Dab tsi ntawm steel rails yog ua los ntawm?
Jan 14, 2026
Dab tsi ntawm steel rails yog ua los ntawm?
Steel rails yog ib qho tseem ceeb ntawm railway lem, coj lub tsheb ciav hlau log thiab xa cov loads loj heev rau cov pw tsaug zog. Cov ntsia hlau feem ntau yog ua los ntawm siab - lub zog, hnav - cov hlau tsis muaj zog. Rau cov khoom siv hnyav-cov haujlwm xws li cranes (QU70-QU120) thiab hnyav rails (50{13}}75 kg/m), manganese- carbon steels xws li U71Mn yog cov qauv kev lag luam. U71Mn muaj lub zog tensile siab, zoo heev toughness thiab zoo hnav tsis kam, ua rau nws haum rau concentrated loads thiab muaj ib puag ncig. Cov qib siab zoo xws li U75V lossis European R350HT steel yog siv rau kev kub ceev lossis hnyav hnyav.
Lub rooj sib piv steel qib
| Qib | C (%) | Si (%) | Mn (%) | Tensile (MPa) | Elongation (%) | Hardness (HB) | Tej daim ntawv thov |
|---|---|---|---|---|---|---|---|
| ua 71mn | 0.65-0.76 | 0.15-0.35 | 1.10-1.40 | 880 nqi | 9 feeb | 240-270 | Hnyav rail, crane rail |
| U75V | 0.71-0.80 | 0.50-0.80 | 0.70-1.05 | 980 nqi | 9 feeb | 240-270 | High - ceev thiab hnyav tsheb ciav hlau |
| 50 Mn | 0.48-0.56 | 0.17-0.37 | 0.70-1.00 | 645 nqi | 13 feeb | - | Nruab nrab rail |
| Q235 | 0.12-0.20 | 0.30 max | 0.30-0.70 | 375-460 | 26 feeb | - | Lub teeb rail, industrial lem |
Cov qauv kev tsheb ciav hlau hnyav thiab lub teeb sib txawv li cas thoob plaws lub tebchaws
Rail cov qauv sib txawv thoob ntiaj teb, qhia txog qhov sib txawv ntawm cov kev cai thauj khoom, kev nyab xeeb thiab kev ua haujlwm. Rails yog tsim los rau GB, UIC, AREMA, BS, DIN thiab JIS cov qauv kom ntseeg tau tias muaj kev sib raug zoo nrog cov haujlwm hauv zos thiab thoob ntiaj teb. Piv txwv li, UIC 60 rails feem ntau yog siv nyob rau hauv European high - kab ceev, thaum ASCE 60 los yog 75 rails raws li American hnyav rail yuav tsum.
| Txuj | Rail hom | Qhov hnyav (kg / m) | Khoom siv | Tej daim ntawv thov |
|---|---|---|---|---|
| GB 2585-2007 | Hnyav rail | 50-75 | U71Mn / U75V | Suav siab -ceev thiab hnyav- cov kab thauj khoom |
| UIC 860 | Hnyav rail | 50-60 | 900A / 1100 | European mainline lem |
| AREMA / ASCE | Hnyav rail | 60-136 | U71Mn thiab sib npaug | American freight thiab industrial lem |
| TIAB SA 1103 | Lub teeb / nruab nrab rail | 15-50 | Cov pa roj carbon steel | Japanese industrial thiab neeg caij tsheb kab |
| GB/T 11264 | Lub teeb rail | 6-30 | Q235 / 55Q | Kev thauj mus los hauv nroog thiab teeb pom kev lag luam |
Common rail ua haujlwm
Rails feem ntau yog xa tawm raws li dov ntev thiab tom qab ntawd ua tiav rau cov qauv tsim tshwj xeeb. Kev ua haujlwm xws li kub lossis txias dabtsi yog khoov rau crane thiab mining curves, precision drilling ntawm fishplate lossis bolt qhov, lub kaum sab xis rau welded pob qij txha, kawg milling los yog sib tsoo rau ntev -rail welding alignment, sandblasting rau nto npaj thiab tiv thaiv - xeb oiling rau marine thauj, ntxiv rau rail welding los ua nruam khiav.
FAQ
Vim li cas U71Mn yog tus qauv hlau rau hnyav rails?
U71Mn sib txuas qhov tsawg kawg nkaus tensile lub zog ntawm 880 MPa, toughness thiab hnav tsis kam nrog zoo weldability, uas yog vim li cas nws dominates hnyav rail thiab crane rail ntau lawm.
Dab tsi yog qhov hardness ntawm U71Mn rail hlau?
U71Mn rails txhim kho hardness ntawm 240-270 HB, muab cov khiav nto muaj zog tiv thaiv log hnav.
Dab tsi hlau yog siv rau kev siab - nrawm nrawm?
High- cov kab ceev siv siab dua- qib zog xws li U75V (980 MPa yam tsawg kawg nkaus) lossis cua sov- kho lub taub hau- cov hlau hnyav sib npaug rau R350HT hauv qab EN 13674-1.
Q235 steel puas tuaj yeem siv rau cov kab hlau loj?
No. Q235 yog txwv rau lub teeb rail thiab kev lag luam lem; Cov kev pabcuam tseem ceeb xav tau U71Mn, U75V lossis qib siab dua.
Kuv yuav xaiv cov qib steel li cas rau crane rail?
Crane rails ib txwm teev nyob rau hauv U71Mn nrog lub taub hau hardened los tiv thaiv lub zog ntawm lub log loads ntawm crane trolleys, nrog rau seem xaiv los ntawm QU70 rau QU120 los ntawm crane muaj peev xwm.
Puas yog cov kev tsheb ciav hlau los ntawm cov qauv sib txawv tuaj yeem hloov tau?
Tsis yog tsis muaj pov thawj. Ntu qhov siab, lub taub hau thiab lub hauv paus dav thiab lub web thickness sib txawv ntawm cov qauv, yog li sib npaug profiles yuav tsum tau soj ntsuam dimensionally ua ntej hloov.
