Hlau fiber ntau yog qhov tshiab, kev ua haujlwm siab steel fiber ntau ntau. Kev sib xyaw qauv tsim qauv ntawm txoj kev steel fiber ntau yog qhov zoo ib yam li cov pob zeb zoo tib yam, tab sis qhov sib txawv yog: ob chav tswj lub zog qauv (compressive zog thiab flexural tensile zog); steel fiber cov ntsiab lus yog txiav txim raws li lub flexural thiab tensile lub zog yuav tsum tau los ntawm tus tsim; unit dej noj thiab xuab zeb Tus nqi muaj feem xyuam rau cov fiber ntau ntxiv. Rau txhua txhua 0.5 feem pua (ntau npaum li cas) steel fiber ntau ntxiv, chav dej haus tau nce 6kg.
Hlau fiber ntau pob zeb muaj qhov sib xyaw ua ke, kev ua haujlwm thiab kev tsim kho kev ua haujlwm zoo li cov pob zeb zoo tib yam. Cov fiber ntau yuav tsis tsim cov pob hauv pob zeb thiab sib faib sib npaug. Nws tuaj yeem tsim nyob rau hauv kev lag luam pob zeb sib xyaw cov nroj tsuag thiab tuaj yeem siv rau kev tsim khoom siv. Kev poob qis thaum ntxov ntawm milled steel fiber reinforced pob zeb yog qhov loj dua, nrog kev poob ntawm 32 feem pua hauv 30 feeb thiab poob ntawm 42 feem pua hauv 2 teev. Qhov tseeb ua hauj lwm ntawm steel fiber reinforced qhob yog zoo dua li ntawm cov pob zeb zoo tib yam nrog tib qhov slump. Piv nrog rau cov pob zeb zoo tib yam, steel fiber reinforced pob zeb muaj cov khoom zoo. Piv nrog rau cov pob zeb zoo tib yam, nws lub zog compressive yog nce los ntawm 2-20 feem pua ; flexural tensile lub zog yog nce los ntawm 20-50 feem pua ; splitting tensile lub zog yog nce los ntawm 20-40 feem pua ; hnav tsis kam yog nce los ntawm 40 feem pua, nws lub cev thiab txhua yam khoom muaj peev xwm ua tau raws li cov kev qhia ntawm lub nroog txoj kev engineering thiab tshuaj xyuas manhole npog thiab lwm yam kev txhawb nqa. Qhov ntxhib thiab huv si ntawm steel fibers tuaj yeem ua ke nrog cov cement muab tshuaj txhuam hauv cov pob zeb, uas yog qhov laj thawj tseem ceeb rau milling steel fibers los txhim kho ntau yam khoom ntawm pob zeb.
Tsis tas li ntawd, high-strength steel brazing qhob tau dav siv nyob rau hauv railway sleeper prefabrication, txoj kev loj expansion pob qij txha, cement qhob pavement thiab lwm yam prefabrication, cam khwb cia-nyob rau hauv-qhov chaw, ntau lawm thiab kev tsim kho, thiab lwm yam. txiaj ntsig.
A. Adhesion
Txij li kev sib txuas ntawm cov hlau fiber ntau thiab cov pob zeb ua vaj tse yog lub cev, uas yog, kev sib kis ntawm kev sib txhuam shear quab yuam yog qhov tseem ceeb, yog li rau cov hlau fiber ntau nws tus kheej, kev sib koom ua ke yuav tsum tau txhim kho los ntawm ob qho tib si ntawm fiber ntau thiab fiber ntau. . Muaj plaub txoj hauv kev tshwj xeeb hauv qab no.
1. Qhov saum npoo ntawm cov hlau fiber ntau yog roughened thiab ntu ntu tsis sib xws. Lub hom phiaj no tuaj yeem ua tiav los ntawm kev siv cov txheej txheem melting thiab extraction. Thaum cov hlau fiber ntau yog txias txias hauv huab cua, qhov saum npoo shrinks unevenly thiab ua ntxhib, thiab tus ntoo khaub lig-section kuj shrinks mus rau hauv ib tug crescent duab, ua rau kev sib cuag nrog lub matrix.
Tiv tauj cheeb tsam.
⒉ Cov fibers yog plastically ua tiav ntawm ib qho kev ncua deb ntawm lub axis ntawm steel fiber. Piv txwv li, "Xinke" steel fiber ntawm Nyiv Kobe Steel Corporation's "XOREX" steel fibers ntawm Leibang Corporation ntawm Tebchaws Meskas (Daim duab 2-1, c) thiab "S-2" thiab "S--3" steel fibers ntawm Qing'an Iron thiab Steel Plant steel fibers. Txij li qhov saum npoo yog nias rau hauv cov duab prismatic, los yog nias rau hauv cov duab yoj, lub zog sib txuas ua ke tau nce.
