Ukulungiswa kwengxenye yokubumba

I-normalizing iwukwelapha ukushisa okuthuthukisa ukuqina kwensimbi.Ngemva kokushisisa izingxenye zensimbi ezingeni lokushisa elingu-30-50 ℃ ngaphezu kwezinga lokushisa le-Ac3, zibambe isikhathi esithile futhi nomoya zizipholise ziphume esithandweni.Isici esiyinhloko ukuthi izinga lokupholisa liyashesha kunokukhipha isisu kodwa liphansi kunokucisha.Ngesikhathi sokujwayelekile, izinhlamvu ze-crystalline zensimbi zingacwengwa ngenqubo yokupholisa esheshayo, engazuzi nje kuphela amandla agculisayo, kodwa futhi ithuthukise kakhulu ukuqina (inani le-AKV) futhi inciphise ukuthambekela kwezingxenye zokuqhekeka Ngemva kokujwayelekile, izici ezibanzi zemishini. kwamanye amapuleti ensimbi ashisayo ashisayo ashisayo, insimbi ephansi ye-alloy forgings, kanye nokubunjwa kungathuthukiswa kakhulu, kanye nokusebenza kokusika kungathuthukiswa.

I-normalizing isetshenziselwa ikakhulukazi izingcezu zensimbi.Ukujwayela nokufakwa kwensimbi evamile kuyefana, kodwa izinga lokupholisa liphakeme kancane futhi i-microstructure icolekile.Ezinye izinsimbi ezinezinga lokupholisa elibucayi eliphansi kakhulu zingaguqula i-austenite ibe i-martensite ngokupholisa emoyeni.Lokhu kwelashwa akujwayeleki futhi kubizwa ngokuthi ukucisha ukupholisa umoya.Ngokuphambene nalokho, ezinye izinto zokusebenza ezinkulu ze-cross-section ezenziwe ngensimbi ezinezinga eliphezulu lokupholisa elibucayi azikwazi ukuthola i-martensite ngisho nangemva kokucisha emanzini, futhi umphumela wokucisha useduze nokujwayelekile.Ukuqina kwensimbi ngemva kokujwayelekile kuphakeme kunalokho ngemva kokukhishwa kwe-annealing.Lapho kujwayelekile, akudingekile ukupholisa i-workpiece esithandweni somlilo njenge-annealing, ethatha isikhathi esifushane somlilo futhi inokukhiqiza okuphezulu.Ngakho-ke, ekukhiqizeni, i-normalization ivame ukusetshenziswa esikhundleni sokudonsa ngangokunokwenzeka.Ngensimbi enekhabhoni ephansi enokuqukethwe kwekhabhoni engaphansi kuka-0.25%, ubulukhuni obuzuzwa ngemuva kokujwayelekile bumaphakathi futhi bulungele ukusika kunokudonsa.I-normalizing ngokuvamile isetshenziselwa ukusika kanye nokulungiselela umsebenzi.Ngensimbi ye-carbon ephakathi ne-carbon content ka-0.25-0.5%, ukujwayelekile kungase futhi kuhlangabezane nezidingo zokusika ukucutshungulwa.Ezingxenyeni ezingasindi ezenziwe ngalolu hlobo lwensimbi, i-normalization ingasetshenziswa futhi njengokwelashwa kokushisa kokugcina.Ukwenza kujwayelekile insimbi yensimbi ye-carbon ephezulu kanye nensimbi enensimbi ukususa ama-carbide enethiwekhi esakhiweni futhi kulungiselelwe ukwakheka kwe-periodization annealing.

Ukwelashwa kokugcina kokushisa kwezingxenye ezivamile zesakhiwo, ngenxa yezakhiwo ezingcono kakhulu zemishini ye-workpiece ngemva kokujwayelekile uma kuqhathaniswa nesimo esifakwe emanzini, kungasetshenziswa njengokwelashwa kokushisa kokugcina kwezinye izingxenye ezijwayelekile zesakhiwo ezinokucindezeleka okuphansi kanye nezidingo zokusebenza, ukunciphisa izinqubo. , yonga amandla, futhi uthuthukise ukusebenza kahle kokukhiqiza.Ukwengeza, ezingxenyeni ezithile ezimise okwezinkulu noma eziyinkimbinkimbi, lapho kunengozi yokuqhekeka ngesikhathi sokucisha, ukujwayela ngokuvamile kungase kuthathele indawo yokwelashwa kokucisha nokushisa njengokwelashwa kokushisa kokugcina.

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Grace Ma