Casting rau hauv qhov chaw khoov lossis ncaj nraim yuav ua rau muaj teeb meem ntawm ntug kev tawg thaum lub sij hawm deformation ntawm pickling.seamless yeeb nkab.
0Cr15mm9Cu2nin thiab 0Cr17Mm6ni4Cu2N stainless hlau belongs rau 200 series austenitic stainless hlau, uas txawv ntawm tsoos 200 series thiab 300 series austeniticstainless hlau. Hom no200stainless hlau square tubeNws yooj yim rau ntug tawg, nto kab nrib pleb, Qhov teeb meem tsis zoo molding zoo ntawm ntug kev puas tsuaj. Nyob rau hauv qhov tseeb kub dov ntau lawm, ob hom steel txais 200 series cua sov nkhaus, thiab lub cub tawg kub yog tswj ntawm 1215-1230C. Nws cov txheej txheem thermal siv lub khoos phis tawj theem ob "Rough Rolling Regulations" thiab "Finish Rolling Regulations". 800-1020C. Xa mus rau qhov tseeb kub dov txheej txheem ntawm ob picklingseamless yeeb nkab, tsim lub tshuab cua sov thiab deformation kub ntawm txoj kev sim no, thiab tom qab ntawd ua cov simulated kub dov xeem ntawm cov khoom siv kub dov ntsuas tsim thiab tsim los ntawm peb tus kheej. Niaj hnub no cov ntaub ntawv ntawm lub koom haum square yeeb nkab: siv AOD + LF refining txheej txheem los tsim 0Cr15Mm9Cu2Nn thiab 0Cr17I6ni4Cu2N pickling non-vascular nruam casting phem nruam casting los ntawm ntsug dabtsi yog khoov nruam casting txheej txheem, cross-sectional loj ntawm nruam casting phem yog 220m1260m. Qhov loj feem % yog qhia nyob rau hauv lub rooj. Lub microstructure ntawm lub plhaub phem ntawm qhov sib txawv ntawm qhov tob ntawm 0Cr15m9Cu2Nn acid-ntxuav tsis-vascular nruam casting, raws li qhia hauv daim duab, sib raug rau qhov tob ntawm lub plhaub tsis zoo. Thaum muaj xwm txheej txawv txav tshwm sim thiab qhov kub ntawm qhov ntug ntawm qhov casting tsis poob mus rau qhov qis-kub nkig ntau. Lub microstructure ntawm 15 thiab 25m. Cov duab ntawm microstructure thiab cov nplej loj ntawm 20g high-pressure boiler raj yuav nce nrog qhov tob ntawm lub plhaub slab. Hloov, tab sis qhia qhov txawv. Ntawm lub plhaub qhov tob d0m, lub microstructure feem ntau yog lub cev pob txha-hom dendrite qauv, thiab cov thawj thiab theem nrab dendrite sib nrug me me. Ntawm d5mm, nws feem ntau yog cov qauv dendrite.
Dendrite spacing yog loj. Ntawm d> 15mn, cov dendrites yog worm-zoo li, tab sis ntawm d25m, lawv yog cov cellular crystals. Lub microstructure ntawm Cr17Im6ni4Cu2N square tube nruam casting slab nyob rau hauv daim duab 1 qhia tau hais tias lub nruam casting phem plhaub yog ib tug dendrite qauv. Txawm hais tias muaj qee qhov sib txawv hauv dendrite morphology, nws cov qauv yog tsim los ntawm grey austenite matrix, thiab dub ferrite. Zoo li 0Cr15Mn9Cu2Nin square raj, raws li qhov tob ntawm lub plhaub nce, cov thawj thiab theem nrab dendrite spacing maj mam nce, thiab cov dendrite zoo hloov ntawm lub cev pob txha mus rau ib tug cab. , tus cwj pwm yas nyob rau hauv cov txheej txheem ntawm martensitic theem transformation nyob rau hauv hnav-resistant composite steel kav tau sim soj ntsuam, thiab cov austenite grain loj thiab nws austenite grain loj hlob txoj cai, martensite orientation, theem transformation plasticity, cuam tshuam ntawm kev ntxhov siab thiab morphology ntawm cov khoom siv kho tshuab. ntawm hnav-resistant composite steel kav. Nyob rau hauv cov xwm txheej ntawm qhov kub thiab txias 1010 austenitization 15mir, qhov pib kub taw tes s thiab qhov kawg kub taw tes ㎡ ntawm martensitic transformation nce nrog rau qhov nce ntawm austenitization kub, thiab cov tsis nyob rau hauv lub theem transformation yas qauv ntawm hnav-resistant composite steel yeeb nkab hloov nrog nce nrog. nce sib npaug kev ntxhov siab. Thaum qhov kub austenitization qis dua 1050C, qhov kev loj hlob ntawm cov nplej qhia tau hais tias kev loj hlob ib txwm muaj. Nrog rau lub sij hawm austenitization, lub round steel s nce. -3500 thermal simulator, tus cwj pwm yas ntawm hnav-tiv taus cov yeeb nkab steel yeeb nkab thaum lub sij hawm martensitic transformation txheej txheem tau sim soj ntsuam, thiab cov austenite grain loj thiab nws cov austenite grain txoj cai loj hlob, thiab cov martensite teebmeem ntawm orientation, theem transformation plasticity, Kev nyuaj siab thiab morphology ntawm cov khoom siv kho tshuab ntawm cov kav hlau tsis sib haum hnav-resistant. Nyob rau hauv cov xwm txheej ntawm 1010 austenitization rau 15 feeb, qhov pib kub taw tes s thiab qhov kawg kub taw tes ㎡ ntawm martensitic transformation nce nrog rau qhov nce ntawm austenitization kub, thiab parameter K nyob rau hauv lub theem transformation plasticity qauv ntawm hnav-resistant composite steel yeeb nkab nce nrog qhov sib npaug kev ntxhov siab. Thaum qhov kub austenitizing qis dua 1050C, qhov kev loj hlob ntawm cov nplej qhia tau hais tias kev loj hlob ib txwm muaj. Raws li lub sij hawm austenitizing nce, Yog nce, thiab B-theem transformation yog muab faib ua grain ciam teb. Lub nucleation thiab kev loj hlob ntawm theem thiab Muaj ob theem ntawm nucleation thiab kev loj hlob ntawm Widmanite a. theem. Thaum qhov txias txias yog nce los ntawm 0.1C / s mus rau 150C / s, theem kev hloov pauv ntawm B + a thiab + feem ntau tshwm sim hauv Ti-55 alloy. Cov nplej nyob rau hauv cov yeeb nkab hnav-tiv taus cov yeeb nkab tseem tuaj yeem nyob twj ywm thiab me me, thiab cov martensite Fine coherent complex carbides tau los nag rau saum npoo. Siv lub tshuab hluav taws xob xa hluav taws xob, ntsuas hluav taws xob lub tshuab ntsuas hluav taws xob, x-ray diffractometer thiab cov txheej txheem electrochemical los kawm txog microstructure thiab electrochemical cov khoom ntawm hnav-resistant steel yeeb nkab alloys nyob rau hauv ntau lub xeev xws li cam khwb cia, homogenized lub xeev, thiab lub xeev lub tsheb, thiab electron sojntsuam EPM. morphology thiab muaj pes tsawg leeg ntawm lub ntsiab precipitates nyob rau hauv hnav-resistant steel yeeb nkab annealed ntawm 150-300C tau soj ntsuam los ntawm lub zog spectrum tsom xam.
Post lub sij hawm: Mar-30-2023