COVERED CARBIDE PLUG AND COLD DRAWING METHOD USING THE COVERED CARBIDE PLUG

摘要

When the jurisdiction of the Cr-based alloy steel containing Cr at least 5% by weight cold-drawing process, employing a tube blank formed film oxalate in not the lubricating coating by the chemical conversion treatment, and aluminum (TiAlN) as a plug for the pull-out the surface of titanium nitride by using a film-coated cemented carbide coated with a plug, a TiAlN film peeling is suppressed by being coated on the surface of the plug, it is possible to prevent the occurrence of the burn-wound, it is possible to promote the extension of the plug lifetime. ;