Hauv kev lag luam niaj hnub,ductile hlau kavyog dav siv nyob rau hauv dej, kua, kis tau tus mob thiab ntau lwm yam teb vim lawv zoo heev kev ua tau zoo. Txhawm rau kom nkag siab tob txog qhov ua tau zoo ntawm cov kav hlau kav hlau, daim duab metallographic ntawm cov kav hlau kav hlau ua lub luag haujlwm tseem ceeb. Niaj hnub no, peb yuav tham txog lub luag hauj lwm ntawm metallographic daim duab ntawm ductile hlau kav nyob rau hauv qhov tob, thiab tsom mus rau kev soj ntsuam tus nqi zoo heev coj los ntawm.DINSENductile hlau kav mus txog qib 1 spheroidization tus nqi. Cov duab hauv qab no yog ib daim duab ntawm daim duab metallographic ntawm DINSEN ductile hlau kav.
Hauv cov ntsiab lus yooj yim, cov duab kos duab metallographic yog cov duab ntawm cov qauv sab hauv ntawm cov hlau pom los ntawm metallographic microscopes thiab lwm yam khoom siv tom qab kev npaj tshwj xeeb ntawm cov khoom siv hlau. Rau cov kav hlau kav hlau, lawv cov duab kos duab qhia cov ntaub ntawv tseem ceeb xws li lub xeev kev faib khoom, cov yam ntxwv zoo thiab qib ntawm spheroidization ntawm cov hlau hlau hauv cov hlau cam matrix. Thaum npaj cov qauv metallographic, yuav tsum muaj cov txheej txheem ua haujlwm zoo xws li txiav, sib tsoo, polishing thiab corrosion. Txiav yuav tsum xyuas kom meej tias cov qauv xaiv tuaj yeem sawv cev rau cov yam ntxwv ntawm tag nrho cov yeeb nkab; cov txheej txheem sib tsoo maj mam tshem tawm qhov kev puas tsuaj los ntawm kev txiav, kom lub ntsej muag flatness ua tau raws li qee qhov yuav tsum tau ua; polishing ntxiv ua rau cov qauv saum npoo du zoo li daim iav, kom cov qauv sab hauv tuaj yeem pom meej meej tom qab kev kho corrosion; corrosion yog siv cov tshuaj reagents los teb cov qauv hlau sib txawv rau cov qib sib txawv, thiaj li nthuav tawm qhov sib txawv ntawm cov qauv hauv lub tshuab tsom. Los ntawm cov kev ua haujlwm no, peb tuaj yeem tau txais daim duab kos duab metallographic uas tuaj yeem cuam tshuam qhov microstructure ntawm cov kav hlau kav hlau.
Kev tshawb nrhiav cov khoom siv:Kev ua tau zoo ntawm cov kav hlau hlau txuas txuas nrog rau lub xeev ntawm graphite nodules. Los ntawm daim duab metallographic, peb tuaj yeem pom qhov loj, tus lej thiab kev faib tawm ntawm graphite nodules. Qhov loj ntawm graphite nodules ncaj qha cuam tshuam rau cov khoom siv ntawm cov hlau cam khwb cia. Cov me me thiab sib npaug ntawm cov graphite nodules tuaj yeem txhim kho lub zog thiab tawv tawv ntawm cov hlau cam khwb cia. Piv txwv li, thaum cov graphite nodules me me thiab sib npaug sib npaug, lawv tuaj yeem cuam tshuam kev ntxhov siab ntau dua thiab txo cov kev ntxhov siab thaum raug rau sab nraud quab yuam, kom cov kav hlau txuas tau zoo dua compression thiab tensile zog. Daim duab metallographic zoo li phau ntawv code ntawm cov khoom siv. Los ntawm kev txhais nws, cov kws tshawb fawb tuaj yeem nkag siab tob txog kev sib raug zoo ntawm cov qauv sab hauv thiab cov khoom ntawm cov khoom, thiab muab lub hauv paus rau kev txhim kho cov khoom zoo ntawm cov yeeb nkab hlau.
Kev tswj kom zoo:Nyob rau hauv cov txheej txheem ntawm cov kav hlau kav hlau, cov duab kos duab metallographic yog ib qho tseem ceeb ntawm kev tswj kom zoo. Txhua batch ntawm ductile hlau kav tsim yuav tsum tau kuaj metallographically. Los ntawm kev sib piv daim duab metallographic nrog tus qauv atlas, nws tuaj yeem txiav txim siab seb cov khoom puas ua tau raws li cov qauv zoo. Yog hais tias daim duab metallographic qhia tau hais tias lub spheroidization ntawm graphite npas yog pluag, xws li ib tug loj npaum li cas ntawm flake graphite los yog tsawg heev spheroidization tus nqi, kev ua tau zoo ntawm cov batch ntawm cov khoom yuav tsis ua tau raws li qhov yuav tsum tau. Rau cov tuam txhab tsim khoom, kev tshawb nrhiav raws sij hawm ntawm cov teeb meem zoo li no tuaj yeem tiv thaiv cov khoom tsis tsim nyog los ntawm kev nkag mus rau hauv kev lag luam thiab txo qis kev lag luam. Nws kuj pab txhim kho cov txheej txheem ntau lawm thiab txhim kho cov khoom lag luam kom ruaj khov.
