Rockwell hardness tester yog ib yam khoom uas txiav txim siab hardness ntawm cov khoom los ntawm kev ntsuas qhov tob ntawm nws indentation. Thaum lub sij hawm sim, lub indenter ntawm hardness tester yog nias rau hauv qhov chaw ntawm cov khoom nyob rau hauv ib tug tej yam load, tsim ib tug indentation. Qhov tob ntawm qhov indentation yog inversely proportional rau hardness ntawm cov khoom; uas yog, qhov tob indentation, softer cov khoom, thiab vice versa. Txhawm rau kom ntseeg tau tias kev txav mus los ntawm lub indenter thiab txo kev sib txhuam thiab hnav thaum lub sij hawm indentation thiab tshem tawm, lub hardness tester yuav tsum tau lubricating roj rau lubrication thiab tiv thaiv.
Lubricating Roj Xaiv Cov Cai
Tsim nyog viscosity: Lub viscosity ntawm cov roj lubricating yog ib qho tseem ceeb cuam tshuam rau nws cov nyhuv lubrication. Cov viscosity ntau dhau tuaj yeem ua rau cov dej ntws tsis zoo, ua rau nws nyuaj rau kev tsim cov yeeb yaj kiab uas tsis sib xws ntawm cov khoom siv thiab cov khoom siv; viscosity tsis txaus yuav tsis muab kev tiv thaiv lubrication txaus, uas ua rau kom nrawm nrawm ntawm lub indenter. Yog li ntawd, xaiv cov roj lubricating uas tsim nyog viscosity yog qhov tseem ceeb rau kev ua haujlwm ntawm Rockwell hardness tester.
Zoo Oxidation Resistance: Thaum lub sij hawm siv lub hardness tester, cov roj lubricating tuaj rau hauv kev sib cuag nrog oxygen nyob rau hauv cov huab cua, uas tuaj yeem ua rau oxidation yooj yim, ua rau cov roj deterioration thiab kev ua haujlwm tsis zoo. Yog li ntawd, xaiv cov roj nplua nyeem uas muaj cov oxidation zoo tuaj yeem txuas ntxiv nws lub neej kev pab cuam, txo qhov hloov zaus, thiab txo nqi txij nkawm.
Muaj zog tiv thaiv-cov khoom hnav: Lub indenter raug kev sib txhuam loj thiab siab thaum cov khoom ntxig thiab tshem tawm, yooj yim ua rau hnav. Yog li ntawd, cov roj nplua nyeem yuav tsum muaj cov khoom zoo los tiv thaiv- hnav kom txo tau qhov hnav tsis zoo, txhim kho kev ntsuas qhov tseeb, thiab txuas ntxiv lub neej ntawm cov khoom siv.
Hom ntawm lubricants:
Mineral oil-raws li lubricants: Mineral oil-raws li lubricants yog refined los ntawm roj av thiab muaj lubrication zoo thiab oxidation kuj. Lawv yog cov pheej yig thiab yog ib qho ntawm cov khoom siv feem ntau siv rau Rockwell hardness testers.
Synthetic oil-raws li lubricants: Synthetic oil-raws li lubricants yog tsim los ntawm chemical synthesis thiab muaj oxidation kuj zoo heev, tiv thaiv- coj lub zog, thiab siab - kub stability. Lawv tsim nyog rau daim ntawv thov uas xav tau kev ua haujlwm siab lubrication. Txawm hais tias tus nqi qis dua, tus nqi tag nrho yuav qis dua nyob rau lub sijhawm ntev.