Q460E yog lub siab -lub zog qis- alloy structural steel phaj, dav siv nyob rau hauv Suav teb rau kev siv engineering tseem ceeb uas xav tau kev sib xyaw ua ke ntawm lub zog siab, zoo toughness, thiab weldability. Nws lub npe ua raws li Suav teb tus qauv GB / T 1591-2018 "High Strength Low Alloy Structural Steels."
Ntawm no yog cov ncauj lus kom ntxaws txog lub npe txhais li cas thiab nwsCov yam ntxwv tseem ceeb:
Decoding lub npe "Q460E"
Q (Qu Fu Dian): Sawv rau Yield Strength hauv Suav.
460: Qhia qhov tsawg kawg nkaus tawm lub zog yog 460 Megapascals (MPa) rau steel nrog lub nominal thickness tsawg dua los yog sib npaug rau 16 hli. Qhov no yog qib siab zog heev.
E: Sawv cev rau qib zoo lossis qib toughness, qhia txog cov hlau cuam tshuam toughness ntawm qhov kub thiab txias. "E" txhais tau hais tias Charpy V-qhov ntsuas qhov cuam tshuam tau ua ntawm -40℃.
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm
Lub zog siab heev: Nws qhov tsawg kawg nkaus tawm lub zog (Ntau dua lossis sib npaug ntawm 460 MPa) yog qhov siab dua li siv Q235 (~ 235 MPa) thiab Q355 (~ 355 MPa) steels. Qhov no tso cai rau kev sib dua thiab ntau dua cov qauv tsim, txo cov khoom hnyav thiab lub hauv paus loads.
Zoo heev Low-Temperature Toughness (Lub Core ntawm "E" Qib):
Qib "E" ua kom cov hlau tuav tau zoo ductility thiab tsis kam ua kom tawg ntawm qhov kub thiab txias li -40 degree.
Qhov no ua rau nws zoo tagnrho rau cov qauv hauv cov huab cua txias, xws li txuas hniav nyob rau sab qaum teb, cov ntug dej hiav txwv, cov cua turbine yees, thiab cov tsev siab siab -, qhov twg cov khoom siv tawv yog qhov tseem ceeb rau kev nyab xeeb.
Zoo Weldability:
Txawm hais tias nws lub zog siab, Q460E yog tsim los ua welding. Txawm li cas los xij, vim nws cov ntsiab lus siab dua (thiab yog li siab dua Carbon Equivalent tus nqi piv rau cov qib qis), nws yuav tsum tau tswj cov txheej txheem vuam ntau dua.
Qhov no suav nrog kev siv qis-hydrogen electrodes, tsim nyog ua ntej- cua sov, tswj cov khoom siv hluav taws xob, thiab qee zaum tom qab-weld kev kho cua sov los tiv thaiv cov teeb meem xws li txias tawg thiab khaws cia cov khoom siv hluav taws xob ntawm tshav kub-Teb chaws cuam tshuam (HAZ).
Hom tshuaj muaj pes tsawg leeg
Txhawm rau ua tiav nws cov khoom, Q460E muaj cov ntsiab lus sib npaug sib npaug:
Carbon (C) & Manganese (Mn): Muab lub hauv paus zog thiab hardenability.
Micro-Alloying Elements: Xws li Niobium (Nb), Vanadium (V), Titanium (Ti). Cov no yog cov tseem ceeb rau cov nplej refinement thiab nag lossis daus ntxiv dag zog, ntxiv dag zog thiab toughness yam tsis muaj kev cuam tshuam loj weldability.
Strict Impurity Control: Tsawg heev ntawm Sulfur (S) thiab Phosphorus (P) los txhim kho toughness thiab txo kub / txias brittleness.
Cov cheeb tsam tseem ceeb ntawm daim ntawv thov
Q460E yog siv rau hauv cov khoom tseem ceeb tshaj plaws ntawm cov loj, hnyav-lub luag haujlwm, lossis kev nyab xeeb- cov qauv tseem ceeb:
Lub ntsiab load-cov kabmob ntawm cov loj- cov txuas txuas (piv txwv li, arches, truss chords, choj yees).
Heavy-cov haujlwm crane booms thiab cov khoom siv mining.
Siab-nce thiab siab heev- nce lub tsev cov qauv (piv txwv li, tub ntxhais kab ke, hloov girders).
Offshore drilling platforms thiab cua zog infrastructure.
Txhawb cov qauv hauv thaj tsam seismic thiab thaj chaw txias heev.
Sib piv nrog Cov Qib Zoo sib xws
vs. Q460C/D: Q460E muaj superior qis-kub toughness. C=0 degree, D=-20 degree, E=-40℃. Rau qhov tsis yog- qhov chaw txias, C lossis D tuaj yeem txaus.
vs. Q420E: Q460E muaj lub zog ntau dua (Ntau dua lossis sib npaug ntawm 460 MPa vs. Ntau dua lossis sib npaug ntawm 420 MPa tawm los), tso cai rau kev ua kom hnyav ntxiv, tab sis tej zaum yuav nyuaj dua me ntsis rau vuam.
vs. Q550E lossis siab dua: Q460E muaj qhov sib npaug zoo ntawm lub zog, toughness, thiab weldability / fabrication nqi. Cov qib siab dua (550, 690 MPa) muaj zog dua tab sis nyuaj dua rau kev tsim thiab vuam.
Cov lus xaus
| Feature | Kev piav qhia rau Q460E |
|---|---|
| Txuj | GB/T 1591-2018 (Tuam Tshoj) |
| Hom | Siab -Lub zog qis-Alloy (HSLA) Cov Qauv Hlau |
| Yam tsawg kawg nkaus Yield Strength | 460 MPa (rau thickness Tsawg dua los yog sib npaug rau 16mm) |
| Quality / Toughness Qib | Qib E - Kev ntsuas cuam tshuam ntawm -40 degree |
| Cov khoom tseem ceeb | Lub zog siab heev, zoo heev qis-kub toughness, zoo weldability (nrog rau kev tswj) |
| Hom Alloying Elements | C, Mn, plus micro- alloys (Nb, V, Ti) |
| Cov ntawv thov siv | Qhov tseem ceeb ntawm qhov loj - ncua txuas txuas, offshore platforms, siab -nce, cov tshuab hnyav hauv huab cua txias |
Hauv qhov tseem ceeb, Q460E yog tus hwm- qib kev tsim kho steel tsim rau kev thov cov ntawv thov uas tsis ua haujlwm tsis yog qhov kev xaiv. Nws txoj kev xaiv yog tsav los ntawm qhov xav tau los txo qhov hnyav ntawm cov qauv, tiv taus qhov kub thiab txias ib puag ncig, thiab ua kom ntev - lub sij hawm kev nyab xeeb thiab kav ntev nyob rau hauv hnyav loads. Nws siv ib txwm yuav tsum tau nruj me ntsis ua raws li tshwj xeeb tsim thiab fabrication codes.