Hot birgima dangane da sharuddan sanyi-birgima, sanyi-birgima ne a cikin recrystallization zafin jiki a kasa da mirgina, kuma zafi mirgina ne da za'ayi a sama da recrystallization zazzabi mirgina.

Amfani:

zafi birgima iya lalata simintin microstructure na karfe ingot, tace daga cikin crystal hatsi na karfe, da kuma kawar da lahani na microstructure, sabõda haka, da karfe kungiyar compacting, inganta inji Properties.Wannan haɓakawa yana nunawa a cikin jagorar juyawa, don haka karfe ya daina zuwa wani yanki na isotropic;zubar da samuwar kumfa, tsagewa, da kasusuwa, a karkashin yanayin zafi da matsa lamba kuma ana iya haɗa su tare.

Rashin hasara:
1 Bayan zafi mai zafi, abubuwan da ba na ƙarfe ba a cikin ciki na karfe (musamman sulfides da oxides, da silicate) an danna su a cikin takardar, abin mamaki (laminated) ya bayyana.Ƙirƙirar ƙarfe a cikin kauri ta hanyar aikin ja ya lalace sosai, kuma yana iya bayyana a cikin tsagewar walƙiya mai tsagewa.Weld shrinkage ja hankalin gida sau da yawa yakan kai sau da yawa da yawan amfanin gona iri, da iri da yawa girma fiye da lodin lalacewa;
2 Ragowar damuwa sakamakon rashin daidaituwar sanyaya.Damuwar da ta rage ita ce ma'aunin ma'auni na ciki na kai-da-kai a cikin rashin karfin waje, karfe mai zafi na daban-daban na giciye yana da damuwa mai saura irin wannan Yawancin sashi na sassan karfe ya fi girma, mafi girma da damuwa.Ragowar damuwa shine ma'auni na kai-da-kai, amma membobin ƙarfe a cikin aikin ƙarfin waje ko suna da wani tasiri.Irin su nakasawa, kwanciyar hankali, anti-gajiya na iya rashin kyau.
3 Abubuwan ƙarfe masu zafi da aka yi birgima, ƙarancin iko na kauri da faɗin gefen.Mun saba da thermal fadada da ƙanƙancewa, ko da farkon zafi-birgima fita ne misali tsawon, kauri, ko za a yi wasu korau karshe bayan sanyaya, wannan korau bambancin gefen nisa fadi da kara kauri daga cikin yi na wasan kwaikwayon na karin bayyane.Don haka don babban karfe don faɗin bakin karfe, kauri, tsayi, kwana, da gefe babu wata doka da ke buƙatar madaidaicin madaidaicin.Hot-birgima karfe general karfe, low da matsakaici matsa lamba tukunyar jirgi bututu, high matsa lamba tukunyar jirgi bututu, karfe bututu, bakin karfe bututu, mai fatattaka bututu, geological karfe bututu da sauran karfe bututu.