Dab tsi Anti-Loosing txhais tau tias nyob rau hauv Rail Fastening System
Nyob rau hauv ib tug railway fastening system, loosening tsis yog ib qho teeb meem xov xwb. Lub kaw lus nyob twj ywm nruj thaum lub clip tuav nws cov tsim clamping quab yuam ntawm lub tsheb ciav hlau ko taw, thaum lub ntsia liaj qhov rooj los yog lub xub pwg tuav nws preload, thiab thaum tsis muaj ib feem los yog tawg. Anti-loosing engineering yog li no suav nrog kev xaiv cov khoom siv, kev kho cua sov, kev teeb tsa lub zog, kev tiv thaiv corrosion thiab ncua sij hawm rov- tshuaj xyuas. Lub clamping quab yuam yog ib qho ntsuas ntsuas ntawm qhov system tseem ua nws txoj haujlwm zoo npaum li cas, thiab nws raug txheeb xyuas los ntawm cov kev sim xws li EN 13146-7 clamping force ntsuas.
Khoom siv: 60Si2MnA Caij nplooj ntoos hlav hlau
Feem ntau Suav elastic clips yog ua los ntawm 60Si2MnA, nws muaj pes tsawg leeg ib GB / T 1222 ncaj qha tswj kev qaug zog:
| Element | Ntau yam ntawm GB / T 1222 | Lub luag haujlwm hauv kev ua haujlwm clip |
|---|---|---|
| Cov pa roj carbon (C) | 0.56-0.64% | Lub zog thiab hardness; tsawg dhau ua rau cov yas deformation, siab dhau ua rau brittleness |
| Silicon (Si) | 1.50-2.00% | Cov khoom tseem ceeb- kev daws teeb meem, nce elastic txwv; saum 2.00% weldability poob |
| Manganese (Mn) | 0.60-0.90% | Grain refinement thiab hardenability, uniform mechanical zog |
| Sulfur / phosphorus | Tsis pub tshaj 0.025% txhua | Cov impurities; tshaj cov ntaub ntawv brittle inclusions uas noob qaug zog tawg |
Qhov sib npaug ntawm lub zog thiab qhov hnyav hauv qib no yog vim li cas nws hloov cov pa roj carbon steel rau cov clips: nws tuaj yeem raug deflected ntau zaus yam tsis muaj kev teeb tsa tas mus li, tseem tiv thaiv kev tawg tawm ib zaug ib zaug micro- cov ntaub ntawv tawg.
Kev kho cua sov Windows
Txoj kev txheem yog quenching ua raws li nruab nrab -kub tempering. quenching kub yog nyob ze 850-880 C; Tshaj li 880 C coarsens lub austenite nplej thiab txo qhov cuam tshuam toughness, thaum kub qis dhau qhov clip hauv qab-hardened. Soaking lub sij hawm yuav tsum ntev txaus los ua kom tiav transformation tab sis luv txaus kom tsis txhob decarburization ntawm nto. Lub quench nruab nrab thiab nws cov cua txias ntsuas tus qauv: txias qeeb heev ua pearlite los yog troostite nrog tsis zoo elasticity, thaum txias ceev heev txaus ntshai quench cracks uas loj hlob sai nyob rau hauv kev pab cuam. Tempering yog tom qab ntawd ua tiav ntawm 420-480 C: qis dua 420 C sab hauv kev ntxhov siab nyob twj ywm siab thiab cov clip yog nkig, siab tshaj 480 C hardness ntog thiab clamping quab yuam attenuates sai sai nyob rau hauv load. Tom qab tempering, lub clip yuav tsum ncav cuag ib tug hardness ntawm HRC 40-47 nrog lub caij nplooj ntoos hlav steel microstructure uas ua rau ob qho tib si elastic rov qab thiab toughness.
Clamping Force Requirements los ntawm kab hom
Cov xwm txheej sib txawv xav tau kev sib txawv clamping quab yuam, thiab qhia tib lub clip nyob txhua qhov chaw ua rau xoob khiav lossis nrawm hnav:
| Hom kab | Hom ceev / qag load | Hom clip hom | Clamping quab yuam |
|---|---|---|---|
| High - tsheb ciav hlau ceev | 300-350 km / h | Hom III (W2-type) | Tsis pub tsawg tshaj 13 kN |
| Kab lig kev cai | 80-160 km / h, mus txog 21 t qag | Hom II | 8-10 KN |
| Heavy-kab kab | Axle load tshaj 27 t, mus txog 30 t | Heavy-hloov tshwj xeeb clip | Tsis pub tsawg tshaj 18 kN |
Kev ua haujlwm siab -kev ua haujlwm ceev ua rau siab -frequency dynamic log-rail loads, yog li cov clip yuav tsum tuav lub tsheb ciav hlau tawm tsam qhov ntev thiab sab nraud yam tsis muaj slack. Hnyav- cov kab tsheb thauj khoom ua kom muaj zog traction loj thiab cuam tshuam rau sab, yog li qhov xav tau clamping quab yuam yog siab tshaj. Cov kab ib txwm xav tau tsuas yog muaj zog txaus rau kev tswj hwm kev tsheb ciav hlau; quab yuam ntau dhau muaj nce tsheb ciav hlau ko taw thiab clip hnav yam tsis muaj txiaj ntsig.
