Tasirin Matsi da Zafin Jiki akan Halayen Karfe
Karfe muhimmin abu ne a rayuwar zamani, tun daga ginin gini da aikace-aikacen mota zuwa kayan aiki na gida da kayan fasaha na zamani kamar turbines, reactors, da na'urorin lantarki. Ƙarfin ƙarfe yana cikin haɗakar halayen injiniya da na zahiri: ƙarfi, juriya, wutar lantarki da zafin jiki, da sauƙin siffantawa ta hanyar hanyoyin kera. Duk da haka, waɗannan kaddarorin ba a gyara su ba. Abubuwa biyu na muhalli da tsari waɗanda galibi ke ƙayyade canje-canje a cikin halayen ƙarfe sune matsin lamba da zafin jiki. Waɗannan na iya canza tsarin ƙananan abubuwa, shafar haɗin atomic, canza matakan lu'ulu'u, kuma a ƙarshe suna tantance ko ƙarfen zai yi ƙarfi, ya fi karyewa, ko ma ya gaza.
1. Tsarin ƙananan abubuwa a matsayin Mabuɗin Canje-canje ga Kadara
Domin fahimtar tasirin matsin lamba da zafin jiki, muna buƙatar duba ƙarfe a ƙananan sikelin. Karfe yana ƙunshe da ƙwayoyin lu'ulu'u da aka raba ta hanyar iyakokin hatsi. A cikin lu'ulu'u, lahani kamar nakasa suna taka muhimmiyar rawa a cikin nakasa ta filastik. Lokacin da ƙarfe ya fuskanci nauyi, nakasa tana faruwa ne ta hanyar motsi na nakasa. Zafin jiki da matsin lamba na iya hanzarta ko hana motsi na waɗannan nakasa, da kuma canza girman hatsi da adadin lahani da aka samu. Saboda haka, ƙananan canje-canje a yanayin aiki na iya haifar da manyan canje-canje a ƙarfi, juriya, tauri, da juriya ga lalacewa.
2. Tasirin Zafin Jiki akan Sifofin Karfe
a. Ƙarfi da Tauri
Gabaɗaya, ƙaruwar zafin jiki yana rage ƙarfi da tauri na ƙarfe. A yanayin zafi mai yawa, ƙwayoyin halitta suna yin rawar jiki sosai, wanda hakan ke sa haɗin da ke tsakanin ƙwayoyin halitta ya zama "mai motsi." Rushewar ƙwayoyin halitta yana motsawa cikin sauƙi, wanda hakan ke sa ƙarfen ya fi saurin lalacewa. Wannan shine dalilin da ya sa ƙarfen da yake da ƙarfi a yanayin zafi na ɗaki zai iya yin rauni a yanayin zafi mai yawa, misali a cikin sassan injin ko bututun tururi.
A akasin haka, a yanayin zafi mai ƙasa, ƙarfe yana ƙara ƙarfi saboda gurɓacewar yanayi yana da wahalar motsawa. Duk da haka, wannan ƙaruwar ƙarfi sau da yawa yana zuwa da wani sakamako: wani abu da ya rage shi ne ƙaruwar karyewar wasu ƙarfe.
b. Tauri da Tauri
Ductility yawanci yana ƙaruwa da ƙaruwar zafin jiki, domin ƙarfe yana samun sauƙin nakasawa ba tare da ya karye ba. A cikin samar da ayyuka kamar ƙirƙira ko birgima mai zafi, ana dumama ƙarfe don ya zama mai laushi don a iya siffanta su ba tare da fashewa ba.
A yanayin zafi mai ƙasa, wasu ƙarfe (musamman waɗanda ke da tsarin BCC kamar ƙarfen carbon) suna fuskantar sauyi daga ƙasa zuwa ƙasa. Wannan yana nufin cewa ƙasa da wani yanayi na zafi, ƙarfen na iya zama mai rauni sosai. Wannan yana da mahimmanci don amfani a cikin yanayin sanyi (misali, gine-ginen ruwa, gadoji a yankunan dusar ƙanƙara) saboda haɗarin karyewar ƙarfe yana ƙaruwa.