Failure analysis:Thaum cov kav hlau kav hlau tsis ua haujlwm lossis tsis ua haujlwm thaum siv, cov duab kos duab metallographic tuaj yeem muab cov ntsiab lus tseem ceeb txhawm rau txhawm rau paub qhov ua rau tsis ua haujlwm. Piv txwv li, yog hais tias ib tug pipeline ruptures, los ntawm kev soj ntsuam cov metallographic daim duab nyob ze ntawm lub ruptured ib feem, nws yuav pom tau hais tias spheroidization tus nqi ntawm cov graphite nodules txo, uas ua rau txo cov khoom toughness thiab nkig tawg nyob rau hauv lub sij hawm ntev sab nraud quab yuam; los yog vim impurities los yog tsis xws luag nyob rau hauv cov qauv, corrosion yog tshwm sim nyob rau hauv tej yam kev mob, uas nws thiaj li ua rau pipeline tsis ua hauj lwm. Tom qab qhov ua tsis tiav yog qhia meej los ntawm kev txheeb xyuas metallographic, cov phiaj xwm kev txhim kho tuaj yeem ua tau, xws li kev ua kom zoo ntawm cov txheej txheem tsim khoom, kho cov qauv raw khoom, thiab lwm yam, txhawm rau txhim kho lub neej kev pab cuam thiab kev ntseeg siab ntawm cov kav hlau kav hlau.
Spheroidization tus nqi yog qhov taw qhia tseem ceeb rau kev ntsuas qhov zoo ntawm cov kav dej hlau. Nws qhia txog qib ntawm graphite spheroidization. Qhov siab dua qhov spheroidization tus nqi, qhov ze dua cov duab ntawm cov graphite nodules yog mus rau ib tug zoo meej sphere thiab qhov sib txawv ntau qhov kev faib tawm. Raws li cov qauv tsim, tus nqi spheroidization feem ntau yog muab faib ua ntau theem, feem ntau ntawm qib 1 txog qib 6, qib 1 muaj qhov siab tshaj plaws spheroidization tus nqi thiab qib 6 muaj qhov qis tshaj spheroidization.
Qib 1 spheroidization tus nqi: Rau cov kav hlau hlau uas mus txog qib 1 spheroidization tus nqi, cov graphite nodules nyob rau hauv yuav luag txhua tus kheej kheej kheej kheej, zoo li qhov loj me, thiab sib faib ntau thiab sib npaug. Qhov zoo tshaj plaws microstructure no muab cov kav hlau kav hlau zoo heev rau txhua yam khoom. Nyob rau hauv cov nqe lus ntawm lub zog, nws muaj peev xwm tiv taus siab dua, thiab muaj peev xwm tswj tau ib tug ruaj khov qauv txawm hais tias nws yog tob faus rau hauv av kom tiv taus av siab los yog thaum conveying high-pressure kua. Nyob rau hauv cov nqe lus ntawm toughness, ductile hlau kav nrog ib tug spheroidization tus nqi ntawm 1 muaj kev cuam tshuam zoo heev. Txawm hais tias nyob rau hauv cov xwm txheej geological nyuaj, xws li thaj chaw av qeeg, lawv tuaj yeem tiv taus qhov cuam tshuam ntawm cov xwm txheej xws li kev hloov hauv av, zoo heev txo txoj kev pheej hmoo ntawm cov kav xa dej. Nyob rau tib lub sijhawm, tus nqi zoo spheroidization kuj tseem pab txhim kho corrosion kuj ntawm cov yeeb nkab, vim tias cov khoom sib txawv ntawm cov graphite yuav txo cov electrochemical corrosion los ntawm microstructural sib txawv.
