1. Qhov siab tshaj plaws qag load rau UIC 60 yog dab tsi, thiab nws txiav txim siab li cas?
UIC 60 tuav 25–28t axles, txiav txim siab los ntawm cov khoom siv zog thiab ntoo khaub lig-section. Nws Ntau dua lossis sib npaug rau 780MPa tensile lub zog thiab 300-350HB lub taub hau hardness faib cov khoom hnyav. Cov kws tsim khoom siv cov ntsiab lus finite tsom xam thiab kev sim teb: yog tias muaj kev ntxhov siab tshaj qhov kev qaug zog txwv (≈400MPa), qag load yuav txo. Teb chaws Europe UIC 60 siab- cov kab ceev siv 20-22t qag; hnyav- cov kab tsheb mus txog 25t. Tshaj qhov txwv ua kom hnav / qaug zog.
2. Dab tsi yog lub taub hau rail hardened txheej, thiab vim li cas nws tseem ceeb rau AREMA 132RE?
Cov txheej tawv tawv yog 2-5 hli sib sib zog nqus, siab - thaj tsam hardness (340-400HB) ntawm lub taub hau tsheb ciav hlau, tsim los ntawm quenching. Rau AREMA 132RE (hnyav-haul), nws tiv taus hnav los ntawm 30-35t axles-tsis muaj nws, hnav yuav 3-4x sai dua. Cov txheej tiv thaiv yas deformation (dents), thaum lub softer core (280-320HB) absorbs kev co. Qhov "qhov tawv tawv, tawv tawv" qhov sib npaug yog qhov tseem ceeb rau kev ua haujlwm hnyav-.
3. Dab tsi yog qhov txawv ntawm "bullhead rails" thiab "flat- hauv qab rails"?
Bullhead rails muaj qhov sib luag "T" zoo li, tso siab rau cov rooj zaum hlau los zaum ntawm cov neeg pw tsaug zog. Pav ca- cov kab hauv qab muaj lub hauv paus tiaj tus so ncaj qha rau ntawm cov ntaub so ntswg, nrog lub hauv paus dav rau kev ruaj ntseg. Qhov sib txawv tseem ceeb: 1.Kev teeb tsa: Bullhead xav tau cov rooj zaum / cov yuam sij; tiaj tus-hauv qab siv clips/spikes (ceev dua). 2.Nqi: Bullhead yog kim dua; tiaj tus- hauv qab yog pheej yig dua / ntau yam. 3.Siv: Bullhead tsis tshua muaj (cov cuab yeej cuab tam railways); tiaj tus- hauv qab (UIC 54, AREMA 115RE) ua haujlwm rau txhua txoj kab niaj hnub.
4. Txoj kev sib tsoo yog dab tsi, thiab ntau npaum li cas nws ua rau CRTS 300N?
Rail sib tsoo siv lub log abrasive kom du lub taub hau, tshem tawm hnav / tawg, thiab kho qhov profile. Rau CRTS 300N (350km / h rails), kev sib tsoo tshwm sim txhua 6-12 lub hlis (50-80 lab tag nrho cov tsheb khiav). High- cov kab tsheb khiav (100+ tsheb ciav hlau / hnub) xav tau 6 lub hlis ib ntus; tsawg tsis khoom kab 12 lub hlis. Kev sib tsoo meej (± 0.1mm profile kam rau ua) tswj kev sib cuag lub log, ncua kev pab cuam lub neej ntawm 15-20 txog 30-40 xyoo.
5. Rail aluminothermic vuam yog dab tsi, thiab thaum twg nws siv?
Aluminothermic welding (Thermit welding) koom nrog cov ntsia hlau siv cov tshuaj tiv thaiv (txhuas + hlau oxide) uas ua rau 2500℃cua sov, melting steel muab tub lim. Nws yog siv los kho CWR so lossis koom nrog cov ntsia hlau hauv thaj chaw deb (tsis muaj lub zog rau lub pob nyem vuam). Cov txheej txheem tsim muaj zog, seamless sib koom ua ke (lub zog tensile Ntau dua lossis sib npaug ntawm 700MPa) tau tshaj UIC 60 thiab CRTS 300N. Nws qeeb dua li lub pob nyem vuam tab sis zoo tagnrho rau kev kho thaum muaj xwm txheej ceev lossis tawm - qhov chaw kab sib chaws.