Ca快削鋼中の酸化物系介在物融点と切削温度の関係について

概要

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Melting various kinds of calcium bearing free-machining steel whose oxide inclusions are different respectively, an investigation was made about the relation between the melting point of oxide inclusion and the cutting temperature that exerts P10 grade cemented carbide tool life.1. The composition of oxide inclusion is affected by deoxidizer such as CaSi, Al, FeSi etc. and it gives influence to the melting point of oxide inclusion.2. The tool life will be improved if the ratio between the melting point of oxide inclusion and the cutting temperature is adjusted to about 1.7. In this case, the “Belag” grows much.3. Comparing HMn-S20C and S45C with S20C the cutting temperature is higher and accordingly the melting point of oxide inclusion is to be raised so as to meet the rising degree of the cutting temperature.
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