Ukuqamba incazelo yokuthulisa kanye nenjongo yokuqamba mahhala

Ukuqamba mahhalainsimbi inezindawo ezintathu ezilandelayo ezibalulekile ngaphansi kwesimo sokucisha.
(1) Izici zesakhiwo
Ngokusho kobukhulu bensimbi, ukushisa okushisa, isikhathi, izici zokuguqulwa kanye nemodi yokupholisa, isakhiwo sensimbi esicishiwe kufanele sihlanganiswe ne-martensite noma i-martensite + i-austenite esele, ngaphezu kwalokho, kungase kube ne-carbide encane engancibilikisiwe. Kokubili i-martensite kanye ne-austenite eyinsalela kusesimweni sokumetastable ezingeni lokushisa legumbi, futhi kuvame ukushintshela esimweni esizinzile se-ferric mass plus cementite.
(2) Izici zokuqina
Ukuhlanekezela kwe-lattice okubangelwa ama-athomu ekhabhoni kuvezwa ubulukhuni, okwandayo nge-supersaturation, noma okuqukethwe kwekhabhoni. Ukucisha ubulukhuni besakhiwo, amandla aphezulu, ipulasitiki, ukuqina okuphansi.
(3) Izici zokucindezeleka
Kubandakanya ukucindezeleka okuncane nokucindezeleka okukhulu, okokuqala kuhlobene nokuhlanekezela kwe-lattice okubangelwa ama-athomu e-carbon, ikakhulukazi nge-carbon martensite ephezulu ukuze kufinyelele inani elikhulu kakhulu, ukuhlaziywa kwe-quenching martensite esimweni sokucindezeleka esishubile; Lokhu kokugcina kungenxa yomehluko wokushisa owenziwe engxenyeni yesiphambano lapho ucisha, indawo yokusebenza noma isikhungo sesimo sokucindezeleka sihlukile, kukhona ukucindezeleka okuqinile noma ukucindezeleka okucindezelayo, ku-workpiece ukuze ugcine ibhalansi. Uma ukucindezeleka kwangaphakathi kwezingxenye zensimbi eziqinile kungaqedwa ngesikhathi, kuzodala ukuguqulwa okuqhubekayo ngisho nokuqhekeka kwezingxenye.
Ukufingqa, nakuba i-workpiece ecishiwe inobunzima obuphezulu namandla aphezulu, kodwa idolo likhulu, isakhiwo asizinzile, futhi kukhona ukucindezeleka okukhulu kwangaphakathi okucishiwe, ngakho-ke kufanele kuthukutheliswe ukufaka isicelo. Ngokuvamile, inqubo yokushisa iyinqubo yokulandela yokucisha insimbi, futhi iyinqubo yokugcina kakhulu yenqubo yokulahla okushisayo, inikeza i-workpiece ngemva kwesidingo somsebenzi.
Ukushisa kuyinqubo yokushisisa insimbi eqinile ibe izinga lokushisa elithile elingaphansi kwe-Ac1, ukuyigcina isikhathi esithile, bese uyipholisa ezingeni lokushisa elilingana negumbi. Izinjongo zayo ezibalulekile yilezi:
(1) lungisa ngokunengqondo ubulukhuni namandla ensimbi, uthuthukise ukuqina kwensimbi, ukuze ucezu lokusebenza luhlangabezane nezidingo zohlelo lokusebenza;
(2) isakhiwo esizinzile, ukuze i-workpiece ngesikhathi sokusebenza unomphela ingenzeki ukuguqulwa kwesakhiwo, ukuze kuqiniswe isitayela nobukhulu bomsebenzi;
Ukunciphisa ukucindezeleka kwangaphakathi kwe-workpiece kungancishiswa noma kuqedwe ukuze kuncishiswe ukuguqulwa kwayo nokuvimbela ukuqhekeka.

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Isikhathi sokuthumela: Dec-16-2021