Qste380TM, Qste420TM, Qste460TM, thiab Qste500TM steel phajyog tag nrho cov siab -lub zog qis- alloy (HSLA) kub- dov steel qib tsim los rau txias- tsim cov khoom siv hauv tsheb, ua raws li German- cov qauv ntsig txog thiab dav siv hauv kev tsim tsheb thoob ntiaj teb. Lawv qhia tib cov yam ntxwv tseem ceeb-thermo-mechanically dov (TM txheej txheem), zoo heev txias formability, thiab weldability-tab sis txawv feem ntau nyob rau hauv lawv yield zog (xws li ntawm 380 MPa rau 500 MPa). Raws li qib qib nce, qhov tawm los thiab lub zog tensile maj mam nce, thaum ductility thiab formability me ntsis txo. Qhov gradient ntawm kev ua tau zoo no ua rau txhua qib tsim nyog rau qhov sib txawv ntawm cov khoom siv hauv tsheb, los ntawm cov khoom tsis yog-load-cov kabmob (Qste380TM) mus rau siab -load core structural qhov chaw (Qste500TM).
Tag nrho plaub qib yog QsteTM series, qhov "Q" sawv cev rau qhov zoo txias formability, "St" qhia lub zog, "E" ua raws li cov lej qhia qhov tsawg kawg nkaus tawm lub zog (hauv MPa), thiab "TM" sawv cev rau thermo- kev ua tshuab (tswj dov thiab txias). Qhov kev ua haujlwm no ua kom muaj qhov zoo -grained microstructure, ntsuas lub zog thiab formability- tseem ceeb rau cov khoom siv tsheb uas yuav tsum tau muaj ob qho tib si thauj khoom-cov kabmob muaj peev xwm thiab kev ua kom txias txias. Tsis zoo li cov qauv hlau zoo tib yam, lawv tau tsim rau kev siv tsheb, nrog kev tswj nruj ntawm cov tshuaj lom neeg muaj pes tsawg leeg thiab impurities kom ua tau raws li cov qauv siab ntawm kev nyab xeeb tsheb thiab kav ntev.
1.Chemical Composition Comparison (Kev Ntsuas Kub, Tsawg dua lossis sib npaug li %)
Cov tshuaj muaj pes tsawg leeg ntawm plaub qib yog ua kom zoo rau lawv cov qib zog, nrog rau kev hloov me me hauv manganese cov ntsiab lus thiab microalloy ntxiv rau qhov sib npaug ntawm lub zog thiab kev tsim. Tag nrho cov txiaj ntsig ua raws li cov qauv tsim nyog (saib Q / BQB thiab EN 10149-2):
|
Element |
Ntsiab Function |
||||
|---|---|---|---|---|---|
|
Cov pa roj carbon (C) |
Tsawg dua lossis sib npaug li 0.12 |
Tsawg dua lossis sib npaug li 0.12 |
Tsawg dua lossis sib npaug li 0.12 |
Tsawg dua lossis sib npaug li 0.12 |
Tswj kom tswj tau weldability thiab formability |
|
Silicon (Si) |
Tsawg dua los yog sib npaug li 0.50 |
Tsawg dua los yog sib npaug li 0.50 |
Tsawg dua los yog sib npaug li 0.50 |
Tsawg dua los yog sib npaug li 0.50 |
Pab deoxidation thaum lub sij hawm steelmaking, txhim kho nto zoo |
|
Manganese (Mn) |
Tsawg dua lossis sib npaug li 1.40 |
Tsawg dua lossis sib npaug li 1.60 |
Tsawg dua lossis sib npaug li 1.60 |
Tsawg dua lossis sib npaug li 1.70 |
Txhim khu lub zog thiab toughness; cov ntsiab lus nce nrog qib |
|
Phosphorus (P) |
Tsawg dua lossis sib npaug li 0.030 |
Tsawg dua lossis sib npaug li 0.025 |
Tsawg dua lossis sib npaug li 0.025 |
Tsawg dua lossis sib npaug li 0.025 |
Tsawg kom tsis txhob tawg tawg, nruj dua rau qib siab dua |
|
Sulfur (S) |
Tsawg dua lossis sib npaug li 0.025 |
Tsawg dua lossis sib npaug li 0.015 |
Tsawg dua lossis sib npaug li 0.015 |
Tsawg dua lossis sib npaug li 0.015 |
Tswj los txhim kho ductility thiab weldability |
|
Aluminium (Als) |
Ntau dua lossis sib npaug rau 0.015 |
Ntau dua lossis sib npaug rau 0.015 |
Ntau dua lossis sib npaug rau 0.015 |
Ntau dua lossis sib npaug rau 0.015 |
