Hauv kev lag luam niaj hnub no,cov kav hlau ductilesiv dav hauv kev muab dej, dej ntws, roj xa thiab ntau lwm qhov chaw vim lawv qhov kev ua tau zoo heev. Txhawm rau kom nkag siab tob txog kev ua tau zoo ntawm cov kav hlau ductile, daim duab metallographic ntawm cov kav hlau ductile ua lub luag haujlwm tseem ceeb. Niaj hnub no, peb yuav tham txog lub luag haujlwm ntawm cov duab metallographic ntawm cov kav hlau ductile tob, thiab tsom mus rau kev txheeb xyuas qhov txiaj ntsig zoo heev uas coj los ntawmDINSENCov kav hlau ductile ncav cuag theem 1 spheroidization tus nqi. Daim duab hauv qab no yog daim duab ntawm daim duab metallographic ntawm DINSEN cov kav hlau ductile.
Hauv cov lus yooj yim, cov duab kos metallographic yog cov duab ntawm cov qauv sab hauv ntawm cov hlau uas pom los ntawm cov tshuab microscopes thiab lwm yam khoom siv tom qab npaj cov qauv hlau tshwj xeeb. Rau cov kav hlau ductile, lawv cov duab kos metallographic qhia cov ntaub ntawv tseem ceeb xws li lub xeev faib tawm, cov yam ntxwv ntawm cov duab thiab qib ntawm spheroidization ntawm cov hlau ductile hauv cov hlau cam khwb cia matrix. Thaum npaj cov qauv metallographic, yuav tsum muaj ntau yam txheej txheem ua haujlwm xws li txiav, sib tsoo, polishing thiab corrosion. Kev 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 puas tsuaj ntawm qhov chaw los ntawm kev txiav, yog li ntawd qhov chaw tiaj tus ua tau raws li qee qhov yuav tsum tau ua; polishing ntxiv ua rau qhov chaw qauv du zoo li daim iav, yog li ntawd cov qauv sab hauv tuaj yeem pom tseeb tom qab kev kho corrosion tom qab; corrosion yog kev siv cov tshuaj reagents los cuam tshuam nrog cov qauv hlau sib txawv rau ntau qib sib txawv, yog li nthuav tawm qhov sib txawv meej hauv cov qauv kev teeb tsa hauv qab lub tshuab microscope. Los ntawm cov txheej txheem no, peb tuaj yeem tau txais daim duab kos metallographic uas tuaj yeem cuam tshuam qhov microstructure ntawm cov kav hlau ductile.
Kev tshawb fawb txog kev ua tau zoo ntawm cov khoom siv:Kev ua tau zoo ntawm cov kav hlau ductile muaj feem cuam tshuam nrog lub xeev ntawm cov graphite nodules. Los ntawm daim duab metallographic, peb tuaj yeem pom qhov loj me, tus lej thiab kev faib tawm ntawm cov graphite nodules. Qhov loj me ntawm cov graphite nodules cuam tshuam ncaj qha rau cov khoom siv kho tshuab ntawm cov hlau cam khwb cia. Cov graphite nodules me me thiab faib sib npaug tuaj yeem txhim kho lub zog thiab kev tawv ntawm cov hlau cam khwb cia. Piv txwv li, thaum cov graphite nodules me me thiab faib sib npaug, lawv tuaj yeem faib kev ntxhov siab ntau dua thiab txo qhov kev ntxhov siab thaum raug rau sab nraud, yog li cov kav hlau ductile muaj cov khoom sib zog thiab tensile zoo dua. 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 siv, thiab muab lub hauv paus rau kev tsim cov khoom siv hlau ductile zoo dua.
Kev tswj xyuas zoo:Hauv cov txheej txheem tsim cov kav hlau ductile, cov duab metallographic yog ib txoj hauv kev tseem ceeb ntawm kev tswj xyuas zoo. Txhua pawg ntawm cov kav hlau ductile tsim tawm yuav tsum tau kuaj metallographically. Los ntawm kev sib piv cov duab metallographic nrog cov qauv atlas, nws tuaj yeem txiav txim siab seb cov khoom puas ua tau raws li cov qauv zoo. Yog tias cov duab metallographic qhia tau tias qhov spheroidization ntawm cov pob graphite tsis zoo, xws li ntau ntawm flake graphite lossis tus nqi spheroidization qis dhau, kev ua tau zoo ntawm cov khoom lag luam yuav tsis ua tau raws li qhov xav tau. Rau cov chaw tsim khoom, kev tshawb pom cov teeb meem zoo li no tuaj yeem tiv thaiv cov khoom tsis tsim nyog los ntawm kev nkag mus rau hauv kev ua lag luam thiab txo cov kev poob nyiaj txiag. Nws kuj tseem pab txhim kho cov txheej txheem tsim khoom thiab txhim kho cov khoom zoo ruaj khov.
