teeb meem |
| P, max | 0.030 | 0.025 | impurity; EN txwv yog nruj dua |
| S, max | 0.025 | 0.015 | impurity; cuam tshuam rau formability |
| Al, min | 0.015 | 0.015 | Grain refiner & deoxidizer |
| Nb, max | 0.09 | 0.09 | Grain refinement & nag xob nag cua ntxiv dag zog |
| V, max | 0.20 | 0.20 | Ua kom dej nag ntxiv |
| Ti, max | 0.15 | 0.15 | Grain refinement ntawm TiN/TiC precipitates |
Source: SEW092, Q/BQB 310-2009, EN 10149-2:2013. Cov ntsiab lus micro-alloy Nb, V, thiab Ti tuaj yeem muab ntxiv rau tus kheej lossis ua ke. "max" qhov tseem ceeb yog ib qho maxima; "min" qhov tseem ceeb yog ib qho minima.
Lub micro-alloying philosophy qab QSTE420TM yog tsim nyog nkag siab: niobium (Nb) pins austenite grain ciam teb thaum kub dov, ua ib tug zoo kawg grain loj. Vanadium (V) thiab titanium (Ti) tsim cov carbide / nitride precipitates thaum lub sij hawm txias uas ua rau kom muaj zog los ntawm dispersion hardening. Vim tias cov pa roj carbon khaws cia qis dua 0.12%, qhov sib npaug ntawm cov pa roj carbon sib npaug (CEV) nyob qis txaus rau qhov zoo weldability yam tsis muaj preheat hauv cov tuab tuab.
3. Mechanical Properties
| Khoom | Tus nqi | Qhov xwm txheej |
|---|---|---|
| Yield zog ReH, min | 420 MPa rau | Tag nrho cov thicknesses, transverse |
| Tensile zog Rm | 480-620 MPa | Tag nrho cov thicknesses, transverse |
| Elongation A80, min | 16% | Thickness <3.0 hli |
| Elongation A5, min | 19%(qhov chaw- nyob ntawm: mus txog 21%) | Thickness Ntau dua los yog sib npaug li 3.0 hli |
Kev tawm los-rau- qhov sib piv tensile ntawm kwv yees li 0.68–0.88 txhais tau tias QSTE420TM muaj txiaj ntsig ua haujlwm- muaj peev xwm ua kom muaj zog tom qab tawm los - tseem ceeb rau kev nqus lub zog hauv cov xwm txheej sib tsoo. Qhov tsawg kawg nkaus elongation ntawm 16-19% paub meej tias tsim nyog ductility rau txias dabtsi yog khoov thiab nruab nrab stretch forming.
4. Cov qhab nia sib npaug thoob cov qauv
| Txuj | Qib Qib | Khoom Naj Npawb |
|---|---|---|
| SEW092 (Lub teb chaws Yelemees) | QSTE420TM | 1.0980 |
| TS EN 10149-2 (Tebchaws Europe) | S420 MC | 1.0980 |
| Q/BQB 310-2009 (Baosteel) | QSTE420TM | - |
| NFA 36-231 (Fabkis) | E420D | - |
| UNI 8890 (Tebchaws Asmeskas) | FeE420 TM | - |
| ASTM (USA) | 0 60 txl | - |
| BS 1449 (UK) | HR 50 F45 | - |
| GB/T 20887.1-2007 (Tuam Tshoj) | HWM 420 F | - |
Hla -reference compiled los ntawm SEW092, EN 10149-2, thiab steel xa khoom cov ntaub ntawv qhia kev. Lus Cim: GB / T 20887 HR420F yuav muaj qhov sib txawv me ntsis. Rau cov ntawv sau npe / chassis tshwj xeeb, xa mus rau GB / T 3273 qib 420L raws li qib sib xws tab sis tsis zoo ib yam.
5. Automotive daim ntawv thov
| Daim ntawv thov cheeb tsam | Cov Cheebtsam tshwj xeeb | Vim li cas QSTE420TM |
|---|---|---|
| Lub cev-hauv-dawb | Lub cev ntas, qhov rooj cuam tshuam kab teeb, ru tsev rails, hood sab hauv panels | Siab zog-rau- hnyav piv; txias-formable rau hauv cov duab complex |
| Cov qauv kev nyab xeeb | B-cov ncej txhawb nqa, sab cuam tshuam kab teeb, kab teeb kab | Predictable zog nqus; ua haujlwm zoo- tawv tom qab tawm los |
| Chassis & ncua kev kawm ntawv | Chassis beams, crossmembers, suspension arms, subframes | Kev qaug zog; weldable rau lwm qib HSLA |
| Load-cov kabmob | Truck ncej rails, trailer kab teeb, structural brackets | 420 MPa yield tso cai rau ntu txo qis piv rau cov hlau me me |
Daim ntawv teev npe raws li qhib - cov ntaub ntawv mills thiab kev coj ua kev lag luam tsheb.
