Cov Khoom Sib Tsoo Hnav Txheej Txheem Yam Ntxim Saib Ntxim Uas

Hnav - Cov khoom nyob saum npoo ntawm qhov khoom yog maj mam poob vim yog txhua yam ua haujlwm. Coj tsis ua hauj lwm - khoom siv dag zog vim yog hnav thiab tu dua vim tsis muaj nuj nqi. Kev Sib Tsoo Pob Khoom Hnav Tso Nyiaj rau ntau tshaj 50% ntawm tag nrho cov hnav tag nrho. Cov npe hu ua abrasive hnav: qhov tawv los yog cov protrusions uas nkag mus rau qhov sib txoos sab ntawm sab nraud yog plowed ntau ntawm grooves rau ntawm qhov muag ntawm cov khoom muag, ua rau ib hom kev hnav ris tsho tshwm sim los ntawm cov khoom siv migration. Kev sib tsoo khoom tsom ntawm txoj hlua khau yuav tsum yog raws li kev coj thiab tsim kua muag ntawm sab nraud ntawm cheeb tsam thiab sib tsoo pob khoom muaj cov ntsiab lus ntawm ob qho tib si.

Mechanical hnav sab nraud: lub hardness, lub zog, ceev, lub kaum ntse ntse, kub, av noo, particle loj thiab lwm yam.

1, lub hardness ntawm abrasive: Cov ntau yam ntxwv ntawm hnav, cov khoom hardness ntawm qhov tseem ceeb.

2, kev siv; ntawm no yog hais txog lub siab ntawm cov khoom siv abrasive. Raws li kev hnav siab nce, hnav nce ntxiv. Raws li qhov tob tob ntawm kev sib tsoo khoom nce nrog kev nce siab, lub zog ntawm kev rhuav tshem ntawm cov khoom ntws nce.

4, taw tes ntawm kev pom: yaig los hnav lub pob zeb Sib tsoo pob khoom hnav yog loj heev. Tej qhov muaj feem cuam tshuam muaj qhov sib txawv ntawm cov khoom sib tsoo cov khoom 'brittle thiab ductile. Rau cov khoom siv txhuam hniav xws li ceramics, hnav ntau ntxiv nrog qhov nce ntxiv, ua kom ntau npaum li cas ntawm qhov feem ntswg ze ntawm 90 °, qhia tias cov khoom sib tsoo khoom tsis sib haum tsis haum rau kev siv hauv cov neeg mob siab zog; rau cov khoom siv zas, qhov hnav tau nce ua ntej nrog cov tswb siab loj, nce siab tshaj plaws ntawm ib qho chaw, ua raws li cov sib tsoo pob khoom rau lub kaum sab nraud nce nrog hnav thiab kua muag poob. Qhov no qhia tau hais tias cov khoom siv zis yog hnoos thiab ua kua muag thaum ua haujlwm tsis zoo, thaum muab tag nrho ua si rau nws txoj kev hnyav ntawm cov ces kaum siab. Qhov no yog vim qhov qis tshaj ntawm cov khoom siv zis, uas yog qhov feem ntau txaus siab rau qhov chaw yuav tsum tau hlais los ntawm cov khoom nplej uas tsis tshua muaj lub siab, thiab qhov hnyav nce, qhov ntawd yog qhov khoom siv nkig nyhav tshaj plaws yog qhov kev raug mob hnyav nto ntawm cov khoom thaum lub feem ntsug.