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CBN tools are highly suited for the dry machining of cast iron at high cutting speeds.

jillian-camacho
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  1. CBN tools are highly suited for the dry machining of cast iron at high cutting speeds • EXPLANATION: Cast iron can be cut dry in turning and milling operations. The dry machining of cast iron has been attempted using ceramic cutting materials and CBN at high surface speeds and feed rates. It’s been found that since CBN tools have the highest thermal conductivity compared with the ceramic type of tools, CBN is able to remove the heat efficiently from the cutting material. Cast iron can also be dry milled with the cermet type of tools at high speeds. Here the high speed employed is not to reduce the machining time, but to reduce the tool and workpiece contact time to prevent the heat of the chip penetrating the tool. • CLASSIFICATION: • Topic: COOLANT AND LUBRICANT • Machine Structure: TOOL • Life Cycle phase: USAGE • Type of machine tools: GENERAL • Material selection: - • KEYWORDS: cast iron, dry machining, MQL (Minimum Quantity Lubrication) • SOURCES: Sreejith, P.S., Ngoi, B.K.A. “Dry machining: Machining of the future”, Journal of Materials Processing Technology 101, 2000 • LINKS: • FIGURES/GRAPHS: 062

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