Rockwell hardness test siv peb qhov kev sim thiab peb qhov indenters, ua rau cuaj qhov sib xyaw ua ke rau cuaj Rockwell hardness scales: HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, thiab HRK. Cov cuaj nplai no npog yuav luag txhua cov khoom siv hlau uas siv ntau tshaj plaws. HRA: 60kg load pob zeb diamond cone indenter; HRB: 100kg load 1/16 "inch steel pob indenter; HRC: ... A 150kg load pob zeb diamond cone indenter; feem ntau siv cov nplais yog HRC, HRB, thiab HRF. HRC nplai yog siv los kuaj quenched steel, tempered steel, quenched thiab tempered steel, thiab qee qhov kev lag luam steel hlau feem ntau siv. HRB scale yog siv los ntsuam xyuas ntau yam annealed steels, normalized steels, me me steels, ib co stainless steels, thiab nyuaj tooj liab alloys. HRF nplai yog siv los ntsuas cov tooj liab ntshiab, softer tooj liab alloys, thiab tawv aluminium alloys. Txawm hais tias HRA nplai kuj tseem tuaj yeem siv rau cov hlau ferrous feem ntau, nws daim ntawv thov siv tau feem ntau txwv rau kev sim cov alloys nyuaj thiab nyias nyias nyias.
Qhov saum npoo Rockwell hardness test siv peb qhov kev xeem quab yuam thiab ob lub indenters, uas ua rau muaj rau kev sib xyaw ua ke, sib xws rau rau qhov ntsuas ntawm Rockwell hardness. Qhov chaw Rockwell hardness test yog ib qho ntxiv rau Rockwell hardness test. Thaum siv Rockwell hardness test, thaum… Thaum ntsib cov ntaub ntawv nyias, cov qauv me me, cov txheej txheem hnyav hnyav, lossis cov txheej txheej coated, yuav tsum siv qhov kev ntsuam xyuas ntawm Rockwell hardness. Nyob rau hauv rooj plaub no, siv tib lub indenter li Rockwell hardness test tab sis tsuas yog ib feem ntawm qhov kev xeem quab yuam, cov txiaj ntsig zoo hardness tuaj yeem tau txais ntawm cov qauv. N- nplai ntawm Rockwell hardness yog tsim rau cov ntaub ntawv zoo ib yam li cov kev sim nrog Rockwell hardness (HRC, HRA, thiab HRD); T- nplai yog tsim rau cov ntaub ntawv zoo ib yam li cov kev sim nrog Rockwell hardness (HRB, HRF, thiab HRG).
Kev xyaum tau pom tias muaj kev sib raug zoo ntawm tus nqi hardness thiab lub zog ntawm cov khoom siv hlau. Qhov no yog vim hais tias tus nqi hardness yog txiav txim los ntawm kev tsis kam mus rau thawj cov yas deformation thiab tsis kam mus txuas ntxiv cov yas deformation; qhov siab dua lub zog ntawm cov khoom, qhov siab dua qhov kev tiv thaiv ntawm cov yas deformation, thiab yog li tus nqi hardness ntau dua. Txawm li cas los xij, kev sib raug zoo ntawm kev hloov dua siab tshiab tsis zoo ib yam ntawm cov khoom sib txawv.
