Hardenability da taurin su ne fihirisar aikin da ke nuna ikon kashewaƙirƙira, kuma su ne mahimmin tushe don zaɓar da amfani da kayan.Taurishine iyakar taurin da aƙirƙiraiya cimma a karkashin manufa yanayi.Babban factor kayyade hardening mataki naƙirƙirashine abun ciki na carbonƙirƙira, ko fiye daidai da carbon abun ciki na m bayani a austenite a lokacin quenching da dumama.Mafi girman abin da ke cikin carbon shine, mafi girman matakin ƙarfin ƙarfe na ƙarfe zai kasance.Ko da yake abubuwan da ke tattare da ƙarfe a cikin ƙarfe ba su da tasiri sosai akan ƙarfin ƙarfe, suna da tasiri mai yawa akan ƙarfin ƙarfe.
Hardenability shine halayyar da ke ƙayyade zurfin da taurin rarraba taurin ƙarfe a ƙarƙashin ƙayyadaddun ƙayyadaddun yanayi. Wato, ikon samun zurfin daɗaɗɗen daɗaɗɗen lokacin da karfe ya taurare, wanda shine ainihin dukiya na karfe.Hardenability a zahiri yana nuna Sauƙaƙan abin da austenite za'a iya canza shi zuwa martensite lokacin da ƙarfe ya ƙare. Yana da alaƙa da kwanciyar hankali na supercooled austenite a cikin ƙarfe, ko zuwa ƙimar sanyaya mai mahimmanci a ciki.ƙirƙira karfe.

Bayan quenching, da metallographic tsarin da taurin rarraba masu lankwasa ana lura a kan giciye sashe na sanyaya matsakaici.Layin sashe shine martensite kuma ragowar an raba shi zuwa wuraren da ba Martensite ba, watau, tsarin kafin quenching. Ana iya gani daga adadi cewa yankin martensite na sandar karfe a hannun dama ya fi zurfi, don haka taurinsa ya fi kyau. Ƙaƙƙarfan martensite na kayan da ke gefen hagu ya fi girma, wato, hardening ya fi kyau.Yawan kwantar da hankali na sashin ƙirƙira ya bambanta daga wuri zuwa wuri a lokacin quenching. Saurin sanyi na saman shine matsakaicin, kuma saurin sanyi ya ragu. yayin da cibiyar ta isa tsakiya.Idan saurin sanyaya na saman da tsakiyar ƙirƙira ya fi girma mai mahimmancin sanyaya saurin ƙarfe na ƙirƙira, ana iya samun tsarin martensite tare da duk sashin ƙirƙira, wato, ƙirar ƙarfe ta ƙare gaba ɗaya. Idan Sashin tsakiya yana ƙasa da ƙimar sanyi mai mahimmanci, ana samun martensite a saman kuma ana samun nama maras Martensitic a cikin zuciya, yana nuna cewa ƙirƙira ƙarfe ba ta ƙare ba.
A cikin samarwa, ingantaccen hardenability na karfeƙirƙirayawanci ana bayyana shi ta zurfin zurfin Layer mai ƙarfi mai tasiri, wato, nisa na tsaye daga saman da aka auna zuwa 50% (ƙarashin juzu'i) na martensite. Hakanan yana da amfani don auna nisa ta tsaye daga saman zuwa ƙayyadadden taurin zuwa nuna zurfin ingantacciyar taurin Layer.Misali, zurfin hardening induction (DS) da zurfin jiyya na zafin jiki (DC) ana auna ta ta nisa na tsaye daga saman zuwa ƙayyadadden taurin.
Rarraba inji sassa makamashi bayan quenching da tempering naƙirƙiratare da daban-daban hardenability aka nuna a cikin Figure.High hardenability na inji Properties tare da giciye sashe ne uniform rarraba, da kuma quench shigar azzakari cikin farji na low, low inji Properties na zuciya, tauri ne m.Wannan shi ne saboda bayan tempered.karfe forgingstare da high hardenability, su tsarin daga surface zuwa ciki ne granular tempered Soxhlet, wanda yana da high bremsstrahlability, yayin da karfe tare da low hardenability yana flaccid ferrite a zuciyarsa, wanda yana da low bremsstrahlability.
(daga duan168.com)