Martensite tsis pom nyob rau hauv daim duab qhia theem sib npaug ntawm cov hlau-carbon vim nws tsis yog theem sib npaugCov theem sib npaug tsim los ntawm cov cua txias qeeb uas tso cai rau lub sijhawm txaus rau kev nthuav dav., whereas martensite feem ntau yog tsim los ntawm cov cua txias heev.
Vim li cas martensite tsis sib npaug?
Tsis zoo li isothermal decomposition ntawm theem cov khoom siv uas ua kom muaj kev sib npaug ntawm cov txheej txheem sib txawv, martensite tsis tshwm sim ntawm cov duab sib npaug… Thaum cov hlau maj mam txias los ntawm theem austenite, cov qauv siv lead ua (qhov loj me) hloov mus rau qhov tsawg dua ntim ferrite theem.
Lub sijhawm twg tsis tshwm sim hauv daim duab hlau-hlau carbide?
beta theem tsis yog theem cais rau Fe… nws yog qhov tsis yog-magnetic alpha theem uas tseem hu ua beta theem…
Puas yog martensite yog BCC?
Nws cov qauv tau piav qhia tias loj heev, cubic, lath-zoo li, lenticular, subgrain-muaj bundles ntawm qis C cov ntsiab lus (piv txwv li mus txog 0.6mass% C). … Piv txwv li, nws tau pom tias martensite muaj BCC qauv hauv cov pa roj carbon tsawg txog 0.6mass% C.
Cov kev txwv ntawm kev siv cov hlau-hlau carbide daim duab yog dab tsi?
10.9 Ob qhov kev txwv ntawm cov hlau-hlau carbide theem daim duab yog: 1) Cov theem nonequilibrium martensite tsis tshwm rau ntawm daim duab; thiab 2) Daim duab qhia tsis qhia txog lub sijhawm-kub kev sib raug zoo rau kev tsim pearlite, bainite, thiab spheroidite, tag nrho cov uas yog tsim los ntawm qhov sib npaug …
