Ukhiye wokuthuthukisaUkucaciswa okupholile kokukholelwakamuvaukuthethelelaukukhetha inani elifanele lokupholisa ukugwema iziphambeko ezipholile ezishiwo ngenhla. Ngokuvamile, ukucaciswa kokupholisa okupholile okuthethelisiwe kunqunywa ngokuya ngokwakheka kwamakhemikhali, izici ezedlule, isimo sezinto ezibonakalayo kanye nosayizi wesigaba sezinto ezimbi, ngokubhekisela kwimininingwane efanelekile.
Ngokuvamile, lula ukwakheka kwamakhemikhali okungenalutho, ngokushesha inani lokupholisa ngemuvaukuthethelela, kanye nokuhamba kancane ngenye indlela. Ngensimbi yekhabhoni nensimbi ephansi yensimbiukuthethelelwa, ukupholisa komoya kungamukelwa ngemuvaukuthethelela. Kanye nokwakheka okuyinkimbinkimbi kwensimbi ephezulu ye-alloyukuthethelelwanoma Ukukhokhiswa okuphakeme okuphezulu, ngemuva kokuphendula kufanele kuthathwe ukupholisa okupholile noma ukupholisa.
Uma ithuluzi le-carbon, ithuluzi lensimbi ye-alloy nensimbi enezinsimbi ezinokuqukethwe okuphezulu kwekhabhoni zipholile kancane ngemuvaukuthethelela, i-carbide yenethiwekhi izokwenqabela emngceleni wokusanhlamvu, okuzothinta kakhulu ukusebenza kwenkonzo kokwenziwa kokwenza. Ngakho-ke, lolu hlobo lwezinkomba luphonswe ku-700 ℃ ngokupholisa umoya, ukuqhuma noma ukufafaza ngokushesha ngemuva kokuphendula, beseukuthethelelwazibekwe emigodini noma isithando somlilo ukuze ziphole kancane.

Ngensimbi ye-auntenitic, insimbi ye-ferrite namanye amansimbi ngaphandle kwenguquko yesigaba, ukupholisa ngokushesha kungamukelwa ngoba akukho shintsho sesigaba kwinqubo yokupholisa ngemuvaukuthethelela. Ngaphezu kwalokho, ukupholisa okusheshayo kuyadingeka nokuthola isakhiwo sesigaba esisodwa futhi kuvikele ukunciphisa ukupholisa kwensimbi ye-Ferrite ngo-475 ℃. Ngakho-ke, lolu hlobo lwezinkomba lungaphola ngemuvaukuthethelela.
Ngensimbi epholile yomoya, efana ne-bainitic yensimbi, i-mainnsitic yensimbi engagqwali, insimbi yesivinini esikhulu, i-ally allooy ithumba, njll ngenxa yokupholisa umoya, kuzokwenza ukuguquguquka komoya, okuzoba lula ukucindezela okuphezulu . Ngakho-ke, lolu hlobo lwezinkomba kufanele luphonswe kancane ngemuvaukuthethelela.
Ngensimbi emhlophe ebucayi, efana nensimbi ye-chrome-nickel, ukuze ivikele indawo emhlophe kwinqubo yokupholisa, ukupholisa ukuthwala impahla yomsebenzi kufanele kwenziwe ngokuya ngezincazelo ezithile zokupholisa.
Ukuthethelelwaeyenziwe ngensimbi inesilinganiso sokupholisa esisheshayo ngemuvaukuthethelela, ngenkathi lezo ezenziwe ngensimbi ye-INGOT zibe nezinga lokupholisa kancane. Ngaphezu kwalokho, ukuthethelelwa ngosayizi omkhulu wesigaba kufanele kuphonswe kancane ngemuva kokucekela phansi ukucindezela okukhulu kokupholisa ukucindezela, ngenkathi lokhukuthethelwa ngosayizi omncane wesigaba kungaphola ngokushesha ngemuva kokuqamba.