Lub hli tas los, kuv tau mus ntsib ib tug kws ua haujlwm laus ntawm lub Hoobkas khoom siv refractory hauv Hebei. Nws taw tes rau ib qho qauv uas nyuam qhuav coj los ntawm lub qhov cub, thiab nws hais rau kuv tias, "Saib ntawm qhov seem no. Qhov ntxiv ntawm 'green silicon carbide micropowder' ua rau muaj qhov sib txawv tiag tiag; cov siv lead ua kom ntom dua, thiab xim yog qhov tseeb dua." "green silicon carbide micropowder" uas nws hais txog yog lub ntsiab lus ntawm peb qhov kev sib tham hnub no—hmoov silicon carbide ntsuabTxawm hais tias nws yog ib qho khoom xyaw uas paub zoo hauv kev lag luam abrasives, nws cov ntawv thov tshiab hauv cov khoom siv refractory hauv xyoo tas los no tau zoo kawg nkaus.
Tej zaum koj yuav tsis ntseeg nws, tab sis cov hmoov silicon carbide ntsuab thaum xub thawj tsuas yog "cov khoom xyaw txhawb nqa" hauv cov khoom siv refractory. Xyoo dhau los, qee cov chaw tsim khoom yuav ntxiv me ntsis kom txhim kho qhov kev tiv thaiv kev hnav ntawm qee cov khoom refractory. Txawm li cas los xij, hauv tsib lossis rau xyoo dhau los, qhov xwm txheej tau hloov pauv tag nrho. Raws li cov lag luam xws li hlau, cov hlau tsis yog ferrous, thiab ceramics tso cov kev thov siab dua rau cov cub tawg - xav tau kev tiv thaiv kub siab, kev tiv thaiv corrosion, thiab lub neej ntev - cov qauv khoom siv refractory ib txwm tau dhau los ua tsis txaus. Lub sijhawm no, cov kws ua khoom siv tau tig lawv lub siab rov qab mus rau "tus phooj ywg qub" no, tsuas yog pom tias, thaum siv kom raug, nws yog "cov khoom muaj nqis."
Yuav kom nkag siab tias vim li cas nws thiaj nrov ua luaj, peb yuav tsum saib nws lub zog tseem ceeb. Ua ntej, nws tiv taus cua sov.Ntsuab silicon carbideNws muaj zog tiv taus oxidation ntau dua li ntau cov khoom siv ib txwm muaj, txawm tias kub txog 1600 ℃ lossis siab dua, uas ua rau lub cub tawg kub siv tau ntev. Qhov thib ob, nws muaj qhov nyuaj thiab hnav tsis kam, ua rau nws zoo tagnrho rau thaj chaw uas raug cuam tshuam los ntawm kev puas tsuaj ntawm cov khoom siv, xws li cov qhov cub tawg thiab cov ntaub ntawm cov txaj dej uas ncig mus los. Qhov thib peb, thiab qhov tseem ceeb, nws muaj kev ua tau zoo heev. Qhov cwj pwm no, qee zaum suav tias yog qhov tsis zoo (vim nws tuaj yeem ua rau cua sov poob ntau ntxiv), tam sim no siv tau - nws tau dhau los ua qhov zoo hauv cov qauv uas xav tau kev hloov pauv cua sov sai thiab sib xws lossis kev tiv taus thermal shock.
Cov khoom no raug txhais ua li cas rau hauv kev siv tau? Cia kuv qhia ob peb yam piv txwv uas kuv tau pom los ntawm kuv tus kheej.
Ntawm ib lub Hoobkas hlau loj hauv Shandong, lub neej ntawm cov ntaub hauv lawv lub tsheb thauj hlau torpedo (cov ntaub loj siv los thauj hlau molten) tau qis tas li. Tom qab ntawd, pab pawg kws tshaj lij tau ntxiv cov hmoov silicon carbide ntsuab ntawm qhov loj me me rau hauv lub castable, thiab qhov txuj ci tseem ceeb tau tshwm sim. Cov ntaub tshiab tsis yog tsuas yog qhia txog kev tiv thaiv zoo rau kev puas tsuaj ntawm hlau molten thiab slag, tab sis kuj, vim tias cov hmoov me me tau puv cov qhov hauv lub matrix, ua rau muaj cov qauv ntom dua. Ib tug kws ua haujlwm hauv qhov chaw tau hais rau kuv tias, "Yav dhau los, cov ntaub ladle xav tau kev kho loj tom qab siv li ob puas; tam sim no nws yooj yim tshaj peb puas thiab tsib caug siv. Qhov no ib leeg txuag tau ntau ntawm cov nqi kho txhua xyoo thiab kev poob sijhawm."
