Mechanical zog ntawm cov ntaub ntawv hlau

Cov yam ntxwv ntawm cov hlau xa mus rau cov yam ntxwv ntawm cov hlau nyob rau hauv lub zog sab nraud, feem ntau suav nrog cov ntsuas hauv qab no.

① Qhov kawg lub zogσb: qhov siab tshaj plaws kev ntxhov siab ntawm qhov tensile stress-strain nkhaus, unit

Yog MPa.

② Yield Limitσs: thaum lub tensile kev nyuaj siab ntawm cov khoom ntau tshaj qhov elastic ntau thiab yas deformation pib tshwm sim Stress.Tsis muaj qhov pom tseeb yield plateau nyob rau hauv lub tensile stress-strain nkhaus ntawm ib co ntaub ntawv, uas yog, nws yield tsis tau kom meej meej txiav txim cov ntsiab lus.Nyob rau hauv cov ntaub ntawv no, nws tau teev nyob rau hauv engineering hais tias qhov kev nyuaj siab tus nqi ntawm 0.2% residual deformation ntawm tus qauv yog coj raws li lub conditional yield txwv.σ0.2 yog qhia hauv MPa.

③ Endurance Limit: creep puas ntawm tus qauv tom qab ib lub sijhawm ntawm qhov kub thiab txias

Nruab nrab kev ntxhov siab ntawm tawg.Hauv engineering, nws feem ntau yog qhia los ntawm qhov nruab nrab qhov kev ntxhov siab ntawm tus qauv thaum nws tawg rau 10⁵h ntawm qhov ntsuas kub tsim Qhov me ntsis yog MPa.

④ Creep Limit: ua kom cov qauv tsim ib qho nyiaj ntawm qhov kev ntxhov siab ntawm creep.Tus nqi kev ntxhov siab ntawm cov hlau ntawm qhov tsim kub rau 10⁵h thiab creep tus nqi ntawm 1% feem ntau yog siv hauv engineering Is in MPa.

⑤ Qhov feem pua ​​Elongationδ8: qhia tias thaum tus qauv puas lawm nyob rau hauv tensile xeem Feem pua ​​ntawm cov yas elongation.Nws yog ib qho kev ntsuas los ntsuas cov plasticity ntawm cov hlau.Thawj qhov ntev ntawm tus qauv yog feem ntau xaiv raws li qhov ntev ntawm tus qauv

5 zaug lossis 10 npaug ntawm txoj kab uas hla, yog li cov qauv muaj δ₅thiab δ₁₀, hauv%.

⑥ Txo thaj tsamψ: qhia tau hais tias thaum tus qauv puas nyob rau hauv lub tensile xeem

Raw yas deformation tus nqi.Nws yog lwm qhov ntsuas los ntsuas cov plasticity ntawm cov ntaub ntawv, qhia hauv%.

⑦ Tus nqi cuam tshuam A_k: Nws yog ib qho kev ntsuas ntawm steel toughness thiab txiav txim seb cov hlau puas nkig tsis ua hauj lwm Qhov taw qhia, chav tsev: J.

⑧ Hardness: qhia txog qhov tsis kam ntawm cov khoom rau hauv zos yas deformation thiab hnav tsis kam ntawm cov khoom.Muaj peb hom hardness tables Qhia txog txoj hauv kev, piv txwv li Brinell hardness HB, Rockwell hardness HR thiab Vickers Vickers Pob Zeb Diamond Hardness HV muaj ntau txoj kev ntsuas thiab kev siv ntau yam.Raws li kev paub Muaj kev sib raug zoo ntawm hardness thiab tensile lub zog raws li hauv qab no: dov thiab normalized qis carbon steelσ_b= 0.36 HB;Dov thiab normalized nruab nrab carbon hlau los yog tsawg alloy hlauσ_b= 0.35 HB;Lub hardness yog 250 ~ 400HB, thiab kub-kho alloy hlauσ_b= 0.33 HB.

Vim qhov yooj yim ntawm kev ntsuas, qhov hardness ntawm thaj tsam kub-tshwj xeeb kuj yog siv los txiav txim siab txog qib hardening ntawm cov pob qij txha.

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