Eyona nto isetyenziswa kakhulu kwimveliso bubulukhuni bendlela yokucinezela, njengokuqina kweBrinell, ukuqina kweRockwell, ukuqina kweVickers kunye nobunzima obuncinci.Ixabiso elifunyenweyo lobunzima ngokubalulekileyo limele ukuchasana kwendawo yesinyithi kwi-deformation yeplastiki ebangelwa kukungena kwezinto zangaphandle.
Oku kulandelayo yintshayelelo emfutshane kwiiyunithi ezahlukeneyo zobunzima:
1. Ukuqina kweBrinell (HB)
Cinezela ibhola yentsimbi eqinile yobungakanani obuthile (ngokuqhelekileyo i-10mm ububanzi) kwindawo yezinto eziphathekayo kunye nomthwalo othile (ngokuqhelekileyo i-3000kg) kwaye uyigcine ixesha elithile.Emva kokuba umthwalo ususiwe, umlinganiselo womthwalo kwindawo yokufakela i-Brinell hardness value (HB), kwi-kilogram force / mm2 (N / mm2).
2. Ukuqina kweRockwell (HR)
Xa i-HB>450 okanye isampulu incinci kakhulu, uvavanyo lobulukhuni be-Brinell alunakusetyenziswa kwaye endaweni yokulinganisa ubulukhuni be-Rockwell kufuneka kusetyenziswe.Isebenzisa i-cone ye-diamond ene-vertex angle ye-120 ° okanye ibhola yensimbi kunye nobubanzi be-1.59mm kunye ne-3.18mm ukucinezela ebusweni bezinto eziza kuvavanywa phantsi komthwalo othile, kwaye ubunzima bezinto eziphathekayo bufumaneka. ubunzulu bokujongwa.Ngokobulukhuni bemathiriyeli yovavanyo, inokubonakaliswa ngezikali ezintathu ezahlukeneyo:
I-HRA: Bubulukhuni obufunyenwe ngokusebenzisa umthwalo we-60kg kunye ne-diamond cone indenter, kwaye isetyenziselwa izinto ezinobunzima obuphezulu kakhulu (ezifana ne-cemented carbide, njl.).
I-HRB: Bubulukhuni obufunyenwe ngokusebenzisa umthwalo we-100kg kunye nebhola yentsimbi eqinile kunye nobubanzi be-1.58mm.Isetyenziselwa izinto ezinobulukhuni obuphantsi (njengensimbi ene-annealed, iron cast, njl.).
I-HRC: Bubulukhuni obufunyenwe ngokusebenzisa umthwalo we-150kg kunye ne-diamond cone indenter, kwaye isetyenziselwa izinto ezinobunzima obuphezulu (ezifana nentsimbi eqinile, njl.).
3 Vickers ubunzima (HV)
Sebenzisa i-indenter ye-diamond square cone kunye nomthwalo ongaphantsi kwe-120kg kunye ne-engile ye-vertex ye-136 ° ukuze ucinezele kumphezulu wezinto eziphathekayo, kwaye uhlukanise ummandla womhlaba we-indentation ye-indenter ngexabiso lomthwalo, okuyixabiso le-Vickers ubunzima be-HV ( kgf/mm2).
Xa kuthelekiswa novavanyo lobulukhuni bukaBrinell kunye neRockwell, uvavanyo lobulukhuni beVickers luneenzuzo ezininzi.Ayinayo imiqobo yeemeko ezichaziweyo zomthwalo P kunye ne-indenter diameter D njengeBrinell, kunye nengxaki yokuguqulwa kwe-indenter;kwaye ayinayo ingxaki yokuba ixabiso lobulukhuni beRockwell alinakudityaniswa.Kwaye inokuvavanya naziphi na izinto ezithambileyo nezilukhuni njengeRockwell, kwaye inokuvavanya ubulukhuni beendawo ezibhityileyo ngokugqithisileyo (okanye iileya ezibhityileyo) ngcono kuneRockwell, enokwenziwa kuphela ngokuqina komphezulu weRockwell.Kodwa naphantsi kweemeko ezinjalo, inokuthelekiswa kuphela ngaphakathi kwesikali seRockwell, kwaye ayinakudityaniswa namanye amanqanaba obunzima.Ukongeza, ngenxa yokuba i-Rockwell isebenzisa ubunzulu be-indentation njengesalathisi somlinganiselo, kwaye ubunzulu be-indentation buhlala buncinci kunobubanzi be-indentation, ngoko ke impazamo yayo ehambelana nayo inkulu.Ngoko ke, idatha yobunzima be-Rockwell ayizinzile njengoBrinell kunye noVickers, kwaye ngokuqinisekileyo ayizinzile njengeVickers ngokuchanekileyo.
Kukho unxulumano oluthile loguqulo phakathi kukaBrinell, uRockwell kunye noVickers, kwaye kukho itheyibhile yokuguqula ubudlelwane obunokubuzwa.
Ixesha lokuposa: Mar-16-2023
