Bututun ƙarfe mai laushi yana nufin abun ciki na ƙasa da 0.25% carbon karfe saboda ƙarancin ƙarfinsa, ƙarancin ƙarfi da taushi.Ya haɗa da yawancin ɓangaren ƙarfe na ƙarfe na yau da kullun da ingantaccen tsarin ƙarfe na carbon, galibi ba tare da maganin zafi da aka yi amfani da shi a cikin tsarin injiniya ba, wasu jiyya mai zafi da sauran sassan injin da ake buƙata don lalacewa.M karfe bututu annealing kungiyar ferrite da pearlite ne runtse da ƙarfi da taurin, ductility da taurin.Saboda haka, yanayin sanyi yana da kyau kuma yana iya zama crimping, lankwasawa, naushi da sauran hanyoyin sanyi.Kamar cewa m karfe bututu yana da kyau weldability.Abubuwan da ke cikin Carbon daga 0.10 zuwa 0.30% na ƙarfe mai laushi yana da sauƙin karɓar kowane nau'in sarrafawa kamar ƙirƙira, walda da yanke, wanda aka fi amfani da shi wajen kera sarƙoƙi, rivets, bolts, shafts, da sauransu.

Bututun ƙarfe mai laushi na yau da kullun shine don samar da abubuwan gini, kwantena, tanki, tanderu da kayan aikin gona.Quality m karfe bututu ne don yin mota taksi, kaho da sauran zurfin-ja kayayyakin;Har ila yau, birgima a cikin sanduna, ƙarfin buƙatun don samar da sassa na inji.Kafin amfani da m karfe bututu ne kullum ba da zafi magani, da carbon abun ciki na fiye da 0.15% da carburizing ko cyanide magani, amfani da su bukatar high surface zafin jiki, sa mai kyau shafts, bushings, sprockets da sauran sassa.Saboda ƙarancin ƙarfin ƙarancin ƙarfe na carbon, an iyakance amfani da shi.Dace don haɓaka abun ciki na carbon na manganese da ƙara alamar vanadium, titanium, niobium da sauran abubuwan haɗin gwiwa, na iya haɓaka ƙarfin ƙarfe sosai.Idan ka rage carbon abun ciki na karfe da kuma ƙara karamin adadin aluminum, da kuma karamin adadin boron carbide kafa abubuwa, za ka iya samun ULCB saita high isa ƙarfi, da kuma kula da kyau ductility da taurin.

Low carbon abun ciki na m karfe bututu ne sosai low taurin da matalauta machinability, normalizing tsari na iya inganta machinability.M karfe bututu o ƙarin tabbatar da samun mafi girma timeliness, duka biyu quench tsufa dabi'un, kazalika da hali zuwa iri tsufa.Lokacin da m sanyaya daga wani high zafin jiki karfe, ferritic scraping carbon, nitrogen jikewa, shi kuma iya rage gudu da samuwar baƙin ƙarfe carbonitride ya a dakin da zafin jiki, kuma haka ƙarfi da taurin karfe, da ƙananan ductility da taurin, wani sabon abu da ake kira. kashe tsufa.Ko da ba tare da quenching da ƙananan carbon iska sanyaya zai haifar da tsufa.Samar da adadi mai yawa na ƙananan ƙarfe na carbon ta hanyar nakasawa ferrite daga carbon, nitrogen atom elastic dislocation interactions, carbon, nitrogen atom sarautar da aka taru a kusa da layin da ba daidai ba.Irin wannan hadewar carbon da nitrogen atoms da layin dislocation ana kiranta da iskar iska mai shekaru Coriolis (Ke lop air mass).Zai ƙara ƙarfi da taurin ƙarfe yayin rage ductility da tauri, al'amarin da aka sani da tsufa.Fiye da kashe tsufa na bututun ƙarfe mai laushi a lokacin nakasar filastik da tauri mafi girma hatsari a cikin lanƙwan ƙwanƙwasa yana da bayyananniyar matsayi na sama da ƙasa.Tun da yawan amfanin ƙasa a kan yawan amfanin ƙasa batu elongation faruwa har zuwa karshen, bayyana mara kyau saboda m surface tare da folds kafa a saman da samfurin, da ake kira Luders band.Yawancin tambari sau da yawa ana zubar da su.Akwai hanyoyi guda biyu na rigakafinta.Hanya mai girma da aka riga aka gyara, wurin da aka gyara karfen da aka rigaya bayan wani lokaci zai haifar da Luders band, don haka an sanya tambarin karfe da aka rigaya kafin lokaci ba dadewa ba.Ana ƙara wani ƙarfe, aluminum ko titanium zuwa samuwar wani barga mai ƙarfi tare da nitrogen don hana samuwar yawan iska wanda ya haifar da nakasar Coriolis na tsufa.