This review has identified seven significant practices for minimizing strain hardening as listed below in order of process route: Aim for lower C, Mn and Si; Reduce residual elements Cu, Ni, Cr, Mo, P and N; Use boron or other nitride formers to minimize free nitrogen content; Apply controlled rolling and cooling practices to increase ferrite grain size, reduce volume fraction of pearlite, increase pearlite lamellar spacing, and minimize quench aging due to the super-saturation of carbon and nitrogen; Use tapered drafting with lighter reductions; Apply the Delta Parameter principles to die design; and Minimize temperature and time at temperature during drawing with cooling of blocks and dies, use of lubricant film and appropriate drawing speeds.
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