c. Wutar Lantarki da Tsarin Zafi
Zafin jiki kuma yana shafar ikon ƙarfe na gudanar da wutar lantarki da zafi. Gabaɗaya, ƙarfin lantarki na ƙarfe yana raguwa yayin da zafin jiki ke ƙaruwa. Wannan yana faruwa ne saboda girgizar zafin atoms yana hana kwararar electrons kyauta. Saboda wannan ƙa'ida, juriyar wayar jan ƙarfe tana ƙaruwa lokacin da aka yi zafi, kuma na'urorin lantarki suna buƙatar la'akari da tasirin dumama don guje wa asarar wutar lantarki mai yawa.
d. Canje-canje na Mataki da Canje-canjen Tsarin
Wasu karafa da ƙarfe suna fuskantar sauye-sauye a wani yanayi na musamman a cikin wani yanayi na zafin jiki. Misali na yau da kullun shine ƙarfe: a wasu yanayin zafi, tsarin lu'ulu'u yana canzawa (misali, daga ferrite zuwa austenite). Wannan canjin lokaci yana shafar halayen injiniya sosai. Tsarin maganin zafi kamar annealing, quetching, da tempering ya dogara ne akan sarrafa zafin jiki don cimma haɗin da ake so na tauri da tauri.
e. Rarrafe da Lalacewar Zafi na Dogon Lokaci
A yanayin zafi mai yawa da kuma yawan lodi, karafa na iya fuskantar rarrafe, wani nau'in nakasa da ke faruwa a hankali a tsawon lokaci. Rarrafe yana da matukar muhimmanci musamman a cikin injinan iskar gas, tukunyar ruwa, da kuma sassan injinan samar da wutar lantarki. Ko da yake damuwar ta ci gaba da kasancewa, karfen yana "gudu a hankali," yana haifar da canje-canje a girma da kuma gazawar da ka iya fuskanta. Saboda haka, ƙirar sassan zafin jiki mai yawa dole ne ta yi la'akari da halayen rarrafe, ba kawai ƙarfin takura a zafin ɗakin ba.
3. Tasirin Matsi Kan Sifofin Karfe
Matsi a cikin mahallin kayan na iya nufin matsin lamba na hydrostatic (wanda aka yi amfani da shi daidai gwargwado daga kowane bangare) ko matsin lamba saboda nauyin injina kamar matsi da hulɗa. Sau da yawa ana ganin tasirin matsin lamba akan halayen ƙarfe a cikin samuwar filastik, canje-canjen yawa, da kwanciyar hankali na lokaci.
a. Ƙara yawan yawa da rufewar ramuka
Babban matsin lamba na iya haifar da matsewa, musamman a cikin kayan da aka yi da foda (foda metallurgy). A cikin tsarin sintering da zafi na matsewa na isostatic (HIP), ana amfani da matsin lamba don rufe ramuka na ciki, ƙara yawan yawa, da inganta halayen injiniya kamar ƙarfin gajiya da tauri. Karafa masu yawa suna da wahalar ƙirƙirar hanyoyin tsagewa, wanda hakan ke sa su zama abin dogaro.
b. Tasirin Canzawar Roba
Matsi, musamman matsi, yana ƙara ƙarfin ƙarfe na sake lalacewa ba tare da fashewa ba. Wannan saboda tsagewa suna buɗewa cikin sauƙi a ƙarƙashin matsin lamba fiye da lokacin matsi. A cikin ayyukan fitarwa ko ƙirƙira, haɗakar matsin lamba mai yawa yana taimakawa kwararar abu da cika mold yadda ya kamata. Matsi kuma na iya haɓaka taurarewar aiki a ƙarƙashin wasu yanayi, saboda tarin gurɓatattun abubuwa da suka faru sakamakon nakasa.
c. Canjin Matakin da Matsi Ya Jawo
Babban matsin lamba na iya daidaita wasu matakai ko ma haifar da sababbi. Duk da cewa wannan tasirin an fi tattauna shi a cikin ma'adanai da kayan da ba na ƙarfe ba, wasu karafa kuma na iya fuskantar canje-canje a cikin tsarin lu'ulu'unsu a ƙarƙashin matsin lamba mai yawa. A cikin ayyukan masana'antu, wannan tasirin yana faruwa a cikin matakai na musamman ko yanayi mai tsauri, misali, a cikin sassan da ke aiki a matakin teku, tsarin matsin lamba mai yawa, ko a cikin binciken kayan aiki a dakin gwaje-gwaje.
d. Tasiri akan Wurin Narkewa da Yaɗuwa
Matsi gabaɗaya yana ɗaga wurin narkewar ƙarfe, kodayake tasirin ba koyaushe yake da mahimmanci a matsin lamba da aka saba gani a masana'antu ba. Bugu da ƙari, matsin lamba na iya shafar saurin yaduwar atomic, musamman idan aka haɗa shi da zafin jiki. Yaɗuwa yana da mahimmanci a cikin hanyoyin kamar walda, sintering, da kuma shafa saman (misali, maganin yaɗuwa).
