Quantitative Assessment of the Influence of Calcium Additions on Tool Wear in 8620 Steel

<div class="htmlview paragraph">The effect of calcium additions on the tool wear behavior of a series of SAE 8620 bar steels has been investigated. Of particular interest in this study was the influence of Ca additions on: (<span class="xref">1</span>) the stereological parameters of the non-metallic inclusions, and (<span class="xref">2</span>) the quantitative evaluation of the machinability behavior (B-index) of the steels using the Volvo tool wear test. The results of this investigation have revealed a linear relationship between the machinability of the workpiece (B-index) and certain non-metallic inclusion stereological parameters (ISP).</div>