Shin bakin karfe na maganadisu?

Mutane da yawa suna tunanin cewa bakin karfe ba maganadisu ba ne, kuma galibi suna amfani da maganadisu don gano ko samfurin bakin karfe ne. Wannan hanyar hukunci a zahiri ba ta kimiyya ba ce.
Bakin karfe za a iya raba kashi biyu bisa ga tsarin a dakin zafin jiki: austenite da martensite ko ferrite. Nau'in austenitic ba mai maganadisu ba ne ko kuma mai rauni mai rauni, kuma nau'in martensite ko ferritic shine Magnetic. A lokaci guda, duk bakin karfe na austenitic na iya zama gaba daya maras maganadisu kawai a cikin yanayi mara kyau, don haka ba za a iya tantance sahihancin bakin karfe ta hanyar maganadisu kadai ba.
Dalilin da ya sa austenitic karfe ne Magnetic: austenitic bakin karfe kanta yana da fuska-tsakiyar siffar cubic crystal tsarin, da kuma surface na tsarin ne paramagnetic, don haka austenitic tsarin ba Magnetic. Ciwon sanyi shine yanayin waje wanda ke juya wani ɓangare na austenite zuwa martensite da ferrite. Gabaɗaya magana, adadin nakasawa na martensite yana ƙaruwa tare da haɓaka adadin ƙarancin sanyi da rage yawan zafin jiki na lalata. Wato mafi girman nakasar aikin sanyi, da ƙarin canji na martensitic kuma mafi ƙarfi da abubuwan maganadisu. Hot-kafa austenitic bakin karfe ne kusan ba Magnetic.

Matakan tsari don rage karɓuwa:
(1) Ana sarrafa abun da ke cikin sinadarai don samun ingantaccen tsarin austenite da daidaita ƙarfin maganadisu.
(2) Haɓaka jerin abubuwan shirye-shiryen magani. Idan ya cancanta, martensite, δ-ferrite, carbide, da dai sauransu a cikin matrix austenite za'a iya sake narkar da su ta hanyar ingantaccen maganin maganin maganin don yin tsarin ya fi dacewa kuma tabbatar da cewa magnetic permeability ya dace da bukatun. Kuma barin wani tazara don aiki na gaba.
(3) Daidaita tsari da hanya, ƙara tsarin maganin maganin bayan yin gyare-gyare, kuma ƙara jerin pickling zuwa hanyar aiwatarwa. Bayan pickling, gudanar da gwajin ƙarfin maganadisu don biyan buƙatun μ (5) Zaɓi kayan aikin da suka dace da kayan aiki da kayan aiki, kuma zaɓi kayan aikin yumbu ko kayan aikin carbide don hana tasirin maganadisu na kayan aikin daga tasirin maganadisu na kayan aiki. A cikin aikin injin, ana amfani da ƙaramin adadin yankan gwargwadon yadda zai yiwu don rage faruwar canjin martensitic wanda ya haifar da matsananciyar matsananciyar damuwa.
(6) Degausing na kammala sassa.