Video: Martensite pib kub yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Martensite transformation pib ntawm martensite pib kub , TMs, (Fig. 1), uas tuaj yeem sib txawv ntawm qhov dav ntawm qhov kub thiab txias, txij li siab txog 500 ° C mus rau qhov zoo hauv qab chav kub , nyob ntawm qhov concentration ntawm γ-stabilizing alloying ntsiab nyob rau hauv cov hlau.
Ib yam li ntawd, koj tuaj yeem nug, ntawm qhov kub li cas ntawm martensite?
Martensite tsim yog txawv txawv. Nws ua tsis tshwm sim maj mam thaum peb quench. Nws tshwm sim tag nrho ntawm ib tug tam sim ntawd ntawm kub tsawg li ob peb 100 centigrade thaum ib atoms tsis tuaj yeem txav tau ntau ntxiv lawm. Tab sis dislocations tseem tuaj yeem, thiab martensite tsim yog ib tug txheej txheem uas muaj ntau yam dislocations.
Tsis tas li ntawd, MS thiab MF kub yog dab tsi? Cov kub ntawm qhov kev hloov pauv ntawm austenite rau martensite yuav ua tiav (tiav). Mf tsuas txhais tau tias martensite tiav . Nyob rau hauv tsawg carbon, tsawg alloy steels Mf kub yog hais txog 250ºC. Saib thiab ' Ms kub '.
Tom qab ntawd, martensite yog dab tsi thiab nws tsim li cas?
Martensite yog tsim nyob rau hauv cov pa roj carbon steel los ntawm qhov txias txias (quenching) ntawm austenite daim ntawv ntawm cov hlau ntawm tus nqi siab uas cov pa roj carbon atoms tsis muaj sijhawm los nthuav tawm ntawm cov qauv siv lead ua hauv qhov loj txaus rau daim ntawv cementite (Fe3C).
Dab tsi yog qhov txawv ntawm martensite thiab tempered martensite?
Qhov yooj yim qhov sib txawv ntawm lub microstructure ntawm kub siab thiab untempered martensite yog Untempered martensite muaj koob duab whereas raws li peb khaws cia tempering nws, microstructure hloov mus rau hom bushy thiab carbides pib precipitating rau nws.
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