Nyob rau hauv cov txheej txheem tsim niaj hnub ntawm cov ntaub qhwv hlau manhole npog, peb tuaj yeem tsim cov hlau ductile los ntawm cam khwb cia hlau thiab forged steel, uas yog dav siv hauv kev lag luam kev lag luam niaj hnub no.Qhov tseeb, lub hauv paus ntsiab lus ntawm ductile hlau yog kom tau txais graphite nrog tib lub zoo li lub pob los ntawm cov txheej txheem ntawm spheroidization, uas zoo txhim kho kev ua tau zoo ntawm cam khwb cia hlau, tshwj xeeb tshaj yog nws plasticity thiab toughness, uas ua rau zoo dua carbon steel.Txawm li cas los xij, txhawm rau txo cov nqi, cov ntaub npog hlau manhole feem ntau yog forged siv cam khwb cia thiab forged steel.
Ductile hlau yog cov khoom siv nkig.Ua ntej, cam khwb cia hlau txhais tau tias cov ntsiab lus carbon ntau dua 2.1% (nrog cov ntsiab lus carbon ntawm 3.50-3.90% thiab cov qauv metallographic ntawm ferrite + pearlite).Yog hais tias cov ntsiab lus carbon siab, nws hardness yuav twv yuav raug siab.Thib ob, spheroidizing cov hlau nplaum txhais tau hais tias qhov loj ntawm cov hlau hais txo qis, uas yuav ua kom lub zog thiab hardness ntawm cov khoom.Yog li feem ntau hais lus, lub hardness ntawm cov hlau hlau yog siab heev (kwv yees siab dua li cov hlau zoo tib yam).
Ua ntej, cov tsheb hnyav feem ntau yog siv rau hauv txoj kev tsheb, yog li cov ductile hlau manhole npog feem ntau xaiv, uas muaj peev xwm ntawm 40 tons;Qee qhov sib xyaw manhole npog tuaj yeem ua tiav qhov muaj peev xwm ntawm 25 tons, uas yog pheej yig dua li cov hlau nplaum.Txawm li cas los xij, ductile hlau manhole npog muaj kev nyab xeeb.
Qhov thib ob, piv rau cov ntaub npog manhole, cov ntaub qhwv hlau manhole npog feem ntau yuav raug tsom los ntawm tub sab.Ductile hlau manhole npog tsis tau tsuas yog muaj peev xwm zoo load-bearing, tab sis kuj tsom rau kev tsim ntawm txhua yam ntawm cov ntaub ntawv hlau manhole npog, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm kev tiv thaiv tub sab nyiag kev ua tau zoo, tiag tiag yuam tub sab mus rau qhov chaw uas lawv tsis muaj txoj hauv kev pib. thiab tsis muaj leej twg tuaj yeem nyiag tau.Qee tus neeg yuav txhawj xeeb tias cam khwb cia hlau manhole npog tuaj yeem ua suab nrov thaum tsav tsheb dhau, uas yog qhov tsis tsim nyog vim peb twb tau txiav txim siab qhov teeb meem no hauv peb qhov tsim.Txhua lub manhole npog tau dhau los kho lub suab nrov txo ua ntej tawm hauv lub Hoobkas, tshem tawm tag nrho cov teeb meem ntawm lub suab nrov ntawm cov hlau manhole npog.
Thaum kawg, lub peev xwm load-bearing ntawm composite manhole npog yog ntau me dua li ntawm cov hlau hlau manhole npog.Rau cov chaw xws li cov siv tawv ntsuab thiab cov kev taug kev uas tsis tas yuav tsum muaj qhov tseem ceeb, tus nqi ntawm kev siv cov khoom siv manhole npog yog qis dua li ntawm kev siv cov hlua hlau manhole npog.
Post lub sij hawm: Aug-10-2023
