Video: Puas yog pearlite yog BCC?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ferrite yog ib qho khoom siv hauv cov hlau thiab muaj BodyCentred Cubic ( BCC ) qauv [uas yog tsawg densely packedthan FCC]. Fe3C yog hu ua cementite thiab kawg (rau peb), "eutectic zoo li" sib tov ntawm alpha + cementite yog hu ua pearlite.
Ib yam li ntawd, cov qauv siv lead ua ntawm pearlite yog dab tsi?
Pearlite yog ob-theem, lamellar (los yog txheej) qauv muaj li ntawm alternating txheej ntawm ferrite (87.5wt%) thiab cementite (12.5 wt%) uas tshwm sim nyob rau hauv ib co steels thiab castirons.
Ledeburite thiab pearlite yog dab tsi? Hauv cov hlau thiab hlau metallurgy, ledeburite yog ib qho kev sib xyaw ntawm 4.3% carbon hauv hlau thiab yog ib qho sib xyaw eutectic ntawm austenite thiab cementite. Nws yog feem ntau pom nrog cementite los yog pearlite nyob rau hauv ib tug ntau yam ntawm cam khwb cia hlau. Nws muaj npe tom qab themetallurgist Karl Heinrich Adolf Ledebur (1837–1906).
Ua li no, BCC puas yog hlau?
BCC yog lub cev centered cubic thiab FCC yog facecentered cubic. Hlau -carbon eutectic theem daim duab, qhia ntau yam ntawm FexCy tshuaj. Cov alpha hlau (α) yog lub cev-centered cubic ( BCC ) thiab thegamma hlau (γ) yog lub ntsej muag-centered cubic (FCC).
Puas yog martensite FCC lossis BCC?
Hlau hloov los ntawm lub ntsej muag-centered cubic ( FCC ) qauv - hu ua gamma theem, los yog austenite - ntawm hightemperature mus rau lub cev-centered cubic ( BCC ) qauv -alpha theem, lossis ferrite - ntawm qhov kub thiab txias.
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