3. Puab qhov kawg ntawm cov hlau fiber ntau. Lub "DRAM Ⅸ" steel fibers ntawm Becker Gongdian nyob rau hauv lub tebchaws United States (Daim duab. 2-1, e) thiab "S-4" thiab as-so steel fibers ntawm Qing'an Hlau thiab Steel Cog yog ua los ntawm hooks ntawm ob hnub. Kuj tseem muaj lub taub hau loj steel fiber ntau muab rho tawm los ntawm cov txheej txheem melting thiab cov twj tso kua mis txhim kho qhov rub tawm tsis kam vim yog cov nyhuv anchoring ntawm ob qho kawg.
⒋ Qhov saum npoo ntawm cov hlau fiber ntau yog coated nrog epoxy resin thiab saum npoo yog micro-rusted. Txoj kev no tsis txhim kho cov kev sib raug zoo ntawm kev sib raug zoo ntau npaum li cov txheej txheem dhau los, tab sis nws kuj muaj qee yam cuam tshuam.
Cov kev ntsuam xyuas ntawm Ichifu Kobayashi, University of Liege hauv Belgium, thiab Zhang Wengang tau ua pov thawj tias cov nyhuv ntawm steel fibers nrog hooks yog li ob zaug siab li ntawm cov hlau ncaj. ntawm steel fibers. Cov khoom tshwj xeeb zoo li steel fibers tsis tsuas yog txhim kho lub zog ntawm cov hlau fibers, tab sis kuj txhim kho lub toughness. Txawm hais tias cov corrugated steel fiber ntau muaj kev cuam tshuam me ntsis rau kev txhim kho lub zog ntawm steel fiber reinforced pob zeb, nws tuaj yeem ua ob npaug rau qhov toughness.
B: Hardness
Tsis muaj teeb meem dab tsi ua cov txheej txheem yog tsim, cov hlau fiber ntau yuav ntsib cov cua kub thiab txias ceev thaum lub sij hawm ua, uas yog sib npaug rau lub xeev quenching. Yog li ntawd, qhov hardness ntawm steel fibers yog siab dua. Khoov tsis tshua muaj tshwm sim thaum sib tov rau pob zeb ua kom muaj zog. Yog tias cov hlau fiber ntau nyuaj thiab nkig, nws yooj yim tawg thaum nplawm. Thaum cov hlau fiber ntau yog tsim los ntawm melting thiab siv txoj kev, cov hlau fiber ntau centrifugally ejected los ntawm melting thiab siv lub log yog tseem nyob rau hauv lub kub kub lub xeev, thiab dispersed thiab txias los ntawm ib tug roller lossis vibration conveying txoj kev. Txwv tsis pub, cov hlau fibers yuav sib sau ua ke, thiab cov cua sov yuav nyuaj rau dissipate, uas yuav ua si lub luag hauj lwm ntawm annealing.
C: Corrosion kuj
Kev taw qhia txog kev ntsuas kev tiv thaiv corrosion ntawm steel fiber reinforced qhob qhia tau hais tias cov tawg steel fiber reinforced qhob Cheebtsam nyob rau hauv ib qho chaw ntub dej, cov pob zeb ntawm qhov tawg yog carbonized, steel fiber nyob rau hauv carbonized cheeb tsam yog corroded, thiab cov carbonization qhov tob thiab corrosion degree tsim nrog lub sij hawm. Rau kev ua vaj tse, nws tsuas yog siv cov post-crack radian thiab post-crack toughness. Txawm hais tias qhov tawg qhov dav me dua li ntawm cov pob zeb ua kom muaj zog, muaj cov kab nrib pleb tom qab tag nrho. Yog li ntawd, kev tiv thaiv corrosion yuav tsum tau ua rau steel fiber reinforced pob zeb siv nyob rau hauv ib qho chaw ntub dej, tshwj xeeb tshaj yog nyob rau hauv seaside. ntsuas. Kev ntsuam xyuas lub ntsej muag ua pov thawj tias, ntawm lub hauv paus ntawm kev ua kom ntseeg tau tias cov hlau fiber reinforced pob zeb muaj peev xwm zoo ib yam, kev siv cov hlau fibers nrog cov kab loj tuaj yeem txhim kho corrosion, thiab kev siv cov epoxy resin-coated los yog galvanized steel fibers yuav txhim kho corrosion kuj. Yog tias kev tsim kho tshuab tso cai, cov hlau fiber ntau no tuaj yeem siv rau ntawm cov pob zeb ua haujlwm nkaus xwb 1-2cm, thiab yog tias tsim nyog, cov hlau tsis muaj hlau kuj tseem siv tau.
