A hlau railyog lub luag haujlwm tseem ceeb- nqa thiab taw qhia cov kab ke ntawm cov kab ke, tsim kom muaj kev tiv thaiv kev ntxhov siab ntau ntxiv thaum ua kom cov tsheb ua raws li txoj hauv kev ruaj khov. Nws ua raws li ob qho tib si cov tswv cuab thiab cov lus qhia meej.GNEE RAILtsim thiab muab khoom siv raws li GB, UIC, DIN536, JIS, AS1085, BS11, thiab AREMA / ASCE cov qauv, suav nrog cov tsheb ciav hlau, cov tsheb hnyav, thiab cov tsheb ciav hlau xws liQ70–QU120thiab DIN A55–A120, nrog rau cov kev pabcuam suav nrog qhov ntev customized, kev kho saum npoo, thiab tag nrho -khiav qhov system muab.
Dab tsi yog qhov zoo tib yam rails ua los ntawm?
Cov kev tsheb ciav hlau zoo tib yam yog tsim los ntawm siab - lub zog, siab - carbon steel, ib qho kev tsim cov hlau uas tsim los rau kev ua haujlwm hnyav, tawv, thiab hnav tsis kam los tuav lub tsheb ciav hlau hnyav, kev cuam tshuam, thiab kev ntxhov siab tsis tu ncua, nrog manganese thiab silicon ntxiv rau lub zog thiab lub zog, hloov cov laus, tsis tshua muaj zog hlau lem.
Cov Khoom Tseem Ceeb & Cov Khoom:
- Cov ntsiab lus carbon siab: Ua kom muaj zog thiab tensile zog, tseem ceeb heev rau kev coj tus kheej siab.
- Manganese: Boosts lub zog thiab hnav tsis kam (ua kom puas).
- Silicon: Pab tswj kev tsim oxide thaum tsim khoom.
- Tsawg Phosphorus & Sulfur: Tiv thaiv brittleness thiab tawg, txhim kho kev nyab xeeb.
- Kub Rolled Steel: Cov txheej txheem tsim khoom tseem ceeb uas muab cov hlua lawv lub zog thiab cov duab.
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: ≤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 (Bainitic) | 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 |
Yuav ua li cas rails tsim?
Hlau ntsia hlau yog tsim los ntawm melting siab - carbon steel, txuas ntxiv nrum nws mus rau hauv loj billets, cua sov cov billets nyob rau hauv lub cub tawg, thiab ces hla lawv los ntawm ib tug series ntawm rollers nyob rau hauv ib tug dov zeb kom maj mam muab lawv mus rau hauv lub I-beam profile ntawm ib tug rail. Tom qab dov, cov ntsia hlau tau tswj kom txias, ncaj, thiab qee zaum kev kho cua sov (xws li quenching thiab tempering) rau kev txhim kho kev hnav tsis kam, ua ntej raug txiav kom ntev los yog welded rau hauv txoj hlua ntev welded (LWRs).
1. Steelmaking & Casting
- Raw Khoom:High- carbon steel, feem ntau siv dua tshiab, yog yaj hauv qhov cub (zoo li EAF lossis BOF).
- Kev kho kom zoo:Cov hlau molten feem ntau yog refined (nqus degassing) kom tshem tawm impurities, txhim kho sab hauv.
- Nruam Casting:Cov hlau ua kua yog nchuav mus rau hauv lub nrum caster los tsim cov duab plaub loj lossis square "blooms" (billets).
2. Rolling
- Cua sov:Billets yog reheated rau ib ncig ntawm 1250 ° C nyob rau hauv ib tug sov so qhov cub kom lawv malleable.
- Descaling:Siab - cov dav hlau dej siab tshem tawm oxide nplai los ntawm qhov chaw kub.
- Shaping:Lub billet yog dhau los ntawm ntau pawg ntawm grooved rollers (roughing, intermediate, thiab finishing stands) uas maj mam tsim lub taub hau, lub vev xaib, thiab lub hauv paus ntawm txoj kev tsheb ciav hlau.
3. Tiav & Kev Tshuaj Xyuas
- Cua txias:Rails txias maj mam thiab tswj tau los tiv thaiv kev ntxhov siab sab hauv thiab ua tiav cov khoom xav tau; qhov no tuaj yeem yog ntuj lossis tswj tau.
- Straightening:Ib tug multi-roll straightener kho txhua qhov khoov, kom ntseeg tau qhov ntev.
- Kev kho cua sov (yeem):Rau qhov hnyav - txoj haujlwm rails, quenching (ceev txias) ua raws li tempering tsub kom tawv tawv thiab hnav tsis kam.
- Vuam:Tus kheej txoj kab (piv txwv li, 25m) yog flash- taub qab welded rau hauv txoj kab ntev heev (500m +) kom txo cov pob qij txha.
- Kev tshuaj xyuas:Kev kuaj ultrasonic kuaj xyuas qhov tsis zoo ntawm sab hauv, thiab kev sib tsoo tshem tawm "cov tawv nqaij dov" los ntawm qhov chaw khiav.
Txij xyoo 2008,GNEE RAILtau muab steel rails ntawm cov qib sib txawv rau ntau tshaj 18 xyoo, steel rails los ntawm GNEE yog heev recommened nyob rau hauv Tuam Tshoj thiab txawv teb chaws.Wtih txiav ntug khoom, GNEE ua tau zoo steel rails uas tau raws li cov kev cai ntawm feem ntau lub teb chaws. Standard rail, lub taub hau hardened rail, hnyav rail, lub teeb rail, crane rail thiab lwm yam yog tag nrho cov muaj nyob ntawm no, raws li ib tug ntawm cov Tuam Tshoj lub ntsiab rail tsum, GNEE RAIL tau ua hauj lwm rau muab kev lag luam ntsuab railway khoom thoob plaws lub ntiaj teb no.