Ujantshi wensimbi uhlukaniswe ngojantshi wesitimela, ojantshi abalula, ama-conductive rails nama-crane rails.Umumo we-cross-section kajantshi wakhiwe ingxenye emise okwe-I esebenza kahle kakhulu ukugoba, ikhanda likaloliwe, ukhalo lukaloliwe kanye nezansi kaloliwe.
(1) ujantshi wensimbi wesitimela
Izinsimbi zensimbi eziphansi ze-alloy zithuthukiswa ngesisekelo se-carbon rails.Isitimela esine-carbon ephezulu ne-low alloy steel sinamandla aphakeme, ukumelana nokugqokwa okungcono, ukumelana nengcindezi, ukumelana nokuqhekeka kwe-brittle kanye nokumelana nokuqhekeka kokukhathala kunojantshi we-carbon.Izinhlobo zezitimela ezisetshenziswa ujantshi zingama-38, 43, 50, 60 kanye no-75kg/m, njll. Kufanele kuqashelwe ngokukhethekile ukuze kuvinjelwe amabala amhlophe ngesikhathi sokukhiqiza ujantshi.
(2) Isitimela sensimbi esilula
Isetshenziswa kakhulu ezimayini namahlathi, futhi izinhlobo zayo ziyi-5,8,11,15,18 kanye ne-24 kg/m.Umzila wensimbi okhanyayo wenziwa ikakhulukazi nge-carbon steel, kanti ezimbalwa zenziwe ngensimbi ephansi ye-alloy.Izinsimbi zensimbi ezilula ezisetshenziswa ezimayini, ezindaweni ezingaphansi komhlaba nezamahlathi zidinga ukumelana nokugqwala, ngakho-ke izakhi ze-alloy ezifanele njengethusi, i-chromium, i-phosphorus ne-vanadium zengezwa ensimbi.
(3) Umzila wensimbi oconductive
Isitimela sensimbi esisetshenziselwa ukuqhuba ugesi kusitimela esingaphansi komhlaba sidinga ukuqhutshwa okuhle, okungukuthi, ukumelana no-15℃ kungaphansi kuka-0.125 μ ω m.Yenziwe ngensimbi ebulewe yekhwalithi ephezulu enekhabhoni ephansi ye-aluminium.
(4) Isitimela se-Crane steel
Ukwakheka kwamakhemikhali kanye nenqubo yokukhiqiza yezinsimbi ezikhethekile zensimbi eziphambanayo ezisetshenziselwa ama-crane guide rails ayafana nalawo wezitimela zensimbi.Izinhlobonhlobo ziyi-QU70, QU80, QUl00, QUl20 njalonjalo