Clamping Force Attenuation: Ua rau thiab Saib Xyuas
Clamping quab yuam decays rau plaub yog vim li cas. Cov khoom siv qaug zog yog qhov tseem ceeb: cyclic kev nyuaj siab ua rau cov yas tsub zuj zuj tshaj qhov qaug zog, txo cov elastic rov qab. Elastic so maj mam tso cov kev ntxhov siab sab hauv lub sijhawm, thiab nws nrawm ntawm qhov kub siab vim tias atomic diffusion nrawm dua. Corrosion thiab hnav shrink lub clip seem thiab roughen cov chaw tiv tauj, feem ntau hnyav nyob rau hauv cov av noo, ntug hiav txwv dej los yog chemically polluted cheeb tsam. Kev teeb tsa tsis zoo, xws li tsis zoo ntawm cov ntiv taw ntiv taw thiab cov kab tsheb ciav hlau cov kab nrib pleb lossis lub zog tsis txaus, ua rau muaj kev ntxhov siab tsis sib xws thiab kev qaug zog hauv zos ntxov ntxov. Rau kev saib xyuas, kev ntsuas kev ntxhov siab ultrasonic tuaj yeem taug qab qhov kev ntxhov siab ntawm lub clip ncaj qha, kev hloov pauv sensors ntawm txoj kev tsheb ciav hlau txheeb ze rau tus chij pw tsaug zog poob ntawm kev tswj hwm, thiab kev soj ntsuam geometry catches qhov ntsuas qhov tshwm sim thiab kev hloov pauv hloov. Kev tswj xyuas pib ntawm kev yuav khoom: lub caij nplooj ntoos hlav hlau tsim nyog, kho kom zoo thaum tshav kub kub, txhim kho lub zog kom raug, thiab tiv thaiv- corrosion coated clips nyob rau hauv ib puag ncig aggression, ua raws li teem tseg re- torque thiab hloov cov clips tsis muaj zog.
Nto Corrosion Protection
Clip corrosion tiv thaiv yog xaiv los ntawm ib puag ncig. Kub-dip zinc tsim ib txheej 50-80 micrometer zinc txheej, yog tus nqi qis thiab muab lub neej ntev nyob rau hauv cov av qhuav, tab sis nyob rau hauv ntug dej hiav txwv ntsev tsuag cov zinc txheej corrodes electrochemically thiab nws lub neej poob. zinc flake txheej (zinc-aluminium lamellar txheej) yog 5-10 micrometers tuab, dhau cov tshuaj tsuag ntsev saum 1000 teev, thiab haum rau cov kab ntug dej hiav txwv, av noo thiab tshuaj lom neeg; nws hardness yog tsawg, yog li tuav kev puas tsuaj yuav tsum tau zam. Zinc diffusion txheej tsim cov zinc{12}}hlau alloy txheej ntawm 10-20 micrometers nrog lub zog adhesion thiab hnav tsis kam, haum rau hnyav-haul thiab abrasive heev, ntawm tus nqi ntau dua. Zinc-aluminium coatings ntxiv txhuas rau qhov kub thiab txias thiab huab cua tsis kam thiab dhau ntsev tsuag saum 1500 teev, ua rau lawv xaiv rau alpine, qhov siab siab thiab ntug hiav txwv huab cua. Coatings yuav tsum tau xaiv ua ke nrog lub clip lub luag hauj lwm qaug zog, vim hais tias nkig los yog puas coatings ua raws li tawg nuclei.
FAQ
Q1: Lub luag haujlwm ntawm carbon hauv 60Si2MnA clip steel yog dab tsi?Carbon nruab nrab ntawm 0.56% thiab 0.64% muab cov clip nws lub zog thiab hardness; tsawg dhau los ua rau cov yas deformation nyob rau hauv cyclic kev nyuaj siab, ntau dhau ua rau brittleness thiab txo cov kab nrib pleb.
Q2: Vim li cas thiaj siab - nrawm thiab hnyav- cov kab tsheb yuav tsum tau sib txawv clamping quab yuam?High - cov kab ceev xav tau lub zog siab rau kev ruaj ntseg ntawm 300-350 km / h, thaum cov kab hnyav hnyav xav tau lub zog siab tshaj plaws los tiv thaiv traction thiab lateral rog ntawm 27-30 t qag loads; Cov kab zoo tib yam sib npaug tiv thaiv kev hnav.
Q3: Dab tsi yog qhov laj thawj tseem ceeb ntawm clamping quab yuam attenuation?Cov ntaub ntawv qaug zog, elastic so nyob rau hauv ntev -lub sij hawm kev ntxhov siab, corrosion thiab hnav nyob rau hauv ib puag ncig aggression, thiab installation tsis xws luag xws li tsis zoo groove haum los yog tsis txaus torque.
Q4: Yuav ua li cas yog clamping quab yuam attenuation saib xyuas?Ultrasonic kev ntsuas kev ntxhov siab ntawm cov clip, hloov pauv sensors ntawm kev tsheb ciav hlau thiab pw tsaug zog, thiab taug qab geometry tsis tau ua ke los txiav txim seb kev tswj hwm puas tseem txaus.
Q5: Cov txheej txheem twg yog qhov zoo tshaj plaws rau cov kab tsheb ciav hlau ntug hiav txwv?zinc flake txheej los yog zinc- txhuas txheej nrog ntsev tsuag tiv taus siab tshaj 1000-1500 teev, txij li kub-dip zinc poob cov txiaj ntsig zoo hauv qhov siab - ntsev-txhaj tshuaj ntawm ntug dej hiav txwv.