Izigaba ezintathu zokucisha insimbi eyindilinga kanye nemishini yokukhiqiza eshisayo.

1. Isigaba sokucisha sesithando sokushisa sokungeniswa

Isigaba sokucisha se isithando sokushisa sangaphakathi ihlelwa ngemuva kohlaka lwesithando sokushisa lokungeniswa futhi luqukethe uhlelo lokupholisa amanzi ajikelezayo. Lapho impahla ye-bar ishiselwa ekushiseni okucishayo, iphuma esithandweni sokushisa sokungeniswa, futhi ukusetshenziswa okunengqondo nokuphumelelayo kwemishini yokupholisa amanzi ejikelezayo kungenza ukuthi impahla yebha ipholiswe ngobudlova lapha. Phezulu kwebha, inani lokupholisa lidlula inani elibalulekile le-martensite, ngakho-ke isakhiwo se-martensite singakhiwa phezulu ukuze kuzuzwe injongo yokucisha.

2. Isigaba sokushisa sesithando sokushisa sokungeniswa

Isitokwe sebha esicinyiwe sithuthwa ngesistimu yokudlulisela esithandweni sokushisa sokungeniswa ukuze sishise. Ngemva kokufinyelela izinga lokushisa elipholile, ibha ithuthwa ngaphandle kwesithando sokushisa sokungeniswa ngetafula eligoqayo. Ibha ivezwa emoyeni, futhi ukushisa okuphakathi kuzothinteka. Dlulisela kungqimba olungaphezulu bese uthulisa ubuso ukuze ufeze inhloso yokuthambisa.

3. Isigaba sokupholisa sesithando sokushisa sokungeniswa

Lesi sigaba senzeka kamuva, ikakhulukazi i-austenite enkabeni ibhekana nokuguqulwa kwe-isothermal ukuze ithole isimo sokugcina sesakhiwo se-metallographic.

I-round steel quenching kanye nokushisa kuyindlela ephumelelayo yokuthuthukisa ikhwalithi, engathuthukisa isakhiwo sangaphakathi sesiqephu esigoqiwe, ukuze uthole amandla angcono wemishini. Ukwelashwa kokushisa okuku-inthanethi komkhiqizo ogoqiwe kungenza uhlaka lwe-martensite lwengqimba engaphezulu ngokucisha, futhi ngokudluliswa kokushisa okuyisisekelo, i-martensite ye-surface layer i-self-tempered, ukuze ungqimba olungaphezulu lungathola isakhiwo se-martensite esithambile. Umnyombo unokwehla okukhulu kwezinga lokushisa ngenxa yokupholisa kwesendlalelo esingaphezulu, esilungisa isakhiwo se-pearlite esikhiqizwe, esingagcini nje ukwandisa ubulukhuni besendlalelo esingaphezulu, kodwa futhi sithuthukisa isakhiwo esiyinhloko. Ukwengeza, ukucisha insimbi eyindilinga eku-inthanethi kanye nokushisa kungathuthukisa izici zemishini yepuleti lensimbi futhi kunciphise okuqukethwe kwekhabhoni kanye nezakhi ze-alloying. Ukwelashwa kokushisa okuku-inthanethi kuhlanganisa ukushisisa okulawulwayo, ukugingqika okulawulwayo kanye nokupholisa okulawulwayo kube inqubo ephelele yokukhiqiza yokonga amandla, ngakho-ke kungonga amandla amaningi futhi kunciphise izindleko.