6. Kev Ua Haujlwm Ua Haujlwm - Kauj Ruam
6.1 Kev Npaj Khoom Siv
Tshawb xyuas cov xaim xaim lossis daim ntawv tawm tsam daim ntawv pov thawj zeb xeem (MTC): paub meej qib (QSTE420TM lossis S420MC), tus lej kub, tshuaj lom neeg muaj pes tsawg leeg hauv spec, thiab cov khoom siv kho tshuab. Txheeb xyuas qhov chaw rau nplai, pickling zoo, thiab qhov ntev ntev (thickness, dav, flatness). Rau pickled thiab oiled (P&O) cov ntaub ntawv, xyuas cov roj zaj duab xis yog zoo los tiv thaiv kev xeb xeb.
6.2 Txiav
QSTE420TM can be cut by shearing (guillotine) for straight-line cuts, laser cutting for complex profiles, or plasma cutting for thicker gauges (>6 mm). Laser txiav yog nyiam rau cov khoom tsim vim qhov nqaim tshav kub- cuam tshuam cheeb tsam (HAZ) txo qis ntug tawv. Yog tias cov plasma txiav yog siv rau cov thicknesses siab tshaj 8 hli, zom cov ntug txiav kom tshem tawm cov nitride-txheej txheej ua ntej txias txias.
6.3 Txias tsim
Qhov no yog qhov QSTE420TM khwv tau nws lub npe. Qhov zoo -grained microstructure tso cai:
- Khoov:Yam tsawg kawg khoov vojvoog ntawm ~ 1.0–1.5t (qhov twg t=ntawv tuab) rau 90℃khoov transverse mus rau dov kev taw qhia. Khoov thaum uas tig mus rau dov kev taw qhia yuav xav tau ib lub vojvoog loj me me (1.5–2.0t).
- Stamping / sib sib zog nqus kos duab:Haum rau nruab nrab kos qhov tob. Rau kev sib sib zog nqus nqus, xav txog ob - xovxwm ua haujlwm thiab lub zog blanker txaus los tiv thaiv wrinkling. Cov khoom siv n-tus nqi (ua haujlwm- hardening exponent) feem ntau nyob ib ncig ntawm 0.13–0.15.
- Stretch forming:Kev ua tau zoo nyob rau hauv qhov txwv elongation. Springback tau hais ntau dua nrog cov hlau me me - them nyiaj tuag geometry raws li.
- Roll forming:Zoo heev. Lub cev elongation thiab zoo ib yam tawm los ntawm lub kauj mus rau kauj ua QSTE420TM zoo- haum rau yob- tsim cov tswv cuab longitudinal.
6.4 Vuam
QSTE420TM yog yooj yim weldable. Cov kev coj ua uas pom zoo:
- MIG/MAG (GMAW):ER70S-6 los yog sib npaug muab tub lim. CO&sub2; los yog Ar/CO&sub2; mixed shielding gas. Khaws cov cua kub hauv qab ~ 1.5 kJ / mm.
- Resistance chaw welding:Standard parameters rau HSLA steel ntawm sib npaug thickness. Electrode quab yuam thiab vuam lub sij hawm yuav tsum tau hloov me ntsis los ntawm me ntsis steel nqis.
- Interpass kub:Tsis txhob siab tshaj 200 degree. Cov cua kub ntau dhau coarsens cov nplej hauv HAZ thiab tuaj yeem degrade ob lub zog thiab toughness.
- Tsis xav tau preheatrau thicknesses hauv qab no ~ 10 hli ntawm ambient kub.
6.5 Kev Kho Hniav
Tom qab tsim thiab vuam, cov khoom yuav tau txais:
- Degreasing thiab phosphating:Standard automotive pretreatment ua ntej e-coat / painting.
