Lub Main Mechanical Properties Of Nickel{0}}raws li Alloys

Thaum siv npib tsib xee- cov ntaub ntawv alloy, peb yuav tsum nkag siab lawv cov khoom siv tshuab ua ntej los txiav txim seb lawv puas ua tau raws li cov kev cai ntawm kev lag luam. Cov khoom siv tshuab no suav nrog: tensile zog (TS), lub zog tawm los (YS), elongation tus nqi, thiab hardness, thiab lwm yam.

 

Yuav kom tau txais cov ntaub ntawv no, yuav tsum muaj kev sim tensile. Kev ntsuas tensile yog siv los txiav txim siab tus cwj pwm ntawm cov khoom thaum raug axial tensile load. Cov cuab yeej siv rau kev ntsuas tensile yog hu ua universal tensile tshuab.

 

 

Tensile lub zog (TS): Qhov siab tshaj plaws kev ntxhov siab uas cov khoom tuaj yeem tiv taus ua ntej tawg, nws yog qhov tseem ceeb ntawm cov hlau hloov los ntawm cov yas deformation mus rau hauv cheeb tsam concentrated yas deformation, thiab nws kuj yog qhov siab tshaj plaws load - bearing peev xwm ntawm cov hlau nyob rau hauv static tensile tej yam kev mob. Lub cim yog Rm (lub teb chaws tus qauv qub GB / T 228-1987 qhia tias lub cim rau tensile zog yog σb), thiab chav tsev yog MPa.

 

Yield zog (YS): Tus nqi tseem ceeb ntawm kev ntxhov siab rau cov khoom kom tawm los. Lub zog tawm los yog qhov txwv tsis pub dhau ntawm cov khoom siv hlau thaum nws dhau qhov tshwm sim tawm los, uas yog, kev ntxhov siab tiv thaiv cov yas me me deformation. Rau cov hlau uas tsis muaj qhov tshwm sim pom tseeb tshwm sim, qhov kev ntxhov siab ua rau 0.2% seem deformation yog txhais raws li nws cov txiaj ntsig txwv, hu ua qhov txwv tsis pub dhau los lossis lub zog tawm los. Thaum lub zog ntau dua qhov kev txwv no ua rau nws, ib feem yuav raug deformation mus tas li; thaum tsawg dua qhov no, ib feem yuav rov qab mus rau nws qhov qub.

 

Elongation tus nqi: Qhov feem pua ​​​​ntawm tag nrho cov deformation ΔL ntawm cov qauv tom qab tensile tawg mus rau qhov qub gauge ntev L: δ=ΔL / L × 100%. Qhov siab lossis qis elongation tus nqi qhia tau hais tias lub peev xwm ntawm cov khoom siv los nqus lub zog thaum lub sijhawm siv cov txheej txheem quab yuam thiab cov yas deformation muaj peev xwm ntawm cov khoom. Qhov siab dua qhov elongation tus nqi, qhov ntau dua qhov deformation mus tas li uas cov khoom tuaj yeem tiv taus thaum lub sij hawm thov kev quab yuam, qhia cov yas deformation zoo dua, uas yog tsim rau engineering scenarios uas yuav tsum tau muaj zog toughness; thaum cov ntaub ntawv nrog ib tug qis elongation tus nqi qhia brittleness thiab muaj feem xyuam rau tam sim ntawd puas.

 

Kev kuaj Hardness: Hardness yog lub peev xwm ntawm cov khoom siv los tiv thaiv qhov chaw indentation ntawm nws qhov chaw. Cov kev sim hardness feem ntau suav nrog Brinell hardness (HB), Rockwell hardness (HR), thiab Vickers hardness (HC). Brinell hardness yog tsim rau cov ntaub ntawv yas, Rockwell hardness yog haum rau cov ntaub ntawv hlau, thiab Vickers hardness yog haum rau cov ntaub ntawv thinner los yog me me - cheeb tsam xeem. Ib qho kev sib piv ntxhib ntawm lawv tuaj yeem ua raws li kev paub dhau los thiab kev sim ntsuas.