Txoj kev tsheb ciav hlau yog ib qho tseem ceeb ntawm txoj kev tsheb ciav hlau, thiab nws txoj haujlwm yog coj lub tsheb ciav hlau lub log mus rau pem hauv ntej los ntawm kev tiv thaiv lub zog loj ntawm lub log.
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.
| 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 | |
| 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 | |
| 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 | ||||||
Dab tsi yog qhov muaj pes tsawg leeg ntawm rail steel?
Rail steel feem ntau yog siab - carbon steel, nrog rau cov khoom tseem ceeb yog Hlau (Fe), Carbon (C) (ze li 0.6-0.8% rau lub zog), thiab Manganese (Mn) (0.7-1.3% rau hardness / toughness). Nws kuj tseem muaj cov nqi me me ntawm Silicon (Si) (rau qhov ntom), nrog kev txwv nruj ntawm cov khoom tsis zoo xws li Phosphorus (P) thiab Sulfur (S) (hauv qab 0.05%) los tiv thaiv brittleness, ntxiv rau kev xaiv alloying ntsiab xws li Chromium (Cr), Vanadium (V), los yog Niobium (Nb) rau kev kho kom zoo dua qub, feem ntau nrog kev kho cua sov rau kev hnav zoo dua.
Cov Ntsiab Cai & Lawv Lub Luag Haujlwm:
- Carbon (C): Qhov tseem ceeb rau lub zog tensile; cov ntsiab lus siab dua (txog 0.82%) ua rau muaj zog thiab hnav tsis kam.
- Manganese (Mn): Txhim kho lub zog, tawv, thiab hnav tsis kam, tso cai rau cov ntsiab lus carbon ntau dua.
- Silicon (Si): Ua raws li deoxidizer, tshem tawm npuas thiab nce ntom.
- Phosphorus (P) & Sulfur (S): Undesirable impurities, khaws cia tsawg heev (Less tshaj los yog sib npaug rau 0.05%) los tiv thaiv txias brittleness thiab cracking.
| 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 tau dov, nws yog dov ua ke nrog cov hlau rau hauv cov nplooj ntawv, uas ua rau delamination lossis longitudinal tawg nyob rau hauv txoj kev tsheb ciav hlau. Tus nqi ntawm sulfur yog tswj tsis pub ntau tshaj 0.05% |
Common Qib & Variations:
- Cov pa roj carbon-Manganese Steel: Cov qauv kev sib tw, ntsuas lub zog thiab tus nqi.
- Alloy Steels: Ntxiv cov khoom xws li Chromium (Cr), Vanadium (V), los yog Molybdenum (Mo) kom muaj zog, hnav, thiab qaug zog.
- Thaum tshav kub kub-Kho Rails (Lub Taub Hau-Hardened): Cov pa roj carbon lossis alloy rails raug tswj kom txias, tsim kom zoo dua microstructures (pearlite / bainite) kom txhim kho cov khoom siv kho tshuab thiab kev pab cuam lub neej, tshwj xeeb tshaj yog nyob rau hauv lub taub hau rail.
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- kho railway 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 |
NtawmGNEE RAIL, peb tshwj xeeb hauv kev muab ntau yam ntawm kev tsheb ciav hlau, suav nrog cov tsheb ciav hlau hnyav, tsheb ciav hlau, tsheb ciav hlau crane thiab tsheb ciav hlau fastening, nrog rau kev sib tw siab -kev ua haujlwm tsheb ciav hlau clips thiab kev daws teeb meem. Rov qab los ntawm kev tswj hwm nruj thiab kev lag luam ntawv pov thawj, peb cov khoom raug tsim ua kom tau raws li cov qauv thoob ntiaj teb thiab ntau qhov kev xav tau.