- E- txheej (cathodic electrodeposition):Kev tiv thaiv corrosion tseem ceeb rau lub cev - hauv - cov khoom dawb.
- Hmoov txheej los yog ntub pleev xim:Rau chassis thiab pom cov khoom siv.
- Kub-dip galvanizing:Ua tau tab sis nco ntsoov tias Si cov ntsiab lus (0.50 max) tau txais; Si ntau dhau tuaj yeem ua rau tuab, nkig zinc txheej.
6.6 Kev sib dhos thiab kev tshuaj xyuas
Sib sau ua ke thiab welded Cheebtsam los ntawm bolting, riveting, los yog ntxiv welding. Ua qhov kev soj ntsuam qhov ntev tiv thaiv kev tswj xyuas.
Cov kev kuaj xyuas tseem ceeb: weld kev ncaj ncees (visual + periodic macro-section), dimensional conformance (CMM lossis gauge), deg tiav (tsis muaj kab nrib pleb, tsis muaj qhov ntsuas ntau dhau). Rau kev nyab xeeb- qhov tseem ceeb, xyuas cov khoom siv kho tshuab ntawm daim ntawv pov thawj pov thawj ua tiav nrog cov khoom tsim tawm.
7. Ordering QSTE420TM - Yuav Qhia Li Cas
Thaum koj xa RFQ rau QSTE420TM, suav nrog cov khoom no kom tsis txhob muaj qhov tsis meej:
- Qib thiab tus qauv:"QSTE420TM per SEW092" lossis "S420MC per EN 10149-2"
- Qhov Loj:Thickness × dav × ntev (mm), los yog kauj ID / OD thiab coil hnyav ntau yam
- Deg mob:Kub- dov pickled thiab oiled (P&O), los yog raws li - dov (yog hais tias descaling yuav ua downstream)
- Ntug mob:Mill edge los yog trimmed/slit edge
- Ntim:Tonnes los yog pes tsawg daim ntawv / coils
- Daim ntawv thov:Pab lub zeb optimize micro-alloying nyob rau hauv lub qhov rais specification
- Ntawv pov thawj:EN 10204 3.1 (tus qauv MTC) lossis 3.2 (nrog rau thib peb- kev tshuaj xyuas tog)
Cov lus nug nquag
Qhov txawv ntawm QSTE420TM thiab S420MC yog dab tsi?
QSTE420TM (SEW092) thiab S420MC (EN 10149-2) yog qib sib npaug. Ob leeg yog thermomechanically dov micro-alloyed steels nrog qhov tsawg kawg nkaus lub zog ntawm 420 MPa thiab tensile zog ntawm 480-620 MPa. QSTE420TM originates los ntawm German SEW092 specification; S420MC yog European EN tsim. Cov khoom siv naj npawb 1.0980 siv rau ob qho tib si. Cov tshuaj muaj pes tsawg leeg txwv thiab txhua yam khoom yog qhov tseem ceeb zoo ib yam.
QSTE420TM puas tuaj yeem welded siv cov txheej txheem arc vuam?
Yog lawm. QSTE420TM muaj qhov zoo weldability nrog ntau txoj hauv kev suav nrog MIG / MAG (GMAW), TIG (GTAW), thiab qhov chaw vuam tsis kam. Vim tias nws yog micro-alloyed nplua- cov hlau tsis muaj cua sov, cov khoom siv hluav taws xob tsawg thiab tswj kev sib cuam tshuam kub (feem ntau qis dua 200 degree) raug pom zoo kom khaws cov nplua -grained microstructure nyob rau hauv tshav kub- thaj tsam cuam tshuam. Preheating feem ntau tsis tas yuav tsum tau rau cov tuab hauv qab 10 hli.
Dab tsi yog cov kev siv tsheb loj ntawm QSTE420TM?
QSTE420TM yog siv rau kev tsim kho thiab kev nyab xeeb- cov khoom tseem ceeb hauv tsheb: lub cev thav duab, qhov rooj cuam tshuam kab teeb, lub ru tsev rails, hood structures, chassis beams, ncua kev kawm ntawv, crossmembers, thiab kev sib tsoo zog - absorbing qhov chaw. Nws qhov sib xyaw ua ke ntawm lub zog muaj zog (Ntau dua lossis sib npaug ntawm 420 MPa) thiab kev ua kom txias txias ua rau nws haum rau qhov hnyav -kev tsim kho kom zoo uas yuav tsum ua raws li cov qauv kev nyab xeeb.
