Zafafan ƙirƙirashine ƙirƙira na ƙarfe sama da zafin jiki na recrystallization.
Ƙara yawan zafin jiki zai iya inganta ƙwayar filastik na karfe, yana da kyau don inganta yanayin aiki na ciki, don haka ba shi da sauƙi a fashe. Babban zafin jiki kuma na iya rage juriyar gurɓacewar ƙarfe, rage adadin da ake buƙata na injunan ƙirƙira. Amma zafi ƙirƙira tsari, workpiece daidaito ne matalauta, da surface ba santsi, forging sauki don samar da hadawan abu da iskar shaka, decarburization da kona hasara. Lokacin da workpiece yana da girma da kauri, ƙarfin kayan yana da girma kuma filastik yana da ƙasa (kamar mirgina ƙarin farantin mai kauri, tsayin zane na babban sandar ƙarfe na carbon, da sauransu).ƙirƙira mai zafiana amfani da shi. Lokacin da karfe (kamar gubar, tin, zinc, jan karfe, aluminum, da dai sauransu) yana da isasshen filastik kuma adadin nakasar ba ta da girma (kamar yadda yake a yawancin sarrafa stamping), ko adadin nakasar da tsarin ƙirƙira da aka yi amfani da shi ( kamar extrusion, radial forging, da dai sauransu) yana da amfani ga nakasar filastik na karfe, sau da yawa ba sa amfani da ƙirƙira mai zafi, amma amfani da ƙirƙira mai sanyi. Matsakaicin zafin jiki tsakanin farkon ƙirƙira zafin jiki daƙirƙira ta ƙarshezafin ƙirƙira mai zafi ya kamata ya zama babba kamar yadda zai yiwu don cimma aikin ƙirƙira gwargwadon yuwuwar dumama ɗaya. Duk da haka, highfara ƙirƙirazafin jiki zai haifar da haɓakar ƙwayar ƙarfe da yawa da kuma samuwar zafi mai yawa, wanda zai rage ingancin sassa masu ƙirƙira. Lokacin da zafin jiki yana kusa da wurin narkewa na ƙarfe, ƙananan kayan narkewar kayan narkewa da oxidation intergranular zai faru, yana haifar da ƙonewa. Ana karye billet ɗin da aka ƙone fiye da kima yayin ƙirƙira. Janarƙirƙira mai zafizafin jiki ne: carbon karfe 800 ~ 1250 ℃; Alloy tsarin karfe 850 ~ 1150 ℃; Babban gudun karfe 900 ~ 1100 ℃; Yawan amfani da aluminum gami 380 ~ 500 ℃; Titanium alloy 850 ~ 1000 ℃; Brass 700 ~ 900 ℃.

Ƙirƙirar sanyiya yi ƙasa da zafin ƙirƙira na ƙarfe na ƙirƙira, yawanci ana kiransa sanyi ƙirƙira a dakin da zafin jiki, kuma zai kasance mafi girma fiye da zafin jiki, amma bai wuce yanayin recrystallization na ƙirƙira ba ana kiransa daɗaɗɗen ƙirƙira. Madaidaicin ƙirƙira mai ɗumi ya fi girma, saman ya fi santsi kuma juriya na lalacewa ba ta da girma.
The workpiece kafa ta sanyi ƙirƙira karkashin al'ada zafin jiki yana da high madaidaici a cikin siffar da girman, m surface, 'yan aiki hanyoyin da sauki sarrafa sarrafa kansa samarwa. Yawancin sassa masu ƙirƙira sanyi da sanyi ana iya amfani da su kai tsaye azaman sassa ko samfuran ba tare da buƙatar yanke ba. Amma aƙirƙira sanyi, saboda ƙananan filastik na ƙarfe, yana da sauƙi don fashewa a lokacin lalacewa, kuma juriya na lalacewa yana da girma, don hakababban ton na ƙirƙirakuma ana buƙatar injin matsi.