Ilimi- Kintai

I. Bayanin Ra'ayin Recrystallization

1. Recrystallization yana nufin tsarin crystallization na m karafa da gami ba tare da canji lokaci. Hanya ce ta sassauta karafa ko gami da aka yi taurin aiki ba tare da canjin lokaci ba.

2. Bayan nakasar sanyi ta faru a cikin fitar da karfe sannan kuma ta dumama zuwa wani zafin jiki, sabbin hatsi da ba su da kyau za a sake farfado da su a cikin nakasassun tsarin, kuma kadarorinsa za su canza sosai, suna komawa zuwa yanayin laushi gaba daya. Ana kiran wannan tsari recrystallization. Wato recrystallization shine tsarin ƙaddamar da ƙwayar cuta da haɓakar ƙwayoyin kristal iri-iri.

3. Tsarin farko da ke faruwa a lokacin recrystallization shine tsarin dawowa. A wannan mataki, atom ɗin suna fuskantar ƙayyadaddun yaduwa da ƙaura, kuma lahani kawai suna motsawa. Ƙauransu da haɗin kai suna taimakawa wajen kawar da damuwa na ciki da ke haifar da nakasar sanyi. Duk da haka, halayen nakasar sanyi har yanzu suna wanzu, kuma kawai wasu ƙananan sassa da kaddarorin jiki suna canzawa, tare da wani ɓangaren makamashi da aka adana yayin nakasar sanyi.

4. Mayar da hankali kuma ana iya kiransa damuwa da damuwa.

5. Bayan tsarin dawowa ya faru, idan karfe yana mai tsanani zuwa zafin jiki mafi girma, iyawar watsawa da ƙaura na atoms ya karu, kuma sababbin hatsi za su yi watsi da su (kamar yadda aka nuna a cikin Hoto 3) kuma suyi girma a cikin hatsi mai laushi, tare da duk damuwa na ciki gaba daya saki. Ana kiran wannan mataki recrystallization.

6. Bayan an kammala recrystallization, hatsi na al'ada ya kamata su kasance daidai da ci gaba. Duk da haka, a wasu lokuta, ci gaban hatsi shine kawai kwatsam da sauri na ƙwanƙwasa wasu 'yan hatsi, wanda ya haifar da karuwar girman bambanci tsakanin hatsi (girman hatsi mara daidaituwa). Wannan ci gaban hatsin da bai yi daidai ba yana kama da faruwar recrystallization a sake a cikin nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau’in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in tsiro yana kama da sake dawowa a cikin nau’in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in tsiro da ke tsirowa a cikin nau’in hatsi mai kyau da aka yi daidai da su bayan sake sakewa, wanda ake kira recrystallization na biyu. Kasuwa gabaɗaya ba sa karɓar kayayyaki tare da ƙaƙƙarfan hatsi da aka samar ta hanyar recrystallization na sakandare gabaɗaya. Don haka, yadda ake sarrafa recrystallization na biyu shine mahimmin batu ga masu fasahar masana'anta.

7. Ƙarfin motsa jiki na recrystallization na farko shine rage yawan makamashin da aka adana saboda nakasawa, yayin da ƙarfin motsa jiki don sake sake sakewa na biyu shine rage yawan makamashi na tsaka-tsakin.

 

II. Zafafan Aiki da Tsarin Hatsi na Aluminum Alloys

1. Idan zafin sarrafa ƙarfen aluminum ya wuce digiri 350 na Celsius, ana kiransa da zafi. Zafi aiki shine tasirin lokaci guda na nau'in sarrafawa da aka adana da kuma annealing mai zafi.

2. The aiki zafin jiki, aiki adadin (kamar extrusion rabo, mirgina rabo ko ƙirƙira rabo), aiki gudun, homogenization jihar, da kuma gami abubuwa ko gami iri duk rinjayar da recrystallization hali.

3. Mafi girman adadin sarrafawa, ƙananan zafin jiki na recrystallization da ƙananan ƙwayar hatsi. Idan adadin sarrafawa ya yi ƙanƙanta, ƙila ba za a iya kammala recrystallization ba saboda yawan zafin jiki na recrystallization, wanda ya haifar da tsarin fibrous ko tsarin gauraye na hatsi da zaruruwa na recrystallized.

4. Mixed recrystallization da fibrous hatsi Tsarin da cewa ba gaba daya recrystallized ana samun yawanci a high-ƙarfi gami, kamar 7000 da 2000 jerin alloys.

5. Idan zafin sarrafawa yayin aiki mai zafi ya yi yawa sosai, adadin kuzarin nakasa ko nakasawa da aka tara yayin sarrafawa zai zama ƙarami sosai, kuma zafin sake kunnawa na kayan tsarin fibrous bayan sarrafa zafin jiki mai yawa zai zama mafi girma. Ga ƙarfe masu ƙarfi kamar ƙarfe masu jerin 2000 da 7000, lokacin da zafin sarrafawa ya wuce 400 ° C, sake kunnawa yayin maganin mafita na gaba zai zama da wahala sosai.

6. Halin recrystallization na simintin ingot mai zafi yayi kama da na aikin sanyi + maganin zafi, amma akwai wasu bambance-bambance. A lokacin aikin sake sakewa na aiki mai zafi, nauyin da aka tara ya riga ya kasance kadan sosai, don haka wasu kayan daɗaɗɗen kayan aiki ba za a iya sake sake su gaba ɗaya ba bayan aiki mai zafi.