1. Insimbi ecishiwe futhi ethambile
Ukuhlolwa kokuqina kwensimbi ecishiwe neqinile kusetshenziswa isikali se-Rockwell sokuqina sokuqina kwe-HRC. Uma okokusebenza kukuncane futhi isikali se-HRC singafanelekile, esikhundleni salokho kungasetshenziswa isikali se-HRA. Uma impahla izacile, kungasetshenziswa isikali sokuqina se-Rockwell esingaphezulu i-HR15N, HR30N, noma i-HR45N.
2. Insimbi eqinile ebusweni
Ekukhiqizeni izimboni, ngezinye izikhathi umnyombo womsebenzi uyadingeka ukuze ube nokuqina okuhle, kanti indawo engaphezulu nayo iyadingeka ukuze ibe nobulukhuni obuphezulu nokumelana nokugqoka. Kulokhu, ukucisha i-high-frequency quenching, i-chemical carburization, i-nitriding, i-carbonitriding nezinye izinqubo zisetshenziselwa ukwenza ukwelashwa kokuqina kwendawo yokusebenza. Ugqinsi longqimba oluqinisayo ebusweni ngokuvamile luphakathi kwamamilimitha ambalwa namamilimitha ambalwa. Okwezinto zokwakha ezinezendlalelo eziqina kakhulu, izikali ze-HRC zingasetshenziswa ukuhlola ubulukhuni bazo. Ezinsimbi eziqinisa indawo eziwugqinsi omaphakathi, izikali ze-HRD noma ze-HRA zingasetshenziswa. Okwezendlalelo eziqinisa ubuso obuncane, izikali zokuqina ze-Rockwell ezingaphezulu i-HR15N, HR30N, ne-HR45N kufanele zisetshenziswe. Okwezendlalelo eziqinile ezingaphansi, kufanele kusetshenziswe i-micro Vickers tester noma i-ultrasonic hardness tester.
3. Insimbi ene-anealed, insimbi evamile, insimbi emnene
Izinto eziningi zensimbi zikhiqizwa esimweni esine-annealed noma esijwayelekile, kanti ezinye izingcwecwe zensimbi ezigoqiwe ezibandayo nazo ziyahlelwa ngokuya ngamazinga ahlukene okudonsa. Ukuhlolwa kokuqina kwezinsimbi ezihlukahlukene ezifakwe emanzini ngokuvamile kusebenzisa izikali ze-HRB, futhi ngezinye izikhathi izikali ze-HRF nazo zisetshenziselwa amapuleti athambile futhi azacile. Kumapuleti amancane, izikali zokuqina kwe-Rockwell HR15T, HR30T, ne-HR45T kufanele zisetshenziswe.
4. Insimbi engagqwali
Izinto zensimbi engagqwali zivame ukunikezwa ezifundazweni ezifana ne-annealing, quenching, tempering, kanye nesixazululo esiqinile. Amazinga kazwelonke acacisa amanani ahambisanayo obulukhuni aphezulu naphansi, futhi ukuhlola ubulukhuni ngokuvamile kusebenzisa i-Rockwell hardness tester HRC noma izikali ze-HRB. Isikali se-HRB sizosetshenziselwa i-austenitic nensimbi engagqwali ye-ferritic, isikali se-HRC sokuhlola ubulukhuni be-Rockwell sizosetshenziselwa i-martensite kanye nemvula eqinisa insimbi engagqwali, futhi isikali se-HRN noma isikali se-HRT sokuhlola ubulukhuni be-Rockwell sizosetshenziselwa amashubhu ensimbi engenasici anezindonga ezincane nezinto zeshidi ezinogqinsi olungaphansi kuka-1~2mm.
5. Insimbi eyakhiwe
Ukuhlolwa kokuqina kokuqina kwe-Brinell kuvame ukusetshenziselwa insimbi efojiwe, ngenxa yokuthi i-microstructure yensimbi efojiwe ayifani ngokwanele, futhi ukuhlehlisa kokuhlolwa kokuqina kwe-Brinell kukhulu. Ngakho-ke, ukuhlolwa kokuqina kwe-Brinell kungabonisa imiphumela ebanzi ye-microstructure kanye nezakhiwo zazo zonke izingxenye zezinto.
6. Insimbi
Izinto zensimbi ezisansimbi zivame ukubonakala ngesakhiwo esingalingani kanye nezinhlamvu ezimahhadla, ngakho ukuhlolwa kokuqina kokuqina kweBrinell kuvame ukwamukelwa. Umhloli wokuqina we-Rockwell ungasetshenziselwa ukuhlola ubulukhuni kwezinye izinsimbi zokusebenza ezisansimbi. Lapho ingekho indawo eyanele engxenyeni encane yokusakazwa okusanhlamvu okuhle kokuhlolwa kokuqina kokuqina kwe-Brinell, isikali se-HRB noma i-HRC ngokuvamile singasetshenziswa ukuhlola ubulukhuni, kodwa kungcono ukusebenzisa isikali se-HRE noma se-HRK, ngoba izikali ze-HRE ne-HRK zisebenzisa amabhola ensimbi angu-3.175mm ububanzi, angathola ukufundwa okungcono okumaphakathi kuno-1.58.8mm wensimbi amabhola angu-1.58.8mm.
Izinto ezisansimbi ezithambile ezithambileyo ngokuvamile zisebenzisa i-Rockwell hardness tester HRC. Uma okokusebenza kungalingani, idatha eminingi ingakalwa futhi kuthathwe inani elimaphakathi.
7. I-Sintered carbide (i-hard alloy)
Ukuhlola ubulukhuni bezinto eziqinile zengxubevange ngokuvamile kusebenzisa isikali se-HRA sokuhlola ubulukhuni be-Rockwell kuphela.
8. Impushana
Isikhathi sokuthumela: Jun-02-2023
