Rarrabuwa na Bakin Karfe

Ana iya raba bakin karfe zuwa austenitic bakin karfe, ferritic bakin karfe, martensitic bakin karfe da duplex bakin karfe bisa ga tsarin karfe.

(1) Bakin ƙarfe na Austenitic

Tsarin zafin ɗakin ƙarfe mai siffar austenitic shine austenite, wanda aka samar ta hanyar ƙara nickel mai dacewa ga ƙarfe mai girman chromium.

Karfe mai launin Austenitic yana da tsari mai ƙarfi na austenitic ne kawai lokacin da Cr ya ƙunshi kusan 18%, Ni 8% zuwa 25%, da C kusan 0.1%. Karfe mai launin Austenitic ya dogara ne akan ƙarfe mai launin Cr18Ni9. Tare da amfani daban-daban, an ƙirƙiri jerin ƙarfe shida na austenitic.

Yawancin maki na bakin karfe na austenitic:
(1) 1Cr17Mn6Ni15N; (2) 1Cr18Mn8Ni5N; (3) 1Cr18Ni9; (4) 1Cr18Ni9Si3; (5) 06Cr19Ni10; (6) 00Cr19Ni10; (7) 0Cr19Ni9N; (8) 0Cr19Ni10NbN; (9) 00Cr18Ni10N; (10) 1Cr18Ni12; (11) 0Cr23Ni13; (12) 0Cr25Ni20; (13) 0Cr17Ni12Mo2; (14) 00Cr17Ni14Mo2; (15) 0Cr17Ni12Mo2N; (16) 00Cr17Ni13Mo2N; (17) 1Cr18Ni12Mo2Ti; (18) 0Cr; 1Cr18Ni12Mo3Ti; (20) 0Cr18Ni12Mo3Ti; (21) 0Cr18Ni12Mo2Cu2; (22) 00Cr18Ni14Mo2Cu2; (23) 0Cr19Ni13Mo3; (24) 00Cr19Ni13Mo3; (25) 0Cr18Ni16Mo5; (26) 1Cr18Ni9Ti; (27) (29) 0Cr18Ni; 0Cr18Ni13Si4;

Bakin Austenitic yana ɗauke da adadi mai yawa na Ni da Cr, wanda hakan ke sa ƙarfen ya zama austenite a zafin ɗaki. Yana da kyau a yi amfani da shi, yana da ƙarfi, yana iya yin walda, yana da juriya ga tsatsa da kuma rashin ƙarfin maganadisu ko kuma rauni. Yana da juriya ga tsatsa wajen yin iskar oxygen da rage watsawa. Ana amfani da shi wajen yin kayan aiki masu jure wa acid, kamar kwantena masu jure wa tsatsa da kuma rufin kayan aiki da jigilar su. Ana iya amfani da bututu, sassan kayan aiki masu jure wa nitric acid, da sauransu, a matsayin babban kayan ado. Bakin Austenitic gabaɗaya yana ɗaukar maganin mafita, wato, ana dumama ƙarfen zuwa 1050 zuwa 1150°C, sannan a sanyaya shi da ruwa ko a sanyaya shi da iska don samun tsarin austenite mai matakai ɗaya.

(2) ƙarfe mai kama da ferritic

Matakan ƙarfe mai kama da ferritic da ake amfani da su akai-akai: (1) 1Cr17; (2) 00Cr30Mo2; (3) 00Cr17; (4) 00Cr17; (5) 1Cr17Mo; (6) 00Cr27Mo;

Karfe mai bakin ƙarfe Ferritic bakin ƙarfe ne wanda tsarinsa galibi ferrite ne a zafin ɗaki. Yawan sinadarin Chromium yana da kashi 11%-30%, juriyarsa ta tsatsa, tauri da kuma ƙarfin walda yana ƙaruwa tare da ƙaruwar sinadarin chromium, juriyar tsatsa ta damuwa ta chloride ta fi sauran nau'ikan ƙarfe mai bakin ƙarfe kyau, wannan nau'in ƙarfe gabaɗaya baya ɗauke da nickel, wani lokacin kuma yana ɗauke da ƙaramin adadin Mo, Ti, Nb da sauran abubuwa. Wannan nau'in ƙarfe yana da halaye na babban ƙarfin zafi, ƙaramin ƙimar faɗaɗawa, kyakkyawan juriyar tsatsa, da kuma kyakkyawan juriyar tsatsa ta damuwa. Ana amfani da shi galibi don samar da juriyar yanayi, tururin ruwa, ruwa da acid mai lalata iska. Sassan da suka lalace. Duk da haka, halayen injiniya da aikin sarrafawa ba su da kyau, kuma galibi ana amfani da su a cikin tsarin da ke jure wa acid ba tare da damuwa ba kuma azaman ƙarfe masu hana tsatsa. Hakanan yana iya samar da sassan da ke aiki a yanayin zafi mai yawa, kamar sassan injinan gas.