Rail steel yog dab tsi?
Jan 21, 2026
A hlau railyog ib qho tseem ceeb ntawm cov txheej txheem ntawm txoj kev tsheb ciav hlau, tsim los muab qhov chaw ruaj khov thiab ruaj khov rau lub tsheb ciav hlau log thaum muaj kev nyab xeeb xa cov khoom thauj mus rau cov neeg pw tsaug zog thiab ballast. Hlau ntsia hlau yuav tsum sib xyaw ua ke siab zog, hnav tsis kam, thiab tawv kom tiv taus cov khoom hnyav, rov ua dua, thiab sib txawv ib puag ncig.
Rail steel yog dab tsi?
Rail steel feem ntau yog siab - carbon steel nrog ua tib zoo tswj cov alloying ntsiab lus uas txhim kho nws cov khoom siv kho tshuab. Cov qib siv feem ntau suav nrog U71Mn, U75V, 50Mn, thiab R260, nyob ntawm cov qauv hauv cheeb tsam thiab kev ua haujlwm. Cov tshuaj muaj pes tsawg leeg feem ntau suav nrog carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulfur (S), thiab qee zaus me me ntawm vanadium (V) lossis chromium (Cr) los txhim kho hardness thiab hnav tsis kam.
| Element | Ntau yam (U71Mn) | Muaj nuj nqi |
|---|---|---|
| C | 0.70–0.80% | Hardness thiab lub zog |
| Mn | 1.20–1.60% | Toughness thiab hnav tsis kam |
| Si | 0.15–0.35% | Deoxidation, elasticity |
| P | Tsawg dua lossis sib npaug li 0.035% | Tiv thaiv brittleness |
| S | Tsawg dua lossis sib npaug li 0.035% | Txo kev tawg yooj yim |
| V | 0.05-0.10% (yeem) | Grain refinement, hnav tsis kam |
Common Rail Steel Qib Ntiaj Teb:
| Qib | Standard / cheeb tsam | Kev sib xyaw ua ke (wt%) |
| R260 | TS EN 13674-1 (Tebchaws Europe) | C: 0.67–0.80, Mn: 0.90–1.20, Si: Tsawg dua lossis sib npaug rau 0.50 |
| R350 HT | TS EN 13674-1 (Tebchaws Europe) | C: 0.75–0.85, Mn: 0.80–1.20, Cr: 0.20–0.50 |
| Qib 260 | AREMA (North America) | C: ~0.77, Mn: ~1.0–1.2, Si: ~0.2 |
| Qib 350 | AREMA + Mill Specs (USA/Canada) | C: 0.78–0.83, Mn: 0.90–1.20, Cr: 0.2–0.6, + V/Nb (microalloyed) |
| BH Rail (Baitic) | JIS E 1101 (Nyiv), tau txais kev pom zoo hauv EU / Is Nrias teb | C: 0.65–0.80, Mn: 1.0–1.4, Cr/Mo/Ni (yeem, zeb- tshwj xeeb) |
| ua 71mn | GB / T 2585 (Tuam Tshoj) | C: 0.65–0.77, Mn: 1.10–1.40, Si: 0.15–0.35 |
| U75V | GB / T 2585 (Tuam Tshoj) | C: 0.67–0.77, Mn: 0.70–1.00, V: 0.04–0.12 |
Paub meej Steel Qib thiab Mechanical Properties:
| Qib Steel | C (%) | Si | Mn | Cr | V | P | S | Tensile zog (Rm / MPa) |
|---|---|---|---|---|---|---|---|---|
| ua 71mn | 0.65–0.76 | 0.15–0.58 | 0.70–1.40 | – | – | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.030 | Ntau dua lossis sib npaug rau 880 |
| U75V | 0.71–0.80 | 0.50–0.80 | 0.75–1.05 | – | 0.04–0.12 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.030 | Ntau dua lossis sib npaug li 980 |
| ua 78crv | 0.72–0.82 | 0.50–0.80 | 0.70–1.05 | 0.30–0.50 | 0.04–0.12 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.030 | Ntau dua lossis sib npaug rau 1080 |
| U77MnCr | 0.72–0.82 | 0.10–0.50 | 0.80–1.10 | 0.25–0.40 | – | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.025 | Ntau dua lossis sib npaug li 980 |
| ua 76kr | 0.71–0.81 | 0.50–0.80 | 0.80–1.10 | 0.25–0.35 | 0.04–0.08 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.025 | Ntau dua lossis sib npaug rau 1080 |
Puas yog txoj kab ntawm cov qauv sib txawv siv cov khoom qub?
