Steel rail, peb kuj hu ua rails, lem, yog ib qho tseem ceeb ntawm txoj kev tsheb ciav hlau. Cov hlau rail yog siv nrog kev sib koom ua ke ntawm kev tsheb ciav hlau thiab kev tsheb ciav hlau zoo li kev tsheb ciav hlau clip, railraod khi phaj, turnouts kom lub tsheb ciav hlau khiav ceev thiab khov kho yam tsis muaj kauj.
Dab tsi yog qhov sib txawv ntawm rail steel?
Rail steel hom sib txawv los ntawm cov muaj pes tsawg leeg (carbon, alloy, manganese), kev kho cua sov (lub taub hau-hardened, bainitic), thiab daim ntawv thov (hnyav nqa, siab -ceev, lub teeb rail), nrog rau ntau pawg xws li cov pa roj carbon steel, qis-Alloy Steels (xws li C-Mn), thiab siab heev} Heatened{4} Bainitic) rau kev hnav zoo tshaj plaws thiab lub zog, haum rau cov kev xav tau tshwj xeeb xws li tonnage siab lossis kev thauj mus los sai.
Los ntawm Composition / Alloy
- Carbon Steel Rails: Hom yooj yim, zoo rau kev siv dav dav.
- Tsawg-Alloy Steels: Muaj cov khoom xws li manganese, chromium, npib tsib xee rau lub zog zoo dua, hnav, thiab qaug zog tiv thaiv (xws li Carbon-Manganese steels).
- Manganese Steel: Siv rau kev siv tshwj xeeb xws li crane ntsia.
Lub hardness ntawm kub -rolled railway khiav hlau
| Khoom siv | Tensile zog / Mpa | Hardness / HB |
|---|---|---|
| U75V | Ntau dua lossis sib npaug li 980 | 280~320 |
| ua 78crv | Ntau dua lossis sib npaug rau 1080 | 310~360 |
| ua 76kr | Ntau dua lossis sib npaug rau 1080 | 310~360 |
| U77MnCr | Ntau dua lossis sib npaug li 980 | 290~330 |
Lub hardness ntawm tshav kub- kev kho tsheb ciav hlau khiav hlau
| Khoom siv | Tensile zog / Mpa | Hardness / HB |
|---|---|---|
| U75V | Ntau dua lossis sib npaug rau 1180 | 320~380 |
| ua 78crv | Ntau dua lossis sib npaug rau 1280 | 370~420 |
Los ntawm Kev Kho Kub Kub / Microstructure
- Thaum tshav kub kub-Kho Rails: Rov ua dua tom qab dov rau cov khoom txhim kho, suav nrog hauv online (hauv-line) lossis kev kho mob offline.
- Lub taub hau-Hardened (HH) Rails: Hardened nto rau hnyav hnav tsis kam, zoo tagnrho rau metro / siab- cov kab ceev, nrog cov ductile core.
- Bainitic Rails: feature bainitic microstructure rau kev tiv thaiv zoo heev - qaug zog, txo cov kev xav tau sib tsoo.
- Martensitic Rails: Lwm hom siab heev muab lub zog siab thiab hardness.
Los ntawm Daim Ntawv Thov / Qhov hnyav
- Lub Teeb Rail: Tsawg qhov hnyav ib 'meter' (piv txwv li, 9, 12, 15, 22 kg / m), rau kev lag luam lossis ceg kab.
| Kev faib tawm | Qhov siab (mm) | Lub taub hau (mm) | Hauv qab (mm) | Thickness (mm) | Qhov hnyav (kg / m) | |
| Lub Teeb Rail | 8 KG / M | 65 | 25 | 54 | 7 | 8.42 |
| 9 KG / M | 63.5 | 32.1 | 63.5 | 5.9 | 8.94 | |
| 12 KG / M | 69.85 | 38.1 | 69.85 | 7.54 | 12.2 | |
| 15 KG / M | 79.37 | 42.86 | 79.37 | 8.33 | 15.2 | |
| 18 KG / M | 80 | 40 | 80 | 10 | 18.06 | |
- Heavy Rails: Qhov hnyav dua (piv txwv li, 43, 50, 60, 75 kg / m), rau mainlines, freight, thiab siab - kab ceev.
| Kev faib tawm | Qhov siab (mm) | Lub taub hau (mm) | Hauv qab (mm) | Thickness (mm) | Qhov hnyav (kg / m) | |
| Heavy Rail | 38 KG / M | 134 | 68 | 114 | 13 | 38.733 |
| 43 KG / M | 140 | 70 | 114 | 14.5 | 44.653 | |
| 45 KG / M | 145 | 67 | 126 | 14.5 | 45.546 | |
| 50 KG / M | 152 | 70 | 132 | 15.5 | 51.514 | |
| 60 KG / M | 176 | 73 | 150 | 16.5 | 60.64 | |
- Crane Rails: Tshwj xeeb profiles thiab cov ntaub ntawv (xws li manganese steel) rau cranes.
| Kev faib tawm | SIZE (mm) | theoretical luj | |||||||||
| qhov siab | hauv qab dav | taub hau dav | lub duav tob | ||||||||
| Crane rail | qw 70 | 120 | 120 | 70 | 28 | 52.8 | |||||
| qw 80 | 130 | 130 | 80 | 32 | 63.69 | ||||||
| QU 100 | 150 | 150 | 100 | 38 | 88.96 | ||||||
| qw 120 | 170 | 170 | 120 | 44 | 118.1 | ||||||
Txij li thaum xyoo 2008, GNEE RAIL tau muab cov hlua hlau sib txawv rau ntau tshaj 18 xyoo, steel rails los ntawm GNEE tau pom zoo nyob hauv Suav teb thiab txawv teb chaws.Wtih cov cuab yeej txiav ntug, GNEE tsim cov khoom zoo steel hlau uas ua tau raws li cov kev cai ntawm 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.