Hlau Railsyog qhov tseem ceeb ntawm txoj kev tsheb ciav hlau tau muab tso rau hauv ob qho tib si kab sib txuas los muab qhov txuas ntxiv, ruaj khov thiab theem saum npoo rau kev khiav tsheb ciav hlau. Lub tsheb ciav hlau hnyav thiab ceev ceev yuav tsum tau ua kom muaj kev ntxhov siab ntau dua, yog li lawv tau tsim los ntawm cov pa roj carbon siab (carbon -0.6% txog 0.8%, manganese 0.8% -1.3%, silicon 0.1% -0.5%, sulfur thiab phosphorus 0.03% siab tshaj txhua, thiab txhuas 0.015% siab tshaj).
Dab tsi yog qhov sib txawv ntawm rail steel?
Rail steel hom sib txawv los ntawm cov muaj pes tsawg leeg (carbon, alloy) thiab kev kho mob (lub taub hau-hardened, bainitic), cais los ntawm qhov hnyav (lub teeb / hnyav), profile (pas- hauv qab, bullhead), los yog daim ntawv thov (crane, siab - nrawm), nrog ntau hom xws li cov pa roj carbon steel, qis- alloy, thiab siab heev hardened lub taub hau{4} kab.
Los ntawm Chemical Composition & Treatment
- Carbon Steel Rails: Basic, tus nqi -zoo, siv nyob rau hauv qis dua - kab tsheb.
- Tsawg-Alloy Steel Rails: Muaj cov khoom xws li Manganese, Chromium, Nickel kom muaj zog thiab hnav tsis kam (xws li Manganese-Copper, High Silicon).
- Lub taub hau-Hardened (HH) Rails: Thaum tshav kub kub- kho kom tsim tau ib qho nyuaj heev (super- txheej tawv) rau siab - hnav thaj chaw zoo li cov kab metro, thaum ua kom cov ductile.
- Bainitic Rails: Tsim kom muaj kev qaug zog siab, txo qhov xav tau kev sib tsoo.
- Manganese Steel: Siv rau crane rails vim toughness.
Cov tshuaj muaj pes tsawg leeg ntawm tsheb ciav hlau khiav steel
| Tsis muaj. | Element | Muaj nuj nqi |
|---|---|---|
| 1 | C | Txhim kho lub zog, hardness, thiab hnav tsis kam ntawm txoj kev tsheb ciav hlau. Cov ntsiab lus carbon ntawm cov tsheb ciav hlau hauv tsev yog 0.65% txog 0.82%. Thaum cov ntsiab lus carbon yog qhov siab, cov hlau ua nkig, thiab nws cov plasticity Performance index yuav txo qis. Nyob rau tib lub sijhawm, nws yuav ua rau kom muaj feem ntawm cov pob dawb hauv cov hlau. |
| 2 | Si | Nws yog ib qho yooj yim los ua ke nrog oxidation thiab tuaj yeem ua lub luag haujlwm ntawm kev tshem tawm npuas hauv cov hlau. Cov hlau muaj qhov tsim nyog ntawm silicon, uas tuaj yeem txhim kho hardness thiab hnav tsis kam ntawm cov hlau. Cov ntsiab lus ntawm kev tsheb ciav hlau hauv tsev feem ntau yog 0159-0.9%, tab sis cov ntsiab lus ntau dhau yuav ua rau cov hlau nyuaj thiab nkig, thiab nws yooj yim los tsim cov pores hauv qhov vuam. |
| 3 | Mn | Nws yog ib qho txiaj ntsig zoo uas tuaj yeem txhim kho lub zog thiab hnav tsis kam ntawm cov hlau thiab ua rau kom muaj zog ntawm cov hlau. Nws tuaj yeem tshem tawm cov teeb meem hlau oxide thiab sulfide inclusions hauv cov hlau. Cov ntsiab lus manganese feem ntau tswj ntawm 0.6% thiab 1.54%. Hlau nrog cov ntsiab lus manganese ntau dua 1.2% yog hu ua nruab nrab manganese steel, thiab nws cov hnav tsis kam yog siab heev. |
| 4 | Cu | Nws yog ib qho txiaj ntsig zoo. Cov hlau muaj tsawg tus tooj liab sib txuas, uas tuaj yeem txhim kho qhov qaug zog thiab corrosion tsis kam ntawm cov hlau. Cov ntsiab lus tooj liab ntawm cov hlau hauv tsev yog feem ntau ntawm 0.10% thiab 0.40%. Yog tias cov txheej txheem dov ntawm cov tooj liab- muaj cov tsheb ciav hlau tsis zoo, cov ntses- zoo li cov kab nrib pleb yuav tshwm sim ntawm qhov chaw tsheb ciav hlau |
| 5 | P | Nws yog ib qho teeb meem. Qhov phom sij loj tshaj plaws ntawm phosphide yog txo cov plasticity thiab toughness ntawm cov hlau. Tshwj xeeb tshaj yog nyob rau hauv qis kub, qhov txias brittleness ntawm cov hlau nce, uas yooj yim ua rau tawg rails, thiab nws cov ntsiab lus yog tswj tsis pub tshaj 0.04%. |
| 6 | S | Cov sulfur yog ib qho teeb meem. Nws feem ntau yog nyob rau hauv cov hlau nyob rau hauv daim ntawv ntawm granules. Thaum lub tsheb ciav hlau yog dov, nws yog dov ua ke nrog cov hlau rau hauv cov ntawv, uas ua rau delamination los yog longitudinal tawg nyob rau hauv txoj kev tsheb ciav hlau. Tus nqi ntawm sulfur yog tswj tsis pub ntau tshaj 0.05% |
Los ntawm Daim Ntawv Thov & Qhov hnyav
- Lub Teeb Rail: Tsawg qhov hnyav ib 'meter' (piv txwv li, 9kg, 22kg) rau sib dua -cov haujlwm lossis cov kab lag luam.
| 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, 50kg, 60kg) rau cov kab loj, thauj khoom, thiab siab - kev tsheb ciav hlau 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 (piv txwv li, QU Series): Tshwj xeeb manganese steel rails rau crane lem.
| 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 | ||||||
- High -Speed Rails: Tshwj xeeb, feem ntau seamless, siab - cov ntaub ntawv muaj zog (xws li U71MnG, U75V) rau 250-350 km / h kab.
| 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 | - | - | ≤ 0.035 | ≤ 0.030 | ≥880 |
| U75V | 0.71~0.80 | 0.50~0.80 | 0.75~1.05 | - | 0.04~0.12 | ≤ 0.035 | ≤ 0.030 | ≥980 |
| ua 78crv | 0.72~0.82 | 0.50~0.80 | 0.70~1.05 | 0.30~0.50 | 0.04~0.12 | ≤ 0.035 | ≤ 0.030 | ≥1080 |
| U77MnCr | 0.72~0.82 | 0.10~0.50 | 0.80~1.10 | 0.25~0.40 | - | ≤ 0.035 | ≤ 0.025 | ≥980 |
| ua 76kr | 0.71~0.81 | 0.50~0.80 | 0.80~1.10 | 0.25~0.35 | 0.04~0.08 | ≤ 0.035 | ≤ 0.025 | ≥1080 |
Txij xyoo 2008,GNEE RAILtau muab steel rails ntawm ntau 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 cov cuab yeej, GNEE ua tau zoo steel rails 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.