Corrosion Fatigue thiab Ntev -Technology Tiv Thaiv Lub Sij Hawm rau Fishplate Bolts
Q1: Dab tsi yog qhov tsim mechanism ntawm corrosion qaug zog ntawm ntses phaj bolts?
A1: Ntses phaj bolts dais alternating shear quab yuam thiab tensile siab tshwm sim los ntawm lub tsheb ciav hlau load tib lub sij hawm, thiab yog ua los ntawm corrosive media xws li los nag, ntsev tsuag thiab stray tam sim no. Corrosion yuav tsim micro- tawg ntawm lub ntsia liaj qhov rooj nto, thiab alternating load yuav txhawb kev nthuav dav ntawm micro- tawg, nws thiaj li ua rau bolt puas. Lub coupling nyhuv ntawm corrosion thiab qaug zog yog lub ntsiab mechanism ntawm corrosion qaug zog tsis ua hauj lwm.
Q2: Vim li cas qhov corrosion qaug zog ntawm ntses phaj bolts hnyav dua nyob rau hauv ntug dej hiav txwv?
A2: Lub siab ntsev pos huab thiab cov av noo ib puag ncig nyob rau hauv cov ntug dej hiav txwv yuav ua rau kom cov electrochemical corrosion ntawm lub ntsia liaj qhov rooj nto, tsim ib tug loj tus naj npawb ntawm corrosion pits li tawg qhov chaw; tib lub sijhawm, qhov hloov pauv kev ntxhov siab tshwm sim los ntawm siab - lub tsheb ciav hlau zaus vibration yuav nthuav dav cov kab nrib pleb sai. Piv nrog rau cov cheeb tsam hauv av, tus nqi corrosion thiab qaug zog nthuav dav ntawm bolts tau zoo heev, thiab qhov teeb meem corrosion qaug zog yog qhov tseem ceeb.
Q3: Dab tsi yog qhov txawv ntawm kev tiv thaiv kev laus ntawm kub -dip galvanizing thiab dacromet txheej rau bolt tiv thaiv?
A3: Kev tiv thaiv kev laus ntawm kub-dip galvanizing txheej yog li 5-8 xyoo, haum rau ntses phaj bolts nyob rau hauv ib puag ncig zoo tib yam; dacromet txheej tsis muaj hydrogen embrittlement kev pheej hmoo, nws cov ntsev tsuag corrosion kuj yog 3-5 npaug ntawm kub-dip galvanizing, kev tiv thaiv kev laus tuaj yeem ncav cuag ntau tshaj 10 xyoo, uas yog tsim rau bolts nyob rau hauv ib puag ncig corrosive thiab muaj peev xwm ncua qhov tshwm sim ntawm corrosion qaug zog.
Q4: Dab tsi cuam tshuam cov txheej txheem bolt installation muaj kev tiv thaiv kev tiv thaiv corrosion?
A4: Siv cov xov tshwj xeeb los tiv thaiv- cov roj xeb thaum lub sij hawm ntsia liaj qhov rooj tuaj yeem sau cov xov khoob thiab cais cov xov xwm corrosive; ncav cuag tus qauv torque tuaj yeem ua kom muaj kev sib raug zoo ntawm bolts thiab ntses daim hlau thiab txo electrochemical corrosion ntawm qhov chaw sib cuag; txhim kho elastic gaskets tuaj yeem tsis muaj kev vibration thiab txo qis kev ntxhov siab amplitude, txhim kho corrosion qaug zog tiv thaiv ntawm bolts los ntawm qhov txuas txuas.
Q5: Yuav ua li cas txhawm rau txheeb xyuas thiab kho corrosion-nqhis ntses phaj bolts hauv kev ua haujlwm thiab kev saib xyuas?
A5: Tsis tu ncua siv ultrasonic kuaj los xyuas cov kab nrib pleb ntawm bolts thiab kev tshuaj xyuas qhov muag los txiav txim qhov kev xeb ntawm qhov chaw; hloov bolts nrog corrosion pits thiab micro- tawg nyob rau hauv lub sij hawm; ntxuav lub ntsej muag ntawm me ntsis corroded bolts thiab rov siv tshuaj tiv thaiv -corrosion roj; nce qhov kev tshawb pom ntau zaus hauv cov ntug dej hiav txwv thiab cov av noo kom kwv yees qhov kev pheej hmoo ntawm corrosion qaug zog ua ntej.