Evolution ntawm Railway Track Pads
Raws li lub tsheb ciav hlau ceev tau nce, tau muaj qhov sib thooj xav tau kom muaj kev ruaj ntseg ntau dua hauv kev tsheb ciav hlau, ua rau muaj kev nce qib hauv kev tsim cov tsheb ciav hlau khiav tsheb. Cov kev txhim kho no tuaj yeem muab faib ua plaub theem:
Thaum pib, steel phaj vuam pads tau siv. Txawm li cas los xij, cov ntaub qhwv no tau txwv los ntawm qhov muaj cov vuam seams, uas cuam tshuam qhov kev ncaj ncees thiab cov khoom siv ntawm cov hlau.
Tom qab ntawd, ntu forging khi daim hlau tau qhia los hloov welded backing plates. Cov forging khi daim hlau no muaj kev ncaj ncees zoo dua thiab cov khoom siv kho tshuab. Txawm li cas los xij, lawv tau kim dua thiab pheej yig dua rau corrosion.
Sij hawm dhau mus, muaj kev hloov pauv ntawm kev siv cov hlau hlau uas tsis muaj hlau, uas yog lawv cov nqi qis thiab txo deformation. Cov phiaj no muab kev daws teeb meem nyiaj txiag ntau dua yam tsis muaj kev cuam tshuam kev ua haujlwm.
Qhov kev txhim kho tshiab kawg no suav nrog kev siv cov hlua hlau khi daim hlau, uas muaj cov khoom siv zoo heev thiab cov yam ntxwv casting. Ductile hlau khi daim hlau muaj kev tiv thaiv kev vibration zoo tshaj thiab tiv thaiv kev cuam tshuam, ua rau lawv zoo tagnrho rau ntau yam kev tsheb ciav hlau.
Nyob rau hauv teb rau evolving xav tau kev pab nyob rau hauv lub railway kev lag luam, peb lub Hoobkas tau tsim ductile hlau khi daim hlau siv cov txheej txheem ntau lawm. Los ntawm kev ua haujlwm thib ob inoculation thiab tswj cov nyiaj ntawm silicon kawg, peb tau ua tiav cov ferrite nodular cam khwb cia hlau khi daim hlau uas tuaj yeem siv ncaj qha rau hauv lub xeev casting. Cov hlua khi no ua tau raws li qhov xav tau nruj ntawm kev tsim kho kev tsheb ciav hlau niaj hnub no, ua kom muaj kev ntseeg siab thiab ua haujlwm tau zoo.