Refines grain qauv, txhim kho toughness |
|
Microalloys (Nb + Ti + V) |
Tsawg dua lossis sib npaug li 0.22 |
Tsawg dua lossis sib npaug li 0.22 |
Tsawg dua lossis sib npaug li 0.22 |
Tsawg dua lossis sib npaug li 0.22 |
Optimizes lub zog thiab formability; xaiv los ntawm tus neeg muag khoom |
2.Mechanical Properties Comparison
Mechanical properties are the core differentiator of the four grades, with yield strength increasing by 40 MPa per grade (380→420→460→500 MPa). Tensile strength also increases accordingly, while elongation decreases slightly-reflecting the trade-off between strength and ductility. All values are for longitudinal samples, thickness 1.5~12.0mm (adjustments apply for thickness >8mm):
|
Mechanical Indicator |
Qste 380 TM |
Qste 420 TM |
Qste 460 TM |
Qste 500 TM |
Nco tseg |
|---|---|---|---|---|---|
|
Yam tsawg kawg nkaus tawm lub zog (ReH / Rp0.2, MPa) |
Ntau dua lossis sib npaug rau 380 |
Ntau dua lossis sib npaug rau 420 |
Ntau dua lossis sib npaug rau 460 |
Ntau dua lossis sib npaug li 500 |
Decreases by 20 MPa for thickness >8mm ib |
|
Tensile zog (Rm, MPa) |
450~590 |
480~620 |
520~670 |
550~700 |
Ntau yam nthuav nrog nce qib |
|
Elongation (A80, %) - Thickness<3.0mm |
Ntau dua lossis sib npaug li 18 |
Ntau dua lossis sib npaug li 16 |
Ntau dua lossis sib npaug li 14 |
Ntau dua lossis sib npaug li 12 |
Ductility txo qis nrog nce zog |
|
Elongation (A80, %) - Thickness Ntau dua lossis sib npaug li 3.0mm |
Ntau dua lossis sib npaug 23 |
Ntau dua lossis sib npaug li 21 |
Ntau dua lossis sib npaug rau 19 |
Ntau dua lossis sib npaug li 17 |
Thicker nplooj ntawv muaj ntau dua elongation |
|
180℃Txias Khoov Test |
d=0.5a (tsis muaj kab nrib pleb) |
d=0.5a (tsis muaj kab nrib pleb) |
d=0.5a (tsis muaj kab nrib pleb) |
d=1a (tsis muaj kab nrib pleb) |
Qste500TM xav tau lub vojvoog khoov loj dua vim muaj zog dua |
|
Lub zog cuam tshuam (0 degree, J) |
Ntau dua lossis sib npaug 27 |
Ntau dua lossis sib npaug 27 |
Ntau dua lossis sib npaug 27 |
Ntau dua lossis sib npaug 27 |
Ua kom muaj zog nyob rau hauv qis - qhov kub thiab txias ib puag ncig |
3.Kev sib piv kev ua haujlwm
Kev ua tau zoo (formability, weldability, machinability) yog ze ze rau cov khoom siv kho tshuab, nrog qhov sib txawv me ntsis ntawm plaub qib - feem ntau cuam tshuam rau qhov nyuaj ntawm kev sib sau txias thiab vuam txheej txheem:
|
Kev ua tau zoo |
Qste 380 TM |
Qste 420 TM |
Qste 460 TM |
Qste 500 TM |
|---|---|---|---|---|
|
Txias Formability |
Zoo heev: Haum rau txoj kev stamping, khoov, thiab yob txoj kev; tsis muaj cracking txawm rau me me khoov radii |
Zoo heev: Haum rau feem ntau ntawm cov khoom siv hauv tsheb tsim; me ntsis kev txwv ntawm kev khoov heev |
Zoo: Haum rau nruab nrab - sib sau ua ke; xav tau cov txheej txheem kom raug kom tsis txhob tawg |
Ncaj Ncees: Haum rau kev yooj yim mus rau nruab nrab txoj kev; loj khoov vojvoog yuav tsum tau; tsis pom zoo rau qhov kub stamping |
|
Weldability |
Zoo heev: Tsis muaj preheating yuav tsum tau thickness tsawg dua los yog sib npaug rau 35mm; ruaj khov weld zog, tsis muaj ncej-weld cua sov yuav tsum tau |
Zoo heev: Ib yam li Qste380TM; haum rau tag nrho cov txheej txheem automotive vuam |
Very Good: Weld strength matches base metal; slight preheating recommended for thickness >12 hli |
