Feem ntau hais lus, zoo zoocov ntaub ntawv refractorymuaj cov txiaj ntsig zoo thiab kev pab lub neej ntev thaum siv rau hauv qhov cub thiab qhov cub, tab sis cov kev siv tsis tuaj yeem tsis quav ntsej. Piv txwv li, yog tias tib cov khoom siv refractories siv rau tib cov khoom siv thermal, cov txiaj ntsig ntawm kev siv feem ntau sib txawv vim muaj kev hloov pauv ntawm kev siv. Muaj ntau yam laj thawj rau qhov tsis ua hauj lwm ntawm lub qhov cub hauv ob sab phlu, xws li lub qhov cub nkag thiab hauv ob sab phlu spalling. Cov hauv qab no feem ntau qhia txog kev tsom xam ntawm qhov ua rau lub qhov cub nkag thiab hauv ob sab phlu spalling hauv induction furnaces.
Qhov tshwm sim ntawm qhov cub nkag mus rau qhov tshwm sim yog tshwm sim: ntau cov hlau nkag mus rau hauv cov kab nrib pleb ntawm cov khoom siv refractory. Kev nkag mus rau hauv cub tawg yuav ua rau: kev nkag mus rau hlau nyob ib ncig ntawm lub qhov cub nkag; lub neej ntawm cov khoom siv refractories ntawm lub qhov cub hauv ob sab phlu yog txo qis; thaum ntxov grounding tswb; muaj peev xwm ntawm cov hlau ua kua drilling rau hauv lub kauj; zuag qhia tag nrho sintering ntawm qhuav vibration ntaub ntawv tsis muaj xoob txheej; qhov cub hauv ob sab phlu yog txuas ntxiv nthuav tawm ntawm lub qhov cub qhov ncauj; oxidation ntawm qhov cub nkag mus yuav ua rau lub zos refractory yaig, thiab lwm yam. Daim duab 1 Yog vim li cas rau cov hlau nkag nyob ib ncig ntawm lub cub tawg yog feem ntau cov kab nrib pleb tsim los ntawm kub thiab txias cycles, nrog rau kab rov tav kab nrib pleb, ntsug kab nrib pleb thiab tawg nyob rau hauv txhua txoj kev.
Cov laj thawj tseem ceeb ntawm kev tsim cov kab nrib pleb kab rov tav yog: ① Delamination: txoj kev siv hluav taws xob tsis raug, ua rau lub tshuab hluav taws xob hauv ob sab phlu tsis tsim cov txheej txheej tuab tuab; ② Lub tshuab hluav taws xob hauv ob sab phlu: feem ntau tshwm sim ntawm qhov sib txuas ntawm lub qhov hluav taws xob ua haujlwm thiab cov khoom siv hluav taws xob ua haujlwm, uas tuaj yeem daws tau los ntawm kev hloov txoj kev tsim kho ntawm lub tshuab hluav taws xob. Vertical tawg yog tshwm sim los ntawm kub thiab txias shocks, feem ntau yog tshwm sim los ntawm kev ua kom txias tsis raug thiab cov txheej txheem rov ua dua. Kev tawg ntawm txhua qhov kev taw qhia feem ntau yog tshwm sim los ntawm kev sib tsoo tshuab lossis demolding. Rauv hauv ob sab phlu rwj rauv hauv ob sab phlu tev yog ib qho tshwm sim nyob rau hauv uas cov ntaub ntawv refractory poob tawm ntawm lub sintering rauv phab ntsa nyob rau hauv blocks los yog nplooj ntawv.
Yog vim li cas rau daim tawv nqaij peeling yog:
(1) Kev tsim kho lub tshuab hluav taws xob tsis raug lossis sintering ua rau lub tshuab hluav taws xob hauv ob sab phlu tsis ua kom zoo sintering txheej, ua rau hauv ob sab phlu. (2) Dej vapor: Cov hauv ob sab phlu yog sintered ceev heev, thiab cov dej noo nyob rau hauv cov khoom refractories tsis tuaj yeem tawm hauv lub sijhawm. Thaum kub kub, H2O decomposes rau hauv H2 thiab O2. Raws li kev sib npaug ntawm cov roj zoo: PV=nRT, nws tuaj yeem pom tias qhov kub ntawm cov pa nce nrawm, cov khoom ntawm lub siab thiab qhov ntim ntawm cov pa yuav nthuav dav, thiab qhov ntim yuav nthuav dav sai. Cov pa nrog nrawm nrawm nrawm yuav ua rau lub tshuab hluav taws xob tsis muaj hluav taws xob tev tawm.
(3) Mechanical peeling: Qhov cuam tshuam rov qab los ntawm kev them nyiaj ntawm lub tshuab hluav taws xob hauv ob sab phlu, tshwj xeeb tshaj yog nyob rau hauv qab ntawm lub cub tawg, yog qhov tseem ceeb ntawm cov tshuab tev tawm.
(4) Expansion peeling: Tom qab cov hlau molten erodes lub cub tawg hauv ob sab phlu, lub thermal expansion tus nqi ntawm qhov eroded yog inconsistent nrog lub thermal expansion tus nqi ntawm uneroded ib feem, uas ua rau nws yooj yim los tsim kom muaj kev ntxhov siab nyob rau hauv lub interface ntawm ob thiab ua rau lub qhov cub hauv ob sab phlu poob.
(5) Extrusion peeling: Nws feem ntau tshwm sim ntawm lub cub tawg hauv qab, tshwm sim los ntawm kev cuam tshuam ntawm kev them nyiaj ntawm lub cub tawg hauv qab thiab lub sij hawm ntev ntawm cov hlau molten nws tus kheej qhov hnyav ntawm lub cub tawg hauv qab.
(6) Thermal peeling: Qhov kub hloov pauv sai, thiab qhov hloov pauv sai heev thiab loj heev nyob rau lub sijhawm luv luv, ua rau muaj kev ntxhov siab loj hauv cov khoom siv refractory, ua rau tawg, tev thiab puas.
