1. Insimbi ecinyiwe neqinisiwe
Ukuhlolwa kobulukhuni bensimbi ecishiwe neqinisiwe kusebenzisa kakhulu isikali se-HRC se-Rockwell hardness tester. Uma izinto zincane futhi isikali se-HRC singafaneleki, isikali se-HRA singasetshenziswa esikhundleni salokho. Uma izinto zincane, izikali zobulukhuni be-Rockwell surface HR15N, HR30N, noma HR45N zingasetshenziswa.
2. Insimbi eqinile ebusweni
Ekukhiqizweni kwezimboni, ngezinye izikhathi ingqikithi yomsebenzi iyadingeka ukuze ibe nokuqina okuhle, kuyilapho ubuso budingeka futhi bube nokuqina okuphezulu kanye nokumelana nokuguguleka. Kulesi simo, ukucisha imvamisa ephezulu, i-chemical carburization, i-nitriding, i-carbonitriding kanye nezinye izinqubo zisetshenziselwa ukwenza ukwelashwa kokuqina kobuso ku-workpiece. Ubukhulu besendlalelo sokuqina kobuso ngokuvamile buphakathi kwamamilimitha ambalwa namamilimitha ambalwa. Ngezinto ezinezendlalelo zokuqina kobuso obukhulu, izikali ze-HRC zingasetshenziswa ukuhlola ubulukhuni bazo. Ngezinsimbi zokuqina kobuso obukhulu obuphakathi, izikali ze-HRD noma ze-HRA zingasetshenziswa. Ngezendlalelo zokuqina kobuso obuncane, izikali zokuqina kobuso be-Rockwell i-HR15N, i-HR30N, kanye ne-HR45N kufanele zisetshenziswe. Ngezendlalelo zokuqina kobuso obuncane, kufanele kusetshenziswe umhloli wokuqina we-micro Vickers noma umhloli wokuqina we-ultrasonic.
3. Insimbi ehlanganisiwe, insimbi ejwayelekile, insimbi emnene
Izinto eziningi zensimbi zikhiqizwa esimweni esifakwe insimbi noma esijwayelekile, kanti amanye amapuleti ensimbi aqoqwe ngokubandayo nawo ahlelwa ngokwezinga elihlukene lokunamathisela. Ukuhlolwa kobulukhuni kwezinsimbi ezahlukahlukene ezifakwe insimbi ngokuvamile kusebenzisa izikali ze-HRB, futhi ngezinye izikhathi izikali ze-HRF nazo zisetshenziselwa amapuleti athambile futhi acwebezelayo. Kumapuleti amancane, kufanele kusetshenziswe izikali zobunzima ze-Rockwell ze-HR15T, HR30T, kanye ne-HR45T.
4. Insimbi engagqwali
Izinto zensimbi engagqwali zivame ukuhlinzekwa ezimweni ezifana nokufaka insimbi, ukucima, ukufudumala, kanye nesisombululo esiqinile. Izindinganiso zikazwelonke zichaza amanani obulukhuni aphezulu naphansi ahambisanayo, kanti ukuhlolwa kobulukhuni kuvame ukusebenzisa isivivinyo sobulukhuni seRockwell i-HRC noma izikali ze-HRB. Isikali se-HRB kufanele sisetshenziselwe insimbi engagqwali ye-austenitic ne-ferritic, isikali se-HRC sesivivinyo sobulukhuni seRockwell kufanele sisetshenziselwe insimbi engagqwali ye-martensite kanye ne-precipitation, kanye nesikali se-HRN noma isikali se-HRT sesivivinyo sobulukhuni seRockwell kufanele sisetshenziselwe amashubhu ensimbi engagqwali anezindonga ezincane kanye nezinto zeshidi ezinobukhulu obungaphansi kuka-1 ~ 2mm.
5. Insimbi eyenziwe ngobumba
Ukuhlolwa kobulukhuni beBrinell kuvame ukusetshenziselwa insimbi ehlanganisiwe, ngoba isakhiwo esincane sensimbi ehlanganisiwe asilingani ngokwanele, futhi ukugoba kokuhlolwa kobulukhuni beBrinell kukhulu. Ngakho-ke, ukuhlolwa kobulukhuni beBrinell kungabonisa imiphumela ephelele yesakhiwo esincane kanye nezakhiwo zazo zonke izingxenye zezinto.
6. Insimbi ephothiwe
Izinto zensimbi ehlanganisiwe zivame ukubonakala ngesakhiwo esingalingani kanye nokusanhlamvu okuqinile, ngakho-ke ukuhlolwa kobulukhuni be-Brinell kuvame ukwamukelwa. Isihloli sobulukhuni se-Rockwell singasetshenziswa ekuhlolweni kobulukhuni kwezinye izinto zokusebenza zensimbi ehlanganisiwe. Lapho kungekho ndawo eyanele engxenyeni encane yokusanhlamvu okuhle kokuhlolwa kobulukhuni be-Brinell, isikali se-HRB noma se-HRC singasetshenziswa ukuhlola ubulukhuni, kodwa kungcono ukusebenzisa isikali se-HRE noma se-HRK, ngoba izikali ze-HRE ne-HRK zisebenzisa amabhola ensimbi anobubanzi obungu-3.175mm, angathola ukufundwa okungcono okumaphakathi kunamabhola ensimbi anobubanzi obungu-1.588mm.
Izinto zensimbi eziqinile ezithambile ngokuvamile zisebenzisa i-Rockwell hardness tester HRC. Uma izinto zingalingani, idatha eningi ingalinganiswa bese kuthathwa inani elimaphakathi.
7. I-carbide eqoshiwe (ingxubevange eqinile)
Ukuhlolwa kobulukhuni bezinto eziqinile ze-alloy kuvame ukusebenzisa isikali se-HRA sokuhlola ubulukhuni se-Rockwell kuphela.
8. Impuphu
Isikhathi sokuthunyelwe: Juni-02-2023