Kev tshuaj xyuas qhov ua tsis tiav:Thaum cov kav hlau ductile tsis ua haujlwm lossis tsis ua haujlwm thaum siv, cov duab metallographic tuaj yeem muab cov lus qhia tseem ceeb los nrhiav qhov ua rau tsis ua haujlwm. Piv txwv li, yog tias cov kav dej tawg, los ntawm kev tshuaj xyuas daim duab metallographic ze ntawm qhov tawg, nws yuav pom tias tus nqi spheroidization ntawm cov graphite nodules txo qis, ua rau cov khoom siv tawv thiab tawg brittle nyob rau hauv lub zog sab nraud ntev; lossis vim muaj cov khoom tsis huv lossis qhov tsis zoo hauv cov qauv, xeb yog tshwm sim nyob rau hauv cov xwm txheej tshwj xeeb, uas thaum kawg ua rau cov kav dej tsis ua haujlwm. Tom qab qhov ua rau tsis ua haujlwm tau meej los ntawm kev tshuaj xyuas metallographic, cov kev ntsuas txhim kho lub hom phiaj tuaj yeem ua tau, xws li kev ua kom zoo dua cov txheej txheem ntau lawm, kho cov mis ntawm cov khoom siv raw, thiab lwm yam, los txhim kho lub neej kev pabcuam thiab kev ntseeg siab ntawm cov kav hlau ductile.
Tus nqi spheroidization yog ib qho cim qhia tseem ceeb rau kev ntsuas qhov zoo ntawm cov kav dej hlau ductile. Nws qhia txog qib ntawm graphite spheroidization. Qhov siab dua ntawm tus nqi spheroidization, qhov ze dua ntawm cov duab ntawm graphite nodules yog rau lub pob kheej zoo meej thiab qhov sib npaug ntau dua qhov kev faib tawm. Raws li cov qauv cuam tshuam, tus nqi spheroidization feem ntau yog muab faib ua ntau theem, feem ntau los ntawm theem 1 txog theem 6, nrog rau theem 1 muaj tus nqi spheroidization siab tshaj plaws thiab theem 6 muaj tus nqi spheroidization qis tshaj plaws.
Qib 1 spheroidization tus nqi: Rau cov kav hlau ductile uas ncav cuag qib 1 spheroidization tus nqi, cov graphite nodules sab hauv yuav luag txhua tus zoo meej spherical, sib npaug hauv qhov loj me, thiab dispersed heev thiab faib sib npaug. Qhov microstructure zoo tagnrho no muab cov kav hlau ductile zoo heev cov khoom siv kho tshuab. Hais txog lub zog, nws tuaj yeem tiv taus siab dua, thiab tuaj yeem tswj tau cov qauv ruaj khov txawm tias nws faus tob rau hauv av kom tiv taus siab av lossis thaum xa cov kua dej siab. Hais txog kev tawv, cov kav hlau ductile nrog tus nqi spheroidization ntawm 1 muaj kev tiv thaiv zoo heev. Txawm 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 yam xws li kev hloov pauv hauv av, txo qhov kev pheej hmoo ntawm kev tawg ntawm cov kav dej. Tib lub sijhawm, tus nqi spheroidization zoo kuj pab txhim kho qhov kev tiv thaiv corrosion ntawm cov kav dej, vim tias kev faib tawm ntawm cov pob graphite txo qhov electrochemical corrosion los ntawm qhov sib txawv microstructural.
Qhov cuam tshuam ntawm ntau qib ntawm spheroidization tus nqi rau kev ua tau zoo:Thaum tus nqi spheroidization txo qis, cov duab ntawm cov pob graphite maj mam hloov pauv ntawm cov duab spheroid, thiab ntau dua elliptical, kab-zoo li thiab txawm tias flake graphite tshwm sim. Cov graphites tsis sib xws no yuav tsim cov ntsiab lus concentration kev ntxhov siab hauv cov khoom siv, txo qhov muaj zog thiab toughness ntawm cov khoom siv. Piv txwv li, cov pob graphite ntawm cov kav hlau ductile nrog tus nqi spheroidization ntawm 3 tsis yog li qub li cov ntawm theem 1, thiab qhov kev faib tawm tsis sib xws. Thaum raug rau tib lub siab, lawv yuav raug deformed hauv zos lossis txawm tias tawg. Hais txog kev tiv thaiv corrosion, cov kav dej nrog tus nqi spheroidization qis dua yuav raug rau electrochemical corrosion vim yog qhov tsis sib xws microstructure, yog li luv lub neej kev pabcuam ntawm cov kav dej.
