Cov tshuaj tiv thaiv eutectoid tshwm sim ntawm qhov kub thiab txias. Qhov no yog hu ua eutectoid kub thiab yog 727degC.
Qhov kub npaum li cas eutectoid tshwm sim?
Cov tshuaj tiv thaiv eutectoid piav qhia txog theem kev hloov pauv ntawm ib qho khoom rau hauv ob qho sib txawv. Nyob rau hauv lub Fe-C system, muaj ib tug eutectoid taw tes ntawm kwv yees li 0.8wt% C, 723 ° C. theem siab tshaj qhov kub ntawm eutectoid rau cov pa carbon steels yog hu ua austenite lossis gamma..
eutectoid kub yog dab tsi?
Qhov kub ntawm eutectoid yog qhov ntsuas kub tsawg kawg nkaus uas cov khoom muaj nyob rau hauv ib qho kev daws teeb meemlossis, hauv lwm lo lus, thaum cov ntsiab lus alloying tag nrho soluble hauv matrix theem..
Qhov kub npaum li cas ua rau peritectic tshwm sim ?
Peritectic kub 1495 ° C (2723 ° F)Austenite (γ) theem (fcc) nrog carbon nyob rau hauv interstitial khoom tov. Vim tias qhov tshwm sim ntawm cov tshuaj tiv thaiv tsis tau pom nyob rau hauv qhov kawg microstructure ntawm carbon thiab tsis tshua muaj hlau alloy steels, me ntsis kev mloog yog them rau peritectic cov tshuaj tiv thaiv nyob rau hauv solidification theem.
eutectoid cov tshuaj tiv thaiv 727 C Mcq yog dab tsi?
(2) Qhov kub ntawm 1148 ° C yog lub npe hu ua eutectic cov tshuaj tiv thaiv uas cov kua hloov mus rau hauv kev sib xyaw ntawm austenite thiab cementite. Lub eutectic hu ua Ledeburite. (3) Qhov ntawm 727 ° C yog lub npe hu ua eutectoid transformation qhov twg austenite decomposes rau hauv kev sib xyaw ntawm ferrite thiab cementite. Qhov no hu ua Pearlite.
