Cold drawn steel kavElongation thiab txo qhov chaw

Txias kos yog cov txheej txheem cov khoom siv, rau cov khoom siv hlau, xa mus rau cov duab kos kom ua tiav cov duab thiab qee yam khoom siv, cov khoom siv nyob rau hauv chav tsev kub rau kev kos duab.Cov khoom txias kos piv rau thermoforming: siab qhov tseeb qhov tseeb thiab qhov zoo ntawm qhov chaw tiav.

Kos loj txoj kab uas hla steel yeeb nkab Elongation (σ), nyob rau hauv qhov kev ntsuam xyuas tensile, Qhov ntev ntawm cov qauv tom qab snap nws qhov ntau tau nce raws li feem pua ​​​​ntawm qhov ntsuas qhov ntev hu ua elongation.Nrogσ qhia nyob rau hauv units ntawm %.Cov mis yog: qhov twg : L1 - cov qauv fractured gauge ntev, mm;L0 - tus qauv ntsuas qhov ntev, mm.

Kos duab loj kab yeeb nkab seem shrinkage (ψ) nyob rau hauv qhov kev ntsuam xyuas tensile, qhov piv txwv loj tshaj qhov feem pua ​​​​ntawm cov nqi ntawm qhov chaw seem ntawm qhov qub ntawm nws qhov chaw hla ntawm lub caj dab rub tawm, hu ua seem shrinkage.Rauψ qhia nyob rau hauv units ntawm %.Muab xam raws li hauv qab no: qhov twg: S0 - qhov qub piv txwv hla ntu ntu, mm2;S1 - cov pob txha pob txha caj dab tsawg kawg yog qhov chaw hla ntu, mm2.

Cov qauv tensile kuaj rau hauv caj dab ntawm cov txheej txheem yas deformation.Tom qab ntawd qhov elongation ntawm tus qauv qhia tau hais tias muaj qhov sib txawv ntawm qhov sib txawv raws li lub caj dab ntawm cov qauv txuas ntxiv mus, kom txog rau thaum tag nrho cov qauv ua lub caj dab.Ib qho kev poob qis hauv lub caj dab tau tshwm sim nyob rau hauv kev tawm dag zog theem.Thaum lub teeb duab kub ntawm cov hlau ntawm cov ntsiab lus hauv daim duab hauv qab qhov ntsuas kub ntawm recrystallization ntawm daim duab, nyob rau hauv daim duab saum toj no lub recrystallization kub yog kub kos duab ntawm qhov kub siab tshaj qhov kub ntawm chav tsev kub hauv qab lub recrystallization kub ntawm daim duab rub.Kev kos duab hlau hlau, hlau ntau lawm kos duab feem ntau txoj kev.Thermal rub lub xaim kom sov ua ntej nkag mus rau hauv qhov chaw tuag, cov hlau refractory feem ntau yog siv rau kev kos duab, xws li tungsten, molybdenum thiab lwm yam hlau hlau.Thaum qhov kub thiab txias rub cov hlau yuav tsum tsuas yog rub mus rau hauv lub qhov tuag los ntawm lub rhaub mus rau qhov ntsuas kub, feem ntau yog rau zinc hlau, cov hlau tsis yooj yim rau deformation xws li kev kub ceev steel, bearing steel duab.