Kev ntsuas kev ua tau zoo ntawm cov tshuab feem ntau yog muab faib ua ob pawg, ib qho yog kev sim ncab, thiab lwm qhov yog kev sim hardness.
1. Kev ntsuas kev ncab yog tswj cov kauv hlau rau hauv cov qauv. Rub tus qauv mus rau qhov tawg ntawm lub tshuab ntsuas stretch, thiab tom qab ntawd txiav txim siab ib lossis ob peb yam khoom siv. Feem ntau, tsuas yog lub zog tensile, lub zog tawm los, thiab tus nqi elongation ntawm qhov txuas ntxiv tom qab kev txiav tawm raug ntsuas. Thiab seem contraction tus nqi. Qhov kev sim ncab yog cov khoom siv hlau, uas yog ib qho kev sim ntsuas kev ua tau zoo dua qub. Yuav luag tag nrho cov ntaub ntawv hlau tau teev cov kev ntsuam xyuas ncab ntev npaum li lawv muaj cov cai rau cov khoom siv kho tshuab. Tshwj xeeb tshaj yog cov ntaub ntawv uas tsis yooj yim rau kev sim hardness, stretch tests tau dhau los ua ib qho kev ntsuas kev ua tau zoo xwb.
2. Qhov kev ntsuam xyuas hardness yog maj mam nias lub taub hau nyuaj rau hauv qhov chaw ntawm cov qauv raws li cov txheej txheem, thiab tom qab ntawd sim ntsuas qhov tob tob lossis qhov loj los txiav txim qhov loj ntawm cov khoom hardness. Kev xeem Hardness yog ib qho yooj yim, sai dua, thiab siv tau yooj yim dua hauv cov khoom siv kev ntsuas kev ua tau zoo. Lub hardness test tsis yog-destructive, thiab muaj ib tug zoo xws li hloov dua siab tshiab kev sib raug zoo ntawm hardness tus nqi ntawm cov khoom thiab lub tensile lub zog. Lub hardness ntawm cov khoom tuaj yeem hloov mus rau hauv tus nqi tensile lub zog, uas yog qhov tseem ceeb tshaj plaws. Tam sim no, txoj kev no tau siv ntau dua.
Kev sib piv ntawm ob. Qhov kev sim ncab tsis yooj yim rau kev sim, thiab nws yooj yim heev los hloov los ntawm hardness mus rau qhov siv. Yog li ntawd, tib neeg muaj ntau dua thiab tsawg dua qhov nyuaj ntawm cov ntaub ntawv thiab tsawg dua sim lawv lub zog. Tshwj xeeb tshaj yog vim qhov kev vam meej tas mus li thiab kev tsim kho tshiab ntawm hardness meter manufacturing technology, qee cov ntaub ntawv uas tsis tuaj yeem kuaj qhov tawv nqaij ncaj qha, xws li kauv steel kav, stainless hlau daim hlau, thiab stainless hlau siv, tam sim no tau ncaj qha mus kuaj hardness. Yog li ntawd, ib qho kev sim hardness maj mam hloov cov qauv ntawm stretching xeem.
