Official Answer
Answer
Ƙirƙirar zoben riƙewa mai karkace ya ƙunshi babban nakasar filastik, wanda ke gabatar da babban juzu'i da damuwa mai matsi a cikin ɓangaren giciye. Ba tare da kawar da damuwa ba, waɗannan matsalolin da suka rage na iya haifar da 'spring-back' ko 'creep' (rashin kwanciyar hankali) a kan lokaci. Don SAE 1070 carbon karfe, rage damuwa yawanci ana yin shi a $250^{\circ}C$ zuwa $350^{\circ}C$ akan $30$ zuwa $60$ mintuna. Wannan zafin jiki yana ƙasa da zafin jiki, don haka baya rage taurin tsarin martensitic amma yana ba da damar sake tsara rarrabuwa zuwa yanayin ƙarancin kuzari. Don bakin karfe kamar 302, zafin jiki ya fi girma, kusan $400^{\circ}C$ zuwa $450^{\circ}C$, don tabbatar da kwanciyar hankali a cikin yanayin naɗe.