Cov khoom siv kho tshuab zoo heev:Cov kav dej hlau DINSEN muaj zog thiab tawv heev vim lawv qib 1 spheroidization tus nqi. Hauv cov haujlwm muab dej, lawv tuaj yeem tiv taus dej siab, xyuas kom muaj dej ruaj khov, thiab txo qhov tshwm sim ntawm cov yeeb nkab tawg. Hauv cov txheej txheem dej ntws, ntsib qhov xav tau dej ntws tam sim ntawd hauv huab cua hnyav xws li nag hnyav, lawv lub zog siab thiab tawv zoo tuaj yeem ua kom cov kav dej tsis puas tsuaj los ntawm dej ntws cuam tshuam. Hauv thaj chaw xa roj, kev xa roj siab xav tau lub zog kav dej siab heev. Qib 1 spheroidization tus nqi ntawm cov kav dej hlau DINSEN ua rau nws muaj peev xwm ua tiav txoj haujlwm no, xyuas kom muaj kev nyab xeeb thiab txhim khu kev qha.
Lub neej ua haujlwm ntev:Cov qauv me me uas coj los ntawm qib 1 spheroidization tus nqi zoo heev txhim kho qhov kev tiv thaiv corrosion ntawm DINSEN ductile hlau kav. Txawm hais tias nyob rau hauv ib puag ncig hauv av noo lossis hauv qhov xwm txheej tso tawm dej khib nyiab hauv kev lag luam uas muaj cov xov xwm corrosive, nws qhov kev tiv thaiv corrosion zoo dua li cov kav dej nrog cov nqi spheroidization qis dua. Qhov no txhais tau tias thaum lub sijhawm siv DINSEN ductile hlau kav, phab ntsa tuab ntawm cov kav dej txo qis qeeb, thiab nws tuaj yeem tswj tau qhov kev ua tau zoo rau lub sijhawm ntev, ua rau lub neej kev pabcuam ntawm cov kav dej ntev dua thiab txo cov nqi hloov pauv thiab kev saib xyuas.
Kev hloov pauv tau dav dav ntawm daim ntawv thov:Vim nws muaj kev ua tau zoo heev, cov kav dej hlau DINSEN ductile tuaj yeem hloov kho rau ntau yam kev tsim kho vaj tse nyuaj thiab cov kev xav tau ntawm daim ntawv thov. Txawm hais tias nyob rau sab qaum teb txias, nws daws tau qhov siab los ntawm kev nthuav dav ntawm dej khov hauv cov yeeb nkab thaum lub caij ntuj no, lossis nyob rau sab qab teb kub thiab los nag, nws tiv taus xeb hauv cov chaw noo noo. Nws ua tau zoo hauv kev tsim kho vaj tse hauv nroog, kev tsim kho vaj tse thiab kev ua liaj ua teb, thiab muab cov kev daws teeb meem txhim khu kev qha rau kev txhim kho ntawm ntau yam kev lag luam.
Hauv kev xaus, daim duab metallographic ntawm cov kav hlau ductile ua lub luag haujlwm tseem ceeb hauv kev tshawb fawb txog cov khoom siv, kev tswj xyuas zoo thiab kev tshuaj xyuas qhov tsis ua haujlwm. Qib spheroidization tus nqi, tshwj xeeb tshaj yog qib spheroidization tus nqi ua tiav los ntawm DINSEN cov kav hlau ductile, yog qhov tseem ceeb rau kev txhim kho kev ua haujlwm ntawm cov kav hlau ductile, txuas ntxiv lawv lub neej kev pabcuam thiab ua tau raws li ntau yam kev xav tau ntawm daim ntawv thov. Los ntawm kev nkag siab tob txog cov duab metallographic theem thiab spheroidization tus nqi, peb tuaj yeem nkag siab zoo dua txog cov kav hlau ductile, ib qho khoom siv tseem ceeb hauv kev lag luam, thiab muab kev ua si tag nrho rau lawv cov txiaj ntsig hauv kev siv tiag tiag.
Lub sijhawm tshaj tawm: Lub Peb Hlis-21-2025
