Hot-birgima sumul karfe bututu daga tube zuwa samfurin kullum na bukatar biyu dumama, wanda perforated tube kafin da kuma bayan dumama da kuma mirgina blank bututu diamita a ba pre-dumama; samar da sanyi-birgima (jawo) lokacin da bututu ya buƙaci yin amfani da tsaka-tsaki na tsakiya don kawar da ragowar damuwa; karfe don wasu buƙatu na musamman, don haɓaka kayan aikin injiniya na bututun ƙarfe da haɓaka ƙungiyoyi da ayyukan aiwatarwa, amma har da maganin zafi. Common tube (bututu) dumama tube lahani m dumama, hadawan abu da iskar shaka, decarbonization, dumama fasa, overheating, kan-kona.

Mai zafi gaban perforated tube, da kuma manufar shi ne don inganta ductility; rage nakasar juriya karfe; samar da kyau microstructure yana mirgina. Akwai tanderun bututun wutar lantarki, tanderu mai sake dumama, murhun murhun wuta da murhun ƙasan mota. Ganin ƙarancin bututu diamita kafin reheating, wanda ke nufin ƙara yawan zafin jiki na bututu da ƙarancin uniform da inganta ductility na karfe, sarrafa microstructure, haifar da yanayi mai kyau don girman girman uwar bututu da tabbatar da kaddarorin inji na karfe. Nau'in na yau da kullun na sake dumama tanderun tanderu, ci gaba da abin nadi na murhu mai mai da wutar makera, tanderun murhun wutan wuta, tanderun mai sake dumama. Cold-birgima (ja) reheating hardening yafi don kawar, rage nakasawa juriya. An fi amfani da murhun murɗawa na gama-gari a cikin tanderu mai dumama, murhun ƙasan mota, ci gaba da tanderun murhu. A cikin samar da bututun ƙarfe maras kyau, tanderun annular da tanderun da aka sake yin zafi a halin yanzu an fi amfani da su; Ana kuma samar da tanderun shigar da wutar lantarki; Murfin dumama murhu saboda ingancin ba shi da girma, aiki mai ƙarfi kuma ana iya kawar da shi. Ci gaba da abin nadi murhu makera ne yafi amfani a cikin sanyi-birgima (ja) da zafi magani na karfe; Motar kasa tanderu dace da karami batches, zafi magani lokaci ne ya fi tsayi dumama da rufi lokacin farin ciki-banga gami karfe bututu; m gas ci gaba da abin nadi hearth makera ne yafi amfani a karfe surface bukatar zafi magani da sanyi ƙãre karfe ba tare da hadawan abu da iskar shaka (ja) a lokacin pickling tsari annealing.