Cov ntsiab lus yooj yim ntawm cementite
Cementite yog cov hlau sib txuas ua los ntawm cov hlau thiab cov pa roj carbon thiab muaj tshuaj lom neeg cov tshuaj ntawm Fe3C. Cov pa roj carbon ntsiab lus ntawm cov cementite yog ωc = 6.67% thiab cov ntsiab lus yaj yog 1227 ° C. Nws cov lattice siv lead ua yog cov orthorhombic lattice uas muaj lub siab tawv ntawm HBW = 800, plasticity thiab toughness yog yuav luag xoom, thiab lub brittleness yog loj heev.
Muaj cov qauv sib txawv ntawm cov cementite nyob rau hauv cov hlau-carbon alloys, thiab lawv cov ntau, morphology thiab faib tau cuam tshuam ncaj qha rau cov khoom ntawm cov hlau-carbon alloys. [1] Muab faib rau hauv thawj cementite (precipitated los ntawm theem ua kua), theem nrab cementite (precipitated los ntawm austenite) thiab tertiary cementite (precipitated los ntawm ferrite).