Abstract
Recently, interest in global environment has been increasing. Demands for improved structural components and lightweight parts are increasing. It is further necessary to increase the strength of high-carbon steel wires. Delamination is a critical problem of high-strength steel wire. A major factor in the delamination is strain aging by the heat generated during wire drawing. Therefore, cryogenic drawing is effective for avoiding strain aging. In this study, the heat generated during wire drawing is focused on, and the drawing force in cryogenic drawing with various types of lubricants, i.e., liquid or powder lubricants, is discussed. Cryogenic drawing was realized by holding the wire in a box filled with liquid nitrogen prior to drawing, and the drawing force was measured using a load cell. An appropriate lubricant in cryogenic drawing was found to be powder lubricant.
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