Ukwelashwa kokucisha nokushisa kubhekisela endleleni yokwelapha ukushisa okumbaxambili yokucisha kanye nezinga lokushisa eliphezulu, okuhloswe ngalo ukuqinisekisa ukuthi ucezu lokusebenza lunezakhiwo ezinhle eziphelele zemishini. Ukushisa okuphezulu kokushisa kubhekisela ekushiseni okuphakathi kuka-500-650 ℃. Izingxenye eziningi ezicishiwe neziqinile zisebenza ngaphansi kwemithwalo emikhulu eguquguqukayo, futhi zithwala imiphumela yokushuba, ukucindezelwa, ukugoba, i-torsion noma ukugunda. Ezinye izindawo zibuye zibe nokungqubuzana, okudinga ukumelana nokugqoka okuthile, nokunye. Ngamafuphi, izingxenye zisebenza ngaphansi kwengcindezi eyinhlanganisela ehlukahlukene. Lezi zinhlobo zezingxenye ngokuyinhloko ziyizingxenye zesakhiwo semishini ehlukahlukene kanye nezinqubo, njengemigodi, izinduku zokuxhuma, izigxobo, amagiya, njll., futhi zisetshenziswa kakhulu ezimbonini zokukhiqiza ezifana namathuluzi emishini, izimoto, nogandaganda. Ikakhulukazi izingxenye ezinkulu ekwenziweni komshini osindayo, ukwelashwa kokucisha kanye nokushisa kusetshenziswa kakhulu. Ngakho-ke, ukwelashwa kokucisha nokushisa kudlala indima ebaluleke kakhulu ekwelapheni ukushisa. Emikhiqizweni eyimishini, izidingo zokusebenza zezingxenye ezicishiwe nezipholile azifani nhlobo ngenxa yezimo zazo ezihlukene zokucindezeleka. Izingxenye ezihlukahlukene ezicishiwe nezishisayo kufanele zibe nezakhiwo ezinhle kakhulu zemishini, okungukuthi inhlanganisela efanelekile yamandla aphezulu kanye nokuqina okuphezulu, ukuqinisekisa ukusebenza kahle kwesikhathi eside kwezingxenye.
Ukucisha kuyisinyathelo sokuqala senqubo, futhi izinga lokushisa lokushisa lincike ekubunjweni kwensimbi, kuyilapho i-medium quenching ikhethwa ngokusekelwe ekuqina kwensimbi kanye nobukhulu bengxenye yensimbi. Ngemuva kokucisha, ukucindezeleka kwangaphakathi kwensimbi kuphezulu futhi ku-brittle, futhi ukufudumala kuyadingeka ukuqeda ukucindezeleka, ukwandisa ukuqina, nokulungisa amandla. I-Tempering iyinqubo ebaluleke kakhulu yokujwayela izakhiwo zemishini yensimbi ecishiwe futhi enomoya. Ijika lezakhiwo zemishini yezinsimbi ezihlukahlukene ezishintshayo nezinga lokushisa elishisayo, elaziwa nangokuthi ijika elishisayo lensimbi, lingasetshenziswa njengesisekelo sokukhetha izinga lokushisa elishisayo. Ukuze uthole ukushisa okuphezulu kokushisa kwe-alloy ethile ecishiwe kanye nezinsimbi ezishisayo, kufanele kuqashelwe ukuvimbela ukuvela kohlobo lwesibili lwe-teer brittleness ukuqinisekisa ukusebenziseka kwensimbi. [2]
Ukwelashwa kokucisha nokushisa kusetshenziswa kabanzi ezingxenyeni zesakhiwo ezidinga ukusebenza okuhle kakhulu okubanzi, ikakhulukazi lezo ezisebenza ngaphansi kwemithwalo eshintshanayo, njengamashafu ezimoto, amagiya, ama-turbine shafts ezinjini zendiza, ama-compressor disc, njll. Izingxenye zensimbi zesakhiwo ezidinga ukucishwa kokushisisa ngokuvamile ziyacishwa futhi zithukutheliswe ngaphambi kokucinywa kwendawo ukuze kutholwe i-sorbate ecolekile nefanayo, ezuzisa ungqimba oluqinile olungaphezulu futhi ingafinyelela izici ezinhle eziphelele zemishini emnyombweni. Izingxenye ze-nitride zithola ukwelashwa kokucisha nokushisa ngaphambi kwe-nitriding, engathuthukisa ukusebenza kwensimbi futhi ilungiselele isakhiwo se-nitriding. Ukuze uzuze ukushelela okuphezulu kwethuluzi lokulinganisa ngaphambi kokucisha, susa ukucindezeleka okubangelwa umshini onzima, unciphise ukuguqulwa kokucisha, futhi wenze ubulukhuni ngemva kokucisha ukushisa okuphezulu nokufana, ukwelashwa kokucisha kanye nokushisa kungenziwa ngaphambi kokucubungula ngokunemba. Okwezinsimbi zamathuluzi ezinama-carbides enethiwekhi noma okusanhlamvu okumahhadla ngemva kokufoja, ukucisha kanye nokwelashwa okufudumalayo kungasetshenziswa ukuze kuqedwe inethiwekhi ye-carbide futhi kucwengisiswe okusanhlamvu, kuyilapho i-spheroid zing i-carbides ukuze kuthuthukiswe ukusebenza kahle nokulungiselela i-microstructure yokwelashwa kokushisa kokugcina.
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Isikhathi sokuthumela: Oct-31-2023
