Akwai nau'ikan asali guda biyarbakin karfe:austenitic, ferritic, martensitic, duplex, da hazo hardening.
(1) Austenitic bakin karafa ba maganadisu ba ne, kuma wakilan karfe maki 18% chromium da aka kara da wani adadin nickel da aka kara don ƙara lalata juriya.An yi amfani da matakan ƙarfe da yawa.
(2) Ferrite Magnetic ne, kuma sinadarin chromium shine babban abun ciki, tare da kashi 17%.Wannan abu yana da kyakkyawan juriya na iskar shaka.
(3) Bakin karfe na Martensitic shima Magnetic ne, abinda ke cikin chromium yawanci shine kashi 13%, kuma yana dauke da adadin carbon da ya dace, wanda za'a iya taurare shi ta hanyar kashewa da fushi.
(4) Duplex bakin karfe yana da tsarin gauraye na ferrite da austenite, abun ciki na chromium yana tsakanin 18% da 28%, kuma abun ciki na nickel yana tsakanin 4.5% da 8%.Suna da matukar juriya ga lalata chloride.Sakamako mai kyau.
(5)Abubuwan al'ada na chromium a cikin hazo bakin karfe shine 17, kuma an ƙara wani adadin nickel, jan ƙarfe da niobium, waɗanda za a iya taurare ta hazo da tsufa.
Bisa ga tsarin metallographic, ana iya raba shi zuwa:
(1)Ferritic bakin karfe (400 jerin), chromium bakin karfe, yafi wakilta Gr13, G17, Gr27-30;
(2)Austenitic bakin karfe (300 jerin), chromium-nickel bakin karfe, yafi wakilta 304, 316, 321, da dai sauransu.;
(3)Martensitic bakin karfe (200 jerin), chromium-manganese bakin karfe, babban carbon abun ciki, yafi wakilta 1Gr13, da dai sauransu.
Lokacin aikawa: Satumba-28-2022