Cov khoom xaiv ntawm Rail Spikes thiab kev ntseeg siab ntawm Track Anchorage
Dab tsi yog qhov ua tau zoo ntawm cov khoom siv rau lub teb chaws tus qauv rail spikes?
Cov khoom siv ntawm lub teb chaws tus qauv rail spikes yog Q235 carbon structural steel, uas muaj ib tug yield zog ntau tshaj los yog sib npaug zos rau 235MPa, zoo plasticity thiab toughness, yooj yim ua thiab tsim, thiab muaj peev xwm ua tau raws li qhov yuav tsum tau anchoring ntawm pa ceev railways. Rail spikes ua los ntawm 45 # steel muaj lub zog siab dua, nrog lub zog tensile Ntau dua lossis sib npaug li 600MPa, haum rau cov xwm txheej hnyav ntawm cov tsheb ciav hlau hnyav, tab sis lawv cov yas qis dua me ntsis ntawm Q235 steel, yog li yuav tsum tau them nyiaj mloog kom tsis txhob tawg thaum ua haujlwm. Q235 rail spikes muaj tus nqi qis thiab tus nqi siab ua haujlwm, haum rau loj - nplai tso ntawm cov pa ceev kab; 45 # steel rail spikes muaj tus nqi siab dua me ntsis tab sis pom tseeb lub zog zoo, thiab feem ntau yog siv rau hauv cov ntu tseem ceeb ntawm hnyav{11}} thauj thiab siab - kab ceev. Ob hom rail spikes yuav tsum kub-dip galvanized los tiv thaiv- kev kho corrosion, nrog zinc txheej thickness Ntau dua los yog sib npaug rau 85μm los txhim kho sab nraum zoov los tiv thaiv -corrosion peev xwm. Tsis tas li ntawd, ob hom kev tsheb ciav hlau spikes muaj kev ua haujlwm zoo vuam thiab tuaj yeem welded thiab kho raws li kev tsim kho.
Dab tsi yog qhov zoo ntawm siab - xaiv cov khoom siv kawg rau txawv teb chaws tus qauv rail spikes?
Txawv teb chaws tus qauv rail spikes feem ntau siv 304 stainless hlau, uas muaj corrosion kuj zoo heev. Nyob rau hauv ntug dej hiav txwv tshuaj tsuag ib puag ncig, tsis muaj kev tiv thaiv ntxiv - kev kho corrosion yog xav tau, thiab lub neej kev pab cuam muaj peev xwm ncav cuag ntau tshaj 20 xyoo, deb tshaj ntawm lub teb chaws tus qauv galvanized rail spikes. Cov txheej txheem txawv teb chaws rail spikes ua los ntawm cov hlau alloy, xws li 40Cr alloy steel, muaj lub zog tensile Ntau dua los yog sib npaug rau 750MPa thiab lub zog tawm los Ntau dua lossis sib npaug li 550MPa, uas yog siab dua li ntawm lub teb chaws tus qauv 45 # steel, haum rau hnyav ua hauj lwm tej yam kev mob ntawm hnyav -haul thiab siab {{10} kab. Stainless hlau rail spikes muaj ib tug du nto thiab muaj zog kev sib raug zoo nrog tus neeg sawv cev anchoring, uas tuaj yeem txhim kho kev ntseeg siab thiab tiv thaiv kev tsheb ciav hlau los ntawm loosening. Alloy steel rail spikes muaj qhov zoo sib xws ntawm lub zog thiab lub zog tom qab quenching thiab tempering tshav kub kho, thiab tsis yooj yim rau tawg nyob rau hauv kev cuam tshuam loads, kom ntseeg tau tias stability ntawm taug qab txaj anchoring. Nyob rau tib lub sijhawm, txawv teb chaws tus qauv siab -kawg cov khoom siv rail spikes muaj kev ua haujlwm ntau dua, cov xov tsis sib xws, thiab zoo dua haum nrog lub tes tsho thaum lub sijhawm teeb tsa, ntxiv kev txhim kho cov nyhuv anchoring.
Dab tsi yog cov ntsiab lus tseem ceeb ntawm kev xaiv cov khoom siv rau kev tsheb ciav hlau hauv cov ntug dej hiav txwv ntsev tsuag?
Kev xaiv cov khoom siv ntawm kev tsheb ciav hlau nyob rau hauv cov ntug dej hiav txwv ntsev tsuag yuav tsum muab qhov tseem ceeb rau cov ntsev tsuag tshuaj tiv thaiv corrosion, thiab 304 los yog 316 stainless hlau yog qhov zoo dua . 316 stainless hlau muaj ntsev tsuag tshuaj tiv thaiv zoo dua li 304, thiab zoo dua rau cov kab hauv hiav txwv nrog cov ntsev ntsev ntau dua. Yog tias cov pa roj carbon steel rail spikes raug xaiv, kev sib xyaw ua ke los tiv thaiv- txheej txheem corrosion ntawm kub-dip galvanizing + sealing txheej yuav tsum tau txais, nrog zinc txheej thickness ntau dua lossis sib npaug li 120μm. Cov txheej sealing tuaj yeem cais cov tshuaj ntsev los ntawm kev tiv tauj cov hlau substrate thiab txuas ntxiv lub neej tiv thaiv{10}} corrosion. Cov khoom siv ntawm cov ntsia hlau loj yuav tsum muaj kev ntxhov siab zoo corrosion. Cov pa roj carbon steel rail spikes yog qhov ua rau muaj kev ntxhov siab corrosion tawg nyob rau hauv ntsev tsuag ib puag ncig, thiab stainless hlau tuaj yeem zam qhov teeb meem no. Tsis tas li ntawd, lub zog ntawm cov khoom siv yuav tsum phim cov kab load. Rail spikes rau ntug hiav txwv hnyav- cov kab yuav tsum tau ua los ntawm cov hlau tsis muaj steel thiab cov hlau alloy steel sib xyaw kom sib npaug tiv thaiv corrosion thiab lub zog yuav tsum tau ua. Nyob rau tib lub sijhawm, nws yog ib qho tsim nyog yuav tsum tsis tu ncua xyuas lub xeev corrosion ntawm cov rail spikes. Rau carbon steel rail spikes, lawv yuav tsum tau hloov nyob rau hauv lub sij hawm thaum lub corrosion qhov tob tshaj 0.5 hli.
