Hlau yog ib yam khoom tseem ceeb hauv peb lub neej. Koj paub ntau npaum li cas txog hlau? Dab tsi yog qhov yield point, dab tsi yog yield lub zog, Yog tias koj paub tag nrho cov kev paub? Hauv qab ntawm qhov kev paub txog los ua ib qho kev taw qhia.
1) Taw tes ntawm cov hlau (s)
Cov hlau lossis cov specimen nyob rau hauv lub tensile, thaum kev ntxhov siab tshaj qhov tsis pub tshaj, txawm hais tias qhov kev nyuab siab tsis nce, thaum cov hlau los yog cov qauv tseem muaj teeb meem loj deformation, hu ua no phenomenon yield, thiab paib phenomenon ntawm qhov tsawg tshaj plaws kev nyuaj siab nqi li qhov kev tawm los.
Cia Ps yog tus quab yuam sab nraud ntawm qhov kev tawm los ntawm qhov taw qhia s, Fo yog thaj tsam ntawm qhov feem ntawm qhov hnoos qis, tom qab ntawd qhov kev tawm los s / Ps / Fo (MPa), MPa yog sib npaug N (Newton) / mm2, (MPa = 106Pa, Pa: Pascal = N / m2).
2) Cov pa tawm ntawm lub zog (0.2)
Qee yam ntawm cov khoom siv hlau lo tau pom tseeb heev, muaj teeb meem hauv kev ntsuas, txhawm rau ntsuas cov paib ntawm cov khoom siv, cov cai ntawm cov khoom pov thawj ntawm cov khoom pov thawj cov vaj huam sib luag yog sib npaug rau ib qho nqi (feem ntau 0.2% ntawm thawj qhov ntev ) kev nyuab siab, paub tias cov xwm txheej Ua kom muaj zog los yog lub sij hawm luv luv zog 0.2.
3) Tensile zog ntawm hlau (b)
Cov khoom nyob rau hauv txoj kev ncab, pib ntawm pob txha ntawm qhov siab tshaj plaws thaum uas nws qhia tias qhov kev muaj peev xwm ntawm cov hlau kom muaj zog ntawm qhov muaj zog ntawm lub zog thiab lub zog tensile sib thooj rau lub zog ntawm kev khoov siab thiab ua rau.
Cia Pb yog qhov siab tshaj plaws quab yuam ua ntej cov khoom raug rub tawm, Fo yog thaj tsam ntawm qhov kev kuaj ntawm cov quav, ces lub zog tensile b = Pb / Fo (MPa).
4) Hlau Kev Nyuaj Siab (s)
Cov khoom nyob hauv kev tshem tawm, cov yas elongation ntawm qhov ntev ntawm qhov ntev ntawm tus qauv thawj hu ua feem pua ntawm elongation lossis elongation.
5) Cov qauv paj laum (s / b)
Cov paib kis tau los ntawm cov pa roj carbon dioxide ratio ntawm 0.6-0.65, qes-hlau qau hlau 0.65-0.75 hlau alloy hlau yog 0.84-0.86.
6) Hlau hnyav
Hardness uas cov khoom ntawm cov khoom hauv lub zog ntawm lub zog khoom nws muaj peev xwm ntawm nws yog ib qho tseem ceeb qhia ntawm cov ntaub ntawv hlau, kev nyuaj ntawm kev nyuaj siab zog ntawm cov yeeb yam ntawm hardness Brinell hardness thiab Vickers hardness.
