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The Effect of Si Content on Important Properties of A Mo and V Free Low Alloy Cast Steel for The Insert of Cold Pressing Die  

Shin, Je-Sik (Liquid Processing & Casting Technology R/D Department, Production Technology R/D Division, Korea Institute of Industrial Technology)
Kim, Bong-Whan (Liquid Processing & Casting Technology R/D Department, Production Technology R/D Division, Korea Institute of Industrial Technology)
Moon, Byung-Moon (Liquid Processing & Casting Technology R/D Department, Production Technology R/D Division, Korea Institute of Industrial Technology)
Publication Information
Journal of Korea Foundry Society / v.29, no.2, 2009 , pp. 70-77 More about this Journal
Abstract
The aim of this study was to develop a Mo and V free low alloy cast steel materials, enabling the significant cost- and time-savings in manufacturing and maintaining the insert of cold pressing die without impairment of the important properties. For this purpose, the effects of Si content on combinations of important properties such as hardness, hardenability, and weldability, and strength were systematically investigated. In order to evaluate the applicability as the insert of cold pressing die, the mechanical properties were measured after spheroidization annealing, quenching and tempering, and flame hardening heat treatments, respectively. After the Q/T and F.H. treatments, the developed 0.8${\sim}$1.6%Si containing Mo and V free low alloy cast steels showed excellent matrix strengthening effect, hardenability, and weldability, fulfilling the industrial criterion of the mechanical properties for automobile cold pressing die insert.
Keywords
Low alloy cast steel; Cold pressing die; Die insert; Matrix hardening; Flame hardening; Weldability.;
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