Tsis yog, ntsia ntawm cov qauv sib txawv tsis tas yuav siv cov khoom siv tib yam nkaus; lawv siv cov qib sib txawv thiab cov khoom sib xyaw ntawm cov hlau (xws li carbon-}manganese, alloy, taub hau-hardened), teev los ntawm cov qauv (AREMA, UIC, EN) kom tau raws li cov kev xav tau tshwj xeeb rau lub zog, hnav, hardness, thiab weldability, ua rau muaj kev hloov pauv hauv cov ntsiab lus xws li carbon, manganese, thiab phosphorus kom haum rau ntau qhov kev nyab xeeb thiab kev sib tw{2}.
Qhov txawv tseem ceeb & piv txwv:
Khoom Focus:
- Cov qauv txawv teb chaws (AREMA, BS, UIC): Feem ntau tsom rau kev txhim kho qis -kub toughness, corrosion resistance, thiab adaptability rau tej huab cua, siv cov ntaub ntawv sib xyaw ua ke ntau dua.
- National Standards (xws li Tuam Tshoj's GB): Tej zaum yuav optimize rau qaug zog tiv thaiv, weldability, thiab nqi, siv U-series tshav kub- kho steels.
Cov ntsiab lus tshwj xeeb:
- Manganese (Mn): High manganese steel yog ib qho kev ua haujlwm - hardening zog, tab sis qib sib txawv.
- Cov pa roj carbon (C): Qhov tseem ceeb rau lub zog, nrog rau qhov sib txawv ntawm cov qauv.
- Phosphorus (P) & Sulfur (S): Khaws qis raws li impurities los tiv thaiv brittleness, nrog kev txwv txawv los ntawm tus qauv (xws li, ASTM txwv P txog 0.04%).
- Qib: Cov qauv txhais cov qib tshwj xeeb (xws li UIC 900A, AREMA 700/900, GB U75V) uas cuam tshuam rau tensile lub zog thiab hardness, tsis yog raw khoom.
- Kev kho cua sov: Cov qauv sib txawv qhia cov kev kho cua sov sib txawv (xws li lub taub hau hardening) kom ua tiav cov khoom xav tau, cuam tshuam cov khoom siv kawg.
Raws li tus kws tshaj lij rail fastener tsum,GNEE RAILtuaj yeem muab cov qauv hlau sib txawv xws li GB, Asmeskas, BS, UIC, DIN, JIS, Australian thiab South Africa uas siv hauv kev tsheb ciav hlau, cranes thiab thee mining.
| Txuj | Sepc. | Khoom Qib Qib |
| UIC860 | UAS 54 | 700,900A,900B |
| UAS 60 | ||
| EN13674.1 | 5.00E+02 | R200, R350HT, R260Mn, R35LHT, R320Cr, R370CrHT |
| 5.40E+02 | ||
| 6.00E+02 | ||
| 6.00E+03 | ||
| IB 11-1985 | BS80A | 700,900A,900B |
| BS 90 A | ||
| BS100A | ||
| AREMA | 115 RA | SS, HH, LA, IH |
| 136 ROJ | ||
| UAS 60 | ua 71mn | |
| TIAB SA 85 | ua 71mn | |
| GB 2585-2007 | 50kg / m | ua 71mn |
| 60kg / m | U75V | |
| 75kg / m | ||
| TB/T2344-2012 | 50kg / m | U71Mn, U75V, U77MnCr |
| 60kg / m | ua 78crv | |
| 75kg / m | ||
| GB 11264-1989 | 8 kg/m | Q235 |
| 12kg / m | Q235 | |
| 15kg / m | 55Q, Q235 | |
| 18kg / m | 55Q, Q235 | |
| 22kg / m | 55Q, Q235 | |
| 24kg / m | 55Q, Q235 | |
| 30kg / m | 55Q, Q235 | |
| 38kg / m | 50mn, ua 71 | |
| 43kg / m | 50mn, ua 71 | |
| GB Crane Rail | qw 70 | ua 71mn |
| qw 80 | ua 71mn | |
| QU 100 | ua 71mn | |
| qw 120 | ua 71mn |