Ib qho kev siv uas ntse dua yog nyob rau hauv cov khoom siv refractories uas muaj qib ua haujlwm. Hauv qee lub qhov cub uas siab heev, cov khoom sib txawv ntsib qhov chaw sib txawv heev. Qee qhov chaw xav tau kev tiv thaiv hluav taws kub heev, lwm qhov tiv thaiv kev poob siab thermal, thiab lwm qhov tsis nkag tau. Txoj hauv kev ntse tsis yog siv ib yam khoom rau txhua yam, tab sis siv cov qauv sib txawv hauv cov txheej sib txawv. Cov hmoov silicon carbide ntsuab ua lub luag haujlwm tseem ceeb ntawm no - ntau ntxiv tuaj yeem ntxiv rau txheej ua haujlwm uas kov ncaj qha rau cov hlau molten kub siab, siv nws qhov kev tiv thaiv kev yaig siab; hauv txheej nruab nrab, qhov sib piv tuaj yeem hloov kho kom zoo dua qhov sib phim thermal nthuav dav; thiab hauv txheej thaub qab, tsawg dua lossis tsis muaj hmoov yuav siv tau. Txoj hauv kev txheej txheem no txhim kho ob qho tib si kev ua tau zoo thiab kev lag luam. Ib lub tuam txhab hauv Zhejiang uas tsim cov rooj tog zaum ceramic tshwj xeeb tau ua rau lub neej ntawm nws cov rooj tog zaum kiln ntau dua 40% siv txoj hauv kev no.
Tej zaum koj yuav nug tias, vim li cas ho tsis ntxiv cov khoom me me xwb? Vim li cas ho hais kom siv "micropowder"? Qhov tseem ceeb yog nws lub peev xwm tsis yog tsuas yog ua lub zog txhawb nqa xwb tab sis kuj koom nrog hauv kev sib xyaw ua ke ntawm cov khoom. Thaum kub siab, cov khoom me me no muaj kev ua haujlwm siab ntawm qhov chaw, txhawb kev sib xyaw ua ke thiab pab tsim kom muaj kev sib txuas ua ke zoo dua. Tib lub sijhawm, nws ua haujlwm zoo li "xuab zeb" zoo tshaj plaws, ua kom tiav qhov sib txawv ntawm lwm cov khoom sib xyaw ua ke, txo qhov porosity. Nrog cov khoom siv denser, cov slag thiab cov pa roj alkaline tsis tshua nkag mus thiab ua rau puas tsuaj. Kuv tau pom cov ntaub ntawv sim qhia tias rau cov khoom siv refractory castables nrog tib cov mis, ntxiv cov hmoov silicon carbide ntsuab kom tsim nyog tuaj yeem ua rau lub zog flexural kub siab dua 20% -30%, thiab kev txhim kho hauv kev tsis nkag mus yog qhov tseem ceeb dua.
Tau kawg, cov khoom zoo tsis yog ib yam dab tsi uas koj muab pov rau hauv yam tsis muaj kev npaj. Qhov ntau npaum li cas, qhov kev faib tawm ntawm cov khoom me me, thiab yuav ua li cas sib xyaw nrog lwm cov khoom siv raw (xws li bauxite, corundum, thiab alumina micropowder) yog cov teeb meem nyuaj. Tsawg dhau yuav tsis muaj qhov cuam tshuam pom tseeb, thaum ntau dhau yuav cuam tshuam rau kev ua haujlwm lossis kim heev, qee zaum txawm tias ua rau muaj teeb meem lwm yam (xws li kev nkag siab rau qee qhov chaw txo qis). Qhov no yuav tsum tau cov kws tshaj lij ua cov kev sim rov ua dua kom nrhiav tau "qhov sib npaug zoo tshaj plaws." Ib tug kws ua haujlwm qub tau hais rau kuv ib qho piv txwv zoo heev: "Kev kho cov mis zoo li tus kws kho mob Suav tshuaj ib txwm sau ntawv rau daim ntawv yuav tshuaj; qhov ntau npaum li cas ntawm txhua yam khoom xyaw yuav tsum tau xav txog kom zoo."
Txog rau lub sijhawm no, tej zaum koj yuav tau paub tias lub luag haujlwm ntawm cov hmoov silicon carbide ntsuab hauv cov khoom siv refractory tab tom hloov pauv ntawm ib qho "additive" yooj yim mus rau "key modifier" uas tuaj yeem hloov pauv cov khoom siv microstructure thiab cov khoom. Nws tsis yog tsuas yog coj kev txhim kho hauv qee qhov ntsuas tab sis kuj nthuav dav cov peev xwm rau kev tsim khoom siv. Tam sim no, txawm tias qee lub koom haum tshawb fawb tab tom kawm txog yuav ua li cas los sib xyaw nws nrog nanotechnology thiab in-situ reaction technology los tsim cov tiam tom ntej ntawm cov khoom siv refractory ntse dua thiab ntev dua.
Txij li ib tug kws tshaj lij hauv kev lag luam abrasive mus rau ib lub hnub qub nce hauv kev lag luam refractory, zaj dab neeg ntawm cov hmoov silicon carbide ntsuab qhia peb tias kev nce qib ntawm thev naus laus zis feem ntau yog nyob rau hauv kev sib koom ua ke ntawm ntau yam kev kawm thiab kev tshawb pom tshiab hauv cov ntaub ntawv qub. Nws zoo li qhov tseem ceeb ntawm cov txuj lom hauv kev ua noj; siv kom raug thiab ntawm qhov kub thiab txias, nws tuaj yeem tsa tag nrho cov tais diav mus rau qib siab dua. Lub sijhawm tom ntej koj pom cov cub hluav taws xob niaj hnub no ua haujlwm tas li hauv cov nplaim taws, koj yuav xav tias hauv lawv cov ntaub ntawv ruaj khov, ntau lub pob zeb ntsuab me me ua lub luag haujlwm tseem ceeb. Qhov no tej zaum yog qhov zoo nkauj ntawm kev tshawb fawb txog cov ntaub ntawv - nws tuaj yeem tawg paj tshiab tshaj plaws hauv cov chaw ib txwm muaj.