4. Hulɗar Matsi da Zafin Jiki: Haɗaɗɗen Tasiri
A aikace-aikace da yawa na zahiri, matsin lamba da zafin jiki suna aiki tare. Misali, a cikin ƙera ƙwai mai zafi, ana dumama ƙarfe don ya zama mai laushi, sannan a matse shi da ƙarfi don samar da mold. A cikin abubuwan da ke cikin turbine, ƙarfe yana fuskantar yanayin zafi mai yawa da damuwa (wanda ya shafi matsin lamba/kaya) tsawon shekaru. Wannan haɗin zai iya hanzarta rarrafe, oxidation, da lalacewar ƙananan abubuwa.
Haɗin matsin lamba da zafin jiki shi ma yana ƙayyade saurin murmurewa, sake sake ginawa, da kuma girman hatsi. Lokacin da ƙarfe ya fuskanci lalacewar filastik, tarkace suna taruwa. Idan daga baya aka yi zafi, ƙarfen zai iya sake sake ginawa: sabbin hatsi suna fitowa kuma halayensa suna ƙara yin aiki amma ƙarfinsa yana raguwa. Nan ne sarrafa sigogin tsari ya zama mahimmanci don cimma halayen ƙarshe da ake so.
5. Tasirin da ke tattare da Tsarin Kera da Zane
Fahimtar tasirin matsin lamba da zafin jiki yana ba mu damar inganta hanyoyin aiki da kuma hana lalacewa. A lokacin ƙirƙirar hanyoyin aiki, zaɓin zafin aiki yana ƙayyade kuzarin da ake buƙata, ingancin saman, da kuma yiwuwar fashewa. A cikin walda, shigar zafi yana shafar yankin da zafi ya shafa (HAZ), girman hatsi, da kuma samuwar matsin lamba na sauran abubuwa. A halin yanzu, dole ne a yi la'akari da matsin lamba na aiki da nauyin da ke ƙarƙashin yanayin aiki don hana fashewa ko karyewar abu.
A fannin ƙirar injiniya, zaɓin ƙarfe sau da yawa yana dogara ne akan daidaiton halaye akan zafin jiki da matsin lamba. Misali, ana zaɓar superalloys na nickel don yanayin zafi mai yawa saboda suna ba da juriya mai kyau ga rarrafe. Ana zaɓar wasu ƙarfe don yanayin sanyi saboda suna ba da isasshen ƙarfi a ƙananan yanayin zafi.
Kammalawa
Matsi da zafin jiki muhimman abubuwa ne guda biyu da za su iya canza halayen ƙarfe sosai. Zafin jiki yana shafar motsin katsewa, sauye-sauyen yanayi, watsa wutar lantarki, da kuma abubuwan da ke faruwa na dogon lokaci kamar su rarrafe. Matsi yana shafar yawan abu, nakasa, porosity, kuma, a ƙarƙashin yanayi mai tsanani, yana iya canza yanayin lu'ulu'u. A aikace-aikacen masana'antu da yawa, waɗannan abubuwa biyu suna aiki a lokaci guda, don haka tasirinsu na haɗin gwiwa yana ƙayyade aikin ƙarshe na kayan. Ta hanyar fahimtar alaƙar da ke tsakanin matsin lamba, zafin jiki, da ƙananan tsari, injiniyoyi da masu aikin masana'antu za su iya zaɓar kayan da suka dace, hanyoyin sarrafawa, da kuma tsara abubuwan da suka dace da aminci da dorewa.
Idan kuna so, zan iya daidaita wannan labarin ya zama mafi "fasaha" (tare da zane-zanen ra'ayi, daidaitattun daidaito, da takamaiman misalan ƙarfe) ko kuma ya fi "shahara" ga mai karatu na gaba ɗaya.
