| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass lubricant for hot extrusion with which glass remaining in the material to be worked after hot extrusion and glass stuck to the inside of a container can be efficiently removed. SOLUTION: (1) Disclosed is a glass lubricant for hot extrusion having a linear expansion coefficient of 80×10<SP>-7</SP>(cm/cm/°C) or below. (2) Disclosed is a glass lubricant for hot extrusion used as a front lubricant and/or an inside lubricant and having a linear expansion coefficient of 80×10<SP>-7</SP>(cm/cm/°C) or below, and whose viscosity at 1,000 to 1,250°C is 10<SP>2.5</SP>to 10<SP>4</SP>poise. (3) Disclosed is a glass lubricant for hot extrusion used as a front lubricant and having a linear expansion coefficient of 80×10<SP>-7</SP>(cm/cm/°C) or below, and whose viscosity at 1,000 to 1,250°C is 10<SP>0</SP>to 10<SP>2.5</SP>poise. (4) Disclosed are a hot extrusion method for a metallic material using the lubricant, and a production method suitably applied to a metal tube, particularly, to a seamless tube. COPYRIGHT: (C)2009,JPO&INPIT |