Dab tsi yog qhov yuav tsum tau xav txog hauv kev xaiv cov khoom siv ntawm kev tsheb nqaj hlau hauv thaj tsam alpine permafrost?
Cov khoom ntawm kev tsheb ciav hlau spikes nyob rau hauv alpine permafrost cheeb tsam yuav tsum muaj zoo heev low -kub tej yam toughness, thiab lub low-kub tej yam toughness tus nqi yuav tsum siab tshaj los yog sib npaug rau 27J (-40 degree) los tiv thaiv cov tsheb ciav hlau spikes los ntawm nkig tawg ntawm qis kub. Tsawg- alloy siab- lub zog steel xws li 16Mn steel yog nyiam. Cov khoom siv no tseem tuaj yeem tswj tau zoo toughness nyob rau hauv qis - qhov kub thiab txias ib puag ncig thiab muaj lub zog siab, haum rau cov kev xav tau ntawm cov cheeb tsam permafrost. Cov khoom siv rail spike yuav tsum muaj khov zoo -thaw kuj. Cov cheeb tsam Permafrost muaj qhov khov heev-thaw lub voj voog, thiab cov khoom siv yuav tsum tau tiv thaiv kev nthuav dav thiab kev sib cog lus kom tsis txhob qaug zog. Tsis tas li ntawd, qhov corrosion kuj ntawm cov khoom yuav tsum tau raws li tus qauv. Cov dej khov thiab daus nyob hauv thaj tsam alpine yuav nqa ntsev mus rau hauv lub txaj khiav. Cov rail spikes yuav tsum tau kub-dip galvanized + passivated los txhim kho corrosion kuj. Nyob rau tib lub sijhawm, cov khoom siv yuav tsum muaj kev ua haujlwm zoo. Kev tsim kho hauv thaj tsam alpine yog qhov nyuaj, thiab cov rail spikes yuav tsum yooj yim rau nruab thiab thauj tog rau nkoj kom tsis txhob muaj teeb meem kev tsim kho los ntawm cov ntaub ntawv nyuaj heev.
Yuav ua li cas txheeb xyuas seb qhov kev ua tau zoo ntawm cov khoom siv rail spike ua tau raws li tus qauv?
Lub tshuab ntsuas universal yuav tsum tau siv los kuaj xyuas lub zog tensile thiab lub zog tawm los ntawm cov khoom siv rail spike. Cov qauv tensile qauv yog tsim rau kev kuaj, tensile xeem yog nqa tawm, lub siab tshaj plaws load ntawm tawg yog sau tseg, lub tensile zog thiab yield zog yog xam, thiab nws yog txiav txim seb lawv ua tau raws li tus qauv tsim. Tsawg- qhov ntsuas kub ntawm qhov ntsuas qhov hnyav yuav tsum tau siv lub tshuab ntsuas qhov cuam tshuam los ua qhov kev sim cuam tshuam ntawm cov qauv hauv qhov qis - qhov kub thiab txias ntawm -40 degree, ntsuas qhov cuam tshuam lub zog nqus, thiab xyuas kom meej tias nws loj dua lossis sib npaug ntawm 27J. Corrosion resistance detection tuaj yeem txais kev kuaj tshuaj ntsev nruab nrab. Muab cov qauv kev tsheb ciav hlau tso rau hauv chav dej ntsev tsuag, tshuaj tsuag tsis tu ncua rau 1000 teev, thiab saib xyuas qhov corrosion ntawm qhov chaw. Stainless hlau rail spikes yuav tsum tsis muaj qhov pom tseeb corrosion, thiab thaj tsam corrosion ntawm carbon steel rail spikes yuav tsum tsawg dua los yog sib npaug li 5%. Kev tshawb nrhiav tshuaj muaj pes tsawg leeg ntawm cov khoom yuav tsum tau siv lub spectrum analyzer txhawm rau txheeb xyuas cov ntsiab lus ntawm carbon, manganese, chromium thiab lwm yam khoom kom ua tau raws li cov qauv khoom. Tsis tas li ntawd, ntawm - qhov chaw anchoring rub-out tests tuaj yeem ua tiav los kuaj xyuas lub zog anchoring ntawm txoj kev tsheb ciav hlau thiab xyuas qhov sib txuam ntawm cov khoom siv zog thiab cov txheej txheem anchoring.