Lokacin da aka sanyaya assy mara amfani, ana samun farar fata sau da yawa akan saman da sassan bakin ciki.
Tsarin farin bakin yana da wuya kuma yana da rauni, tare da rashin aikin sarrafawa da sauƙin kwasfa.
Don haka, dole ne a yi amfani da annealing (ko daidaitawa) don kawar da farar fata.Annealing tsari ne: dumama zuwa 550-950 ℃ na 2-5 hours, sa'an nan tanderun sanyaya zuwa 500-550 ℃ sa'an nan iska sanyaya.A lokacin babban lokacin riƙe zafin jiki, siminti mai zafi mai zafi da siminti eutectic sun lalace zuwa graphite da A, da siminti na biyu da siminti eutectoid suma sun lalace yayin tsarin sanyaya na gaba, wanda ya haifar da tsari na graphitization.Saboda bazuwar siminti, taurin yana raguwa, don haka inganta machinability.
Normalizing na ductile baƙin ƙarfe
Manufar ductile baƙin ƙarfe normalizing ne don samun pearlite matrix tsarin, tace hatsi da kuma uniform tsarin, don inganta inji Properties na Dandong karfe simintin gyaran kafa.Wani lokaci normalizing ne kuma shirye-shiryen na ductile baƙin ƙarfe surface quenching a kan tsarin, normalizing aka raba zuwa high zafin jiki normalizing da low zazzabi normalizing.A high zazzabi normalizing zazzabi kullum ba ya wuce 950 ~ 980 ℃, da kuma low zazzabi normalizing zazzabi ne kullum mai tsanani zuwa jimlar nadawa zazzabi kewayon 820 ~ 860 ℃.Bayan daidaitawa, ana buƙatar mutane huɗu gabaɗaya don magance shi don kawar da damuwa na ciki da aka haifar yayin daidaitawa.
surface hardening
Domin inganta taurin saman, sa juriya da ƙarfin gajiyar wasu taruka masu jagora, ana iya amfani da quenching.Dukansu simintin gyare-gyare na ƙarfe mai launin toka da simintin ƙarfe na ductile na iya taurare.Gabaɗaya, babban (matsakaicin) mitar shigar da dumama saman quenching da wutar lantarki ana amfani da saman quenching.
Tsarin nau'in akwatin nau'in harsashi marar amfani yana da siffa da jefa shi ta alkali phenolic guduro yashi ko aikin yashi gilashin ruwa.Bayan matrix daidaitawa da layin dogo matsakaicin mitar shigar da maganin zafi, taurin saman ya kai HRC48-58, kuma zurfin taurin yana sama da 4-6mm (HRC45).Yana da sturdiness don tsayayya da babban tasiri da juriya na lalacewa saboda yanayin aiki mai tsanani.
Lokacin aikawa: Afrilu-23-2022