Good: Preheating (80~150℃) recommended for thickness >10 hli; nruj tswj ntawm vuam tsis txwv kom txhob brittleness |
|
Machineability |
Zoo heev: Yooj yim rau txiav, xyaum, thiab xuas nrig ntaus; cov cuab yeej qis hnav |
Zoo heev: Ib yam li Qste380TM; haum rau siab - efficiency machining |
Zoo heev: me ntsis hardness; xav tau cov cuab yeej ntse thiab cov kev txiav tsim nyog |
Zoo: siab hardness; cov cuab yeej hnav nce me ntsis; xav tau optimized machining parameter |
4. Daim ntawv thov sib piv
Qhov kev ua tau zoo gradient ntawm plaub qib ncaj qha txiav txim siab txog lawv daim ntawv thov kev lag luam hauv kev tsim tsheb, nrog cov qib siab dua siv rau siab dua -load cov khoom siv. Lawv tag nrho cov dav siv nyob rau hauv tsheb thav duab, chassis, thiab lwm yam structural qhov chaw, nyob rau hauv txoj kab nrog rau cov kev xav tau ntawm siab - lub zog tsheb structural steel:
3.1 Qste380TM Steel Phaj
Lub zog qis tshaj plaws ntawm plaub, nrog rau qhov zoo tshaj plaws formability thiab weldability- haum rau tsis yog-load-cov kabmob lossis qis- thauj cov khoom siv tsheb thauj mus los: Automotive structural qhov chaw: Qhov rooj sab hauv vaj huam sib luag, ru tsev vaj huam sib luag, pem teb vaj huam sib luag, thiab lub rooj zaum thav duab.Non{6} inner bearing. cov vaj huam sib luag, lub taub hau lub taub hau sab hauv vaj huam sib luag, thiab lub hood inner panels.Auxiliary structural parts: Bracket support, reinforcement plates, and me me connecting components.
3.2 Qste420TM Steel Phaj
Sib npaug lub zog thiab formability- qib siv dav tshaj plaws nyob rau hauv plaub, haum rau nruab nrab- thauj cov khoom siv tsheb thauj mus los: Cov khoom siv tsheb chassis: Chassis crossbeams, longitudinal beams (lub teeb rau nruab nrab - tsheb thauj khoom), thiab ncua kev kawm ntawv lub cev.4} cov khoom siv lub cev: - qauv B-Pillars (reinforcement), thiab pem hauv ntej / rear bumpers (reinforcement). Nruab nrab- load Cheebtsam: Tsheb cab thav duab, log tsev reinforcements, thiab roj tank brackets. Nws tuaj yeem txo lub tsheb hnyav los ntawm 10-15% thaum tuav lub peev xwm thauj khoom hauv kev siv tshuab engineering.
3.3 Qste460TM Hlau Phaj
Lub zog muaj zog, zoo formability- haum rau siab- thauj cov khoom siv tsheb thauj khoom uas xav tau ob qho tib si lub zog thiab kev tsim: Hnyav-cov khoom siv tsheb thauj khoom hnyav: Cov tsheb thauj khoom hnyav chassis longitudinal kab teeb, crossbeams, thiab ncua kev kawm ntawv cov khoom siv.Kev nyab xeeb -cov khoom tseem ceeb hauv qab: -cov khoom tseem ceeb: (high-lub zog version), A- ncej (sib zog), thiab lub ru tsev kab teeb (reinforcement).Tshwj xeeb lub tsheb Cheebtsam: Engineering tsheb lub cev ntas, thiab lub teeb- lub luag hauj lwm crane caj npab Cheebtsam (me me).
3.4 Qste500TM Steel Phaj
Lub zog siab tshaj plaws ntawm plaub, nrog rau kev txo qis me ntsis - haum rau siab - load, siab - kev nyab xeeb tsheb core structural Cheebtsam: Core load- cov khoom siv bearing: hnyav tsheb chassis lub ntsiab kab teeb, ncej rails, thiab qag brackets.Kev nyab xeeb - qhov rooj:{5}} kab teeb (siab-lub zog version), B- ncej (qhov tseem ceeb qhov cuab lub zog), thiab pem hauv ntej / nram qab longitudinal beams (kev cuam tshuam- qhov chaw tiv taus).Special applications: High{11}}kev ua tau zoo tsheb lub cev ntas, thiab lub teeb yuag automotive yam ntxwv qhov chaw (txo qhov hnyav thaum ua kom muaj kev nyab xeeb).