QSTE420TM puas xav tau kev kho cua sov tom qab tsim?
Feem ntau tsis muaj. QSTE420TM yog tsim los rau kev ua kom txias nyob rau hauv raws li - xa (thermomechanically dov) mob. Nws ua tiav nws cov khoom siv kho tshuab los ntawm kev tswj dov thiab micro-alloy nag lossis daus es tsis yog los ntawm kev kho cua sov tom ntej. Txawm li cas los xij, yog tias qhov kev ua haujlwm ua haujlwm qhia txog kev ua haujlwm txias dhau los lossis yog tias vuam tau ua tiav, kev ntxhov siab - nyem annealing tuaj yeem siv rau qhov kub qis dua 580℃kom tsis txhob cuam tshuam rau cov khoom siv kho tshuab.
Cov qauv Suav dab tsi npog QSTE420TM qib sib npaug?
QSTE420TM yog siv nyob rau hauv Baosteel's Q/BQB 310-2009 tus qauv (kho tsis tu ncua-cov ntawv hlau dov thiab sawb rau kev siv tsheb siv). Hauv Suav teb tus qauv txheej txheem, GB / T 20887.1-2007 npog HR420F raws li qib sib npaug rau kub- dov siab- lub zog steel ntawv rau txias txoj hauv kev siv tsheb. GB / T 3273 npog kub-kuav los tiag steel daim hlau rau tsheb thav duab, qhov twg cov qib siab zog zoo li 420L tuaj yeem thov rau cov ntawv thov.
Cov ntaub ntawv
- SEW092 - Kub-Rolled Khoom ntawm Weldable Fine Grain Steels rau Cold Forming (thawj German specification rau QSTE420TM).
- TS EN 10149-2: 2013 - Cov Khoom Kub Rolled Flat Ua los ntawm Cov Khoom Uas Muaj Zog Muaj Zog rau Cov Txias Txias. Ntu 2: Kev xa khoom rau Thermomechanically Rolled Steels.
- Q/BQB 310-2009 - Baosteel Enterprise Standard: Nruam Kub- Rolled Steel Sheet thiab Sawb rau Automotive Structural Siv.
- ThyssenKrupp Steel Europe - HSM 420 / S420MC Cov Ntaub Ntawv Khoom (Precision Steel).
- ESB Group - S420MC Micro-Alloyed Kub-Rolled Steel rau Cold Forming.
- Gnee Steel (Tianjin) Co., Ltd. - Lub tuam txhab thiab cov ntaub ntawv khoom.
Tag nrho cov ntaub ntawv tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab yeej cuab tam saum toj no tau raug txheeb xyuas raws li cov peev txheej thiab cov qauv raws li lub Yim Hli 2026. Cov txheej txheem ua haujlwm sawv cev rau kev coj ua zoo tshaj plaws hauv kev lag luam thiab tej zaum yuav txawv ntawm cov cuab yeej tshwj xeeb thiab ib feem geometry.
Xav tau QSTE420TM / S420MC hauv Coil lossis Txiav -rau -Length Sheet?
Xa koj spec: qib, thickness, dav, kom muaj nuj nqis, thiab lo lus uas peb. Peb xa rov qab cov lus hais hauv 24 teev.
Xa Lus Nug / Tau Txais Cov Lus Qhia
Los yog email info@gneesteels.com · WhatsApp +86 15824687445
Kev lees paub: Cov kab lus no yog muab rau cov ntaub ntawv qhia dav dav nkaus xwb thiab tsis yog engineering lossis kev qhia txog kev yuav khoom. Tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab tam muaj nuj nqis yog kos los ntawm cov qauv luam tawm thiab cov ntaub ntawv xa khoom xa tuaj thaum lub Yim Hli 2026. Ib txwm txheeb xyuas qhov ua tau raws li cov lus qhia siv tau los ntawm daim ntawv pov thawj zeb xeem (EN 10204 3.1 lossis 3.2) rau koj qhov kev txiav txim tshwj xeeb. Gnee Steel (Tianjin) Co., Ltd. ua tsis muaj kev sawv cev txog qhov raug ntawm thib peb -peb cov ntaub ntawv. Kev ua tsis tau yog cov lus qhia dav dav; paub meej nrog koj pab neeg tsim khoom engineering rau cov khoom tshwj xeeb thiab cov cuab yeej.
