2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Tag nrho annealing yog cov txheej txheem maj mam nce kub txog 50 ºC (122 ºF) saum tojAustenitic kub kab A3 lossis kab ACM hauv rooj plaub ntawm Hypoeutectoid steels (steels nrog 0.77%…
Qhov kub npaum li cas Hypoeutectoid steels tau rhuab thaum lub sij hawm tag nrho annealing?
Kev piav qhia: Hypoeutectoid steels muaj cov ntsiab lus carbon uas tsawg dua 0.77%. Rau tag nrho annealing ntawm cov hlau no, nws yog rhuab 30-60 o C saum kab A3. Nws tau tuav ntawm qhov ntsuas kub no rau lub sijhawm, thiab tom qab ntawd maj mam txias mus rau chav sov.
Kev kho cua sov tag nrho yog dab tsi?
Tag nrho annealing yog txheej txheem los ntawm cov txheej txheem uas cov txheej txheem txias txias ua haujlwm tau hloov rov qab mus rau ib qho uas tsis muaj kab mob los ntawm kev siv cov cua sov. Qhov no yog txheej txheem solid-state thiab feem ntau yog ua raws li qeeb-txias hauv qhov cub. Rov qab yog thawj theem ntawm kev tshem tawm.
Yuav ua li cas yog qhov tshwm sim ntawm tag nrho annealing ntawm hypoeutectoid steel?
Annealing yog nqa tawm los kho cov nplej, ua kom softness, txhim kho hluav taws xob / sib nqus thiab txhim kho machinability. Ib coarse-grained 0.20 feem pua carbon steel (hypoeutectoid steel) tuaj yeem ua kom zoo dua los ntawm kev ua kom tag nrho raws li tau piav qhia hauv qab no. … Txhawm rau kho cov nplej loj ferrite cov khoom yuav tsum tau ua kom sov ntxiv.
Dab tsi yog qhov ntsuas kub siab tshaj plaws rauHypereutectoid hlau?
Cov hlau no tsim los ua cov tshuaj tov ntawm txhua qhov kub ntawm qhov austenitic thiab tag nrho cov pa roj carbon yog yaj hauv austenite. Ntawm qhov tseem ceeb (eutectoid) kub ntawm cov hlau-cementite system (1 340 ° F, 727 ° C), muaj kev hloov pauv ntawm austenite mus rau lamellar pearlite.
Pom zoo:
Nyob rau hauv benzene tag nrho cov carbon yog?
Peb paub tias benzene muaj cov qauv hexagonal nyob rau hauv uas tag nrho cov pa roj carbon atoms yog sp 2 hybridized, thiab tag nrho cov carbon- carbon bonds yog sib npaug ntawm qhov ntev. Raws li qhia hauv qab no, cov seem cyclic array ntawm rau p-orbitals (ib qho ntawm txhua cov pa roj carbon) sib tshooj kom tsim tau rau 6 molecular orbitals, peb daim ntawv cog lus thiab peb cov tshuaj tiv thaiv.
Nyob rau hauv lub tshuab ntawm tag nrho cov transaminases pyridoxal phosphate?
Ib txoj kev hloov pauv dav dav. Cov coenzyme, pyridoxal phosphate (PLP),txuas rau apoenzyme(enzyme tsis muaj coenzyme lossis cofactor) los ntawm pawg ε-amino (ε=epsilon) ntawm lysine residue hauv qhov chaw nquag, raws li qhia nyob rau hauv lub thib ob sab laug qauv;
Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej?
Detering yog tus neeg ua liaj ua teb los ntawm Txhua Tus Neeg Tsis Txaus Siabntawm Sab Hnub Poob los ntawm Erich Maria Remarque. Nws muaj siab mos siab muag, tshwj xeeb tshaj yog thaum nws los txog rau nees. Nws muaj kev kub ntxhov loj heev thaum nws hnov cov nees quaj thiab txawm sim tua lawv kom kawg lawv txoj kev txom nyem.
Puas yog tag nrho cov neeg zoo tag nrho narcissists?
Narcissist yeej muaj peev xwm nqa tau cov yam ntxwv ntawm kev ua tau zoo heev, xav tswj txhua yam, xav kom lawv lub ntiaj teb nyob rau hauv kev txiav txim zoo, tab sis tsis yog txhua tus narcissist, qee qhov kev tsis sib haum xeeb tib yam uas ib tug neeg tuaj yeem ua tau zoo heev thiab txawm tias tej zaum ntau dhau lawm, xav tau yam nyob hauv … Puas yog perfectionism ib daim ntawv ntawm narcissism?
Txoj kev ntawm tag nrho nyob rau hauv 2021 nyob qhov twg?
Hnub ci dab noj hnub tag nrho ntawm Lub Kaum Ob Hlis 4, 2021 tsuas yog tuaj xyuas thaj av ntawm Antarctica thaum lub caij ntuj sov austral. Rau lub hlis dhau los, hnub ci dab noj hnub ntawm lub Rau Hli 10, 2021 pib nyob rau sab qab teb Canada, hla Greenland, thiab hla North Ncej, ua ntej xaus rau sab hnub tuaj Siberia.