5. Kev sib piv cov qhab nia sib npaug thoob ntiaj teb
Plaub QsteTM series cov qhab nia muaj cov qhab nia sib npaug thoob ntiaj teb cov qauv tseem ceeb, ua kom yooj yim hloov pauv rau kev hla -txoj haujlwm tsheb thauj mus los thiab kev yuav khoom thoob ntiaj teb. Lawv zoo sib npaug rau S-MC series hauv EN 10149-2 tus qauv:
|
Qib Qste |
Tus qauv European (EN 10149-2) |
American txuj (ASTM) |
Suav Standard (GB / T / Q / BQB) |
Japanese Standard (JIS) |
|---|---|---|---|---|
|
Qste 380 TM |
S420MC (1.0980) |
ASTM A607 Qib 60 |
Q380TM (Q/BQB 310) |
SPFH540 |
|
Qste 420 TM |
S420MC (1.0980) |
ASTM A607 Qib 65 |
Q420TM (Q/BQB 310) |
SPF 590 |
|
Qste 460 TM |
S460MC (1.0982) |
ASTM A607 Qib 70 |
Q460TM (Q/BQB 310) |
SPFH600 |
|
Qste 500 TM |
S500MC (1.0984) |
ASTM A607 Qib 75 |
Q500TM (Q/BQB 310) |
SPFH700 |
Cov Lus Cim Tseem Ceeb: Cov European S-MC series (S420MC, S460MC, S500MC) yog qhov sib npaug ncaj qha, sib koom tib lub thermo- cov tshuab ua haujlwm thiab ntsuas kev ua haujlwm. Suav QXXXTM qib tau ua tiav nrog QsteTM series, haum rau kev tsim tsheb hauv tsev thiab xa tawm -kev tsim khoom.
Cov lus nug nquag nug (FAQ)
1. Dab tsi yog qhov txawv ntawm Qste380TM, Qste420TM, Qste460TM, thiab Qste500TM?
Qhov tseem ceeb sib txawv yog lawvyield zog, uas maj mam nce ntawm 380 MPa (Qste380TM) mus rau 500 MPa (Qste500TM). Raws li lub zog nce, ductility thiab formability txo me ntsis, thaum tus nqi nce.
2. Qste420TM puas tuaj yeem hloov Qste380TM ncaj qha?
Yog lawm. Qste420TM muaj zog dua thiab qis dua me ntsis dua li Qste380TM. Nws tuaj yeem hloov tau ncaj qha Qste380TM rau qis- cov khoom thauj khoom, muab kev thauj khoom zoo dua - cov kabmob muaj peev xwm, tab sis yuav ua rau cov nqi khoom nce ntxiv.
3. Puas yog Qste500TM haum rau cov khoom siv stamping nyuaj?
Tsis pom zoo. Qste500TM muaj lub zog siab tab sis kuj tsis zoo formability, yuav tsum tau lub vojvoog loj dua. Nws yog qhov tsim nyog rau cov khoom siv yooj yim mus rau nruab nrab (piv txwv li, chassis beams), thaum cov khoom siv stamping nyuaj yuav tsum xaiv Qste380TM lossis Qste420TM.
4. Qhov sib npaug ntawm Qste460TM hauv European qauv yog dab tsi?
Qhov sib npaug European ntawm Qste460TM yogS460 MC(EN 10149-2 tus qauv, cov khoom siv naj npawb 1.0982), uas muaj tib lub zog tawm los (Ntau dua lossis sib npaug ntawm 460 MPa) thiab cov khoom siv hluav taws xob- ua haujlwm, tsim nyog rau cov haujlwm hla ciam teb tsheb.
5. Qib twg yog tus nqi tshaj plaws - zoo rau cov khoom siv hauv tsheb?
Qste420TM yog tus nqi tshaj -zoo. Nws sib npaug lub zog, formability, thiab nqi, haum rau feem ntau nruab nrab - thauj khoom automotive structural Cheebtsam (piv txwv li, chassis crossbeams, qhov rooj tiv thaiv - kev sib tsoo beams), thiab yog qib siv dav tshaj plaws hauv plaub.
6. Puas yog plaub qib xav tau cov txheej txheem vuam sib txawv?
No. All four grades have excellent weldability and can use the same welding processes (spot welding, CO₂ gas shielded welding). The only difference is that Qste460TM and Qste500TM may require slight preheating for thick sheets (>10mm) kom tsis txhob weld brittleness.
7. Dab tsi yog qhov thickness ntau ntawm plaub daim hlau?
All four grades are available in thicknesses of 1.5~12.0mm, with width up to 1600mm, suitable for various automotive structural components. For thickness >8mm, qhov tsawg kawg nkaus yield zog txo los ntawm 20 MPa.