Qhov cuam tshuam ntawm ntau theem ntawm spheroidization tus nqi ntawm kev ua haujlwm:Raws li spheroidization tus nqi txo qis, cov duab ntawm cov pob graphite maj mam deviates los ntawm cov duab kheej kheej, thiab ntau dua elliptical, worm-zoo li thiab txawm flake graphite tshwm. Cov graphite tsis zoo li no yuav tsim cov ntsiab lus kev ntxhov siab hauv cov khoom, txo lub zog thiab toughness ntawm cov khoom. Piv txwv li, cov khoom graphite ntawm cov kav hlau txuas nrog lub spheroidization tus nqi ntawm 3 tsis zoo li cov qib 1, thiab kev faib tawm kuj tsis sib xws. Thaum raug tib lub siab, lawv feem ntau yuav raug deformed hauv zos los yog ruptured. Nyob rau hauv cov nqe lus ntawm corrosion kuj, cov kav dej nrog qis spheroidization tus nqi yog ntau raug rau electrochemical corrosion vim tsis sib xws microstructure, yog li shortening cov kev pab cuam lub neej ntawm cov yeeb nkab.
Zoo heev mechanical zog:DINSEN ductile hlau kav dej muaj zog heev thiab toughness vim lawv qib 1 spheroidization tus nqi. Hauv cov dej num, lawv tuaj yeem tiv taus dej siab, ua kom cov dej ruaj khov, thiab txo qhov tshwm sim ntawm cov yeeb nkab tawg. Nyob rau hauv cov kav dej, ntsib cov kev xav tau tam sim no high-flow ntws nyob rau hauv huab cua huab cua xws li los nag hnyav, lawv lub zog siab thiab zoo toughness tuaj yeem ua kom ntseeg tau tias cov kav dej tsis raug puas tsuaj los ntawm cov dej ntws. Hauv kev sib kis ntawm cov pa roj, kev sib kis ntawm cov pa hluav taws xob siab yuav tsum muaj lub zog loj heev. Qib 1 spheroidization tus nqi ntawm DINSEN ductile hlau kav ua rau nws muaj peev xwm ua haujlwm tau zoo, ua kom muaj kev nyab xeeb thiab txhim khu kev qha.
Lub neej ua haujlwm ntev:Cov qauv microstructure coj los ntawm qib 1 spheroidization tus nqi zoo heev txhim kho corrosion kuj ntawm DINSEN ductile hlau kav. Txawm hais tias nyob rau hauv ib puag ncig hauv av los yog hauv cov dej khib nyiab uas muaj cov xov xwm corrosive, nws cov kev tiv thaiv corrosion yog qhov zoo tshaj plaws rau cov kav dej nrog qis dua spheroidization. Qhov no txhais tau hais tias thaum lub sij hawm siv DINSEN ductile hlau kav, phab ntsa thickness ntawm cov yeeb nkab yuav txo qis, thiab nws muaj peev xwm tuav tau zoo nyob rau lub sij hawm ntev, zoo heev expanding cov kev pab cuam lub neej ntawm cov yeeb nkab thiab txo cov nqi hloov thiab txij nkawm.
Kev siv dav dav adaptability:Vim nws txoj kev ua tau zoo heev, DINSEN cov kav hlau hlau tuaj yeem hloov mus rau ntau qhov chaw ua haujlwm engineering thiab cov ntawv thov. Txawm hais tias nyob rau hauv cov cheeb tsam txias sab qaum teb, nws tiv nrog lub siab los ntawm kev nthuav dav ntawm cov dej khov hauv cov yeeb nkab thaum lub caij ntuj no, los yog nyob rau hauv cov cheeb tsam kub thiab los nag, nws tiv thaiv corrosion nyob rau hauv qhov chaw ntub dej. Nws ua tau zoo nyob rau hauv kev tsim kho hauv nroog infrastructure, industrial engineering thiab kev ua liaj ua teb irrigation, thiab muab cov kev daws teeb meem txhim khu kev qha rau kev txhim kho cov kev lag luam sib txawv.
Hauv cov ntsiab lus, daim duab metallographic ntawm cov kav hlau kav hlau ua lub luag haujlwm tsis tuaj yeem hloov pauv hauv kev tshawb fawb cov ntaub ntawv, kev tswj kom zoo thiab kev soj ntsuam tsis ua haujlwm. Qib spheroidization tus nqi, tshwj xeeb tshaj yog qib 1 spheroidization tus nqi ua tiav los ntawm DINSEN cov kav hlau hlau, yog qhov tseem ceeb rau kev txhim kho kev ua haujlwm ntawm cov kav hlau kav, txuas ntxiv lawv lub neej kev pab cuam thiab ua tau raws li ntau yam kev xav tau ntawm daim ntawv thov. Los ntawm kev nkag siab tob ntawm cov duab kos duab theem thiab spheroidization tus nqi, peb tuaj yeem nkag siab zoo dua cov kav hlau hlau, cov khoom siv tseem ceeb, thiab muab kev ua si tag nrho rau lawv qhov zoo hauv kev siv tswv yim.
Post lub sij hawm: Mar-21-2025
