挤压重金属时,未经冷却的穿孔针所产生的高热已超过允许范围,往往要对穿孔针进行冷却处理,这是必要的.可是,挤压铝合金管材时,却不冷却穿孔针,认为这是余多的.然而,用冷的穿孔针挤压铝管时,能使剪切热量和变形热量从铸锭上传导出来,同时也就提高了挤压速度.这点,对挤压难变形合金有一定的意义.本文将围绕这一主题进行的试验结果报告如下,并就此还进行了讨论. It is necessary to squeeze the heavy metal, the high heat generated by the uncooled perforated needle has exceeded the allowable range, it is necessary to cooling the perforated needle.However, extrusion of aluminum alloy pipe, but not cooling perforation needle, that However, the extrusion of aluminum tubes with cold perforated needles leads to shear heat and deformation heat transfer from the ingot, and at the same time increases the extrusion speed. Deformation of the alloy has some significance.This paper will focus on the theme of the test results reported below, and this is also discussed.