RELATION BETWEEN DISCONTINUOUS PLASTIC FLOW AND STRAIN HARDENING OF THE LOW-CARBON STEEL

Purpose. Determination of the conditions for disappearance a section intermittent flow and its effect on strain hardening low-carbon steel.
 Actuality. The use low carbon steels with stamping has significant limitation. Based this, issues ferrite grain size occurrence are relevant determining optimal structural state intended deep drawing.
 Research methods. structure samples was studied under light microscope, determined by methods quantitative metallography. mechanical properties steel were in tension at room temperature rate 10-3 s-1. characteristics initiation plastic parameters from analysis curves logarithmic coordinates. In region uniform hardening, deformation violation directly proportional relation lgσ-lgε as moment formation dislocation structures certain periodicity.
 Results. An increase is accompanied decrease shift cellular towards small deformations. work Lüders related an inversely relationship. With excessively large sizes ferrite, difficulty maintaining distribution slip lines one reasons Scientific novelty. beginning decay dislocations into periodic shifted to decrease. At same time, ability metal during band contributes length section.
 Practical value. Determining nature influence can be useful drawing.