Xa sivavanya ubulukhuni beebha ezijikelezileyo zentsimbi yekhabhoni ezinobulukhuni obuphantsi, kufuneka sikhethe umvavanyi wobulukhuni ngokufanelekileyo ukuqinisekisa ukuba iziphumo zovavanyo zichanekile kwaye ziyasebenza. Singacinga ngokusebenzisa isikali se-HRB somvavanyi wobulukhuni weRockwell.
Isikali se-HRB somvavanyi wobulukhuni weRockwell sisebenzisa i-indenter yebhola yentsimbi enobubanzi obuyi-1.588mm kunye namandla ovavanyo ahambelanayo ayi-100KG. Uluhlu lokulinganisa lwesikali se-HRB lubekwe kwi-20-100HRB, efanelekileyo kuvavanyo lobulukhuni bezinto ezininzi zebha yentsimbi yekhabhoni enobunzima obuphantsi.
1. Ukuba ibha ejikelezileyo yentsimbi yekhabhoni icinyiwe kwaye inobunzima obuphezulu obumalunga ne-HRC40 – HRC65, kuya kufuneka ukhethe isivavanyeli sobunzima beRockwell. Isivavanyeli sobunzima beRockwell kulula kwaye kuyakhawuleza ukuyisebenzisa, kwaye sinokufunda ngokuthe ngqo ixabiso lobunzima, elifanelekileyo lokulinganisa izixhobo zobunzima obuphezulu.
2. Kwiibhari ezijikelezileyo zentsimbi yekhabhoni eziphathwe nge-carburizing, nitriding, njl.njl., ubunzima bomphezulu buphezulu kwaye ubunzima obuphakathi buphantsi. Xa kufuneka ulinganise ngokuchanekileyo ubunzima bomphezulu, umvavanyi wobunzima beVickers okanye umvavanyi wobunzima obuncinci unokukhethwa. Ukufakwa kovavanyo lobunzima beVickers sisikwere, kwaye ixabiso lobunzima libalwa ngokulinganisa ubude obujikelezayo. Ukuchaneka kokulinganisa kuphezulu kwaye kunokubonakalisa ngokuchanekileyo utshintsho lobunzima kumphezulu wezinto.
3. Ukongeza kwisikali se-HRB sesivavanyeli sobunzima baseRockwell, isivavanyeli sobunzima baseBrinell singasetyenziselwa ukuvavanya izixhobo zebha yentsimbi yekhabhoni enobunzima obuphantsi. Xa kuvavanywa imivalo yentsimbi yekhabhoni, isivavanyeli sayo siya kushiya indawo enkulu yokugoba phezu komphezulu wezinto, enokubonakalisa ngokupheleleyo nangokupheleleyo ubunzima obuqhelekileyo bezinto. Ngexesha lokusebenza kwesivavanyeli sobunzima, isivavanyeli sobunzima baseBrinell asikhawulezi kwaye silula njengesivavanyeli sobunzima baseRockwell. Isivavanyeli sobunzima baseBrinell sisikali se-HBW, kwaye ii-indenter ezahlukeneyo zihambelana namandla ovavanyo. Kwiibha zentsimbi yekhabhoni ezinobunzima obuphantsi ngokubanzi, njengalezo zikwimeko eyomileyo, ubunzima buhlala bumalunga ne-HB100 - HB200, kwaye isivavanyeli sobunzima baseBrinell sinokukhethwa.
4. Kwimivalo ejikelezileyo yentsimbi yekhabhoni enobubanzi obukhulu kunye nemilo eqhelekileyo, abavavanyi bobunzima obahlukeneyo bayasebenza ngokubanzi. Nangona kunjalo, ukuba ububanzi bebha ejikelezileyo buncinci, njengongaphantsi kwe-10mm, umvavanyi wobunzima beBrinell unokuchaphazela ukuchaneka kokulinganisa ngenxa yokugoba okukhulu. Ngeli xesha, umvavanyi wobunzima beRockwell okanye umvavanyi wobunzima beVickers unokukhethwa. Ubungakanani babo bokugoba buncinci kwaye bunokulinganisa ngokuchanekileyo ubunzima beesampulu ezincinci.
5. Kwimivalo engqukuva yentsimbi yekhabhoni engacwangciswanga ngendlela engaqhelekanga ekunzima ukuyibeka kwibhentshi yokusebenzela yomvavanyi wobulukhuni wesiqhelo ukuze ilinganiswe, umvavanyi wobulukhuni ophathwayo, njengomvavanyi wobulukhuni weLeeb, unokukhethwa. Isebenzisa isixhobo sobulukhuni ukuthumela umzimba wobundlongondlongo kumphezulu wento elinganiswayo, kwaye ibala ixabiso lobundlongondlongo ngokusekelwe kwisantya umzimba wobundlongondlongo obuya ngaso. Kulula ukuyisebenzisa kwaye inokwenza imilinganiselo kwindawo yokusebenza kwiimilo nobukhulu obahlukeneyo.
Ixesha leposi: Epreli-14-2025
