1. Dab tsi ua rau lub tsheb ciav hlau kawg thiab nws txo qis li cas?
Battering tshwm sim los ntawm kev cuam tshuam ntawm cov pob qij txha vim:
Log flats
Loose fishplates
Kev sib raug zoo tsis zoo
Cov kev daws teeb meem suav nrog:
Welded pob qij txha
Tshwj xeeb alloy kawg-post hardening
Kev cuam tshuam -absorbing bars
2. Cov kev tsheb ciav hlau raug tshuaj xyuas li cas rau hydrogen embrittlement?
Cov txheej txheem suav nrog:
Kev kuaj qeeb qeeb
Kev ntsuas hydrogen permeability
Fractogram tsom xam
High-strength rails (>1300MPa) yog qhov yooj yim tshaj plaws. Ci ntawm 200℃rau 24 teev tuaj yeem nthuav tawm cov khoom siv hydrogen.
3. Dab tsi yog qhov zoo ntawm asymmetric rail profiles?
Asymmetric designs (xws li, rau ntse nkhaus) feature:
Thicker gauge - sab taub hau
Txhim kho lub vev xaib
Offset ko taw
Qhov no ncua kev pab cuam lub neej 40-60% nyob rau hauv nkhaus nyob rau hauv 300m vojvoog.
4. Rail metallurgy cuam tshuam li cas rau hnav tsis kam?
Qhov tseem ceeb metallurgical yam:
Pearlite interlamellar sib nrug(zoo tshaj 0.1-0.2μm)
Carbide morphology
Ua ntej austenite grain loj
Niaj hnub nimno lub taub hau- cov hlua khov ua tiav 350-400HB hardness los ntawm kev tswj kom txias.
5. Dab tsi yog qhov kev sib tw ntawm kev saib xyuas ntawm grooved rails?
Siv nyob rau hauv tram systems, grooved rails xav tau:
Tshwj xeeb sib tsoo taub hau
Nquag tshem tawm cov khib nyiab
Anti- dej nyab
Hnav concentrates ntawm zawj npoo, yuav tsum tau 3x nquag tshuaj xyuas dua li tus qauv ntsia.