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某些文献〔1、2等〕曾经确定,借助挤压筒和金属之间产生有效作用(朝金属流动方向)的摩擦力,挤压时的变形状态可大大得到改善。本文叙述了直径29.5,长60毫米的 AB、AMr6,16和B96合金试样进行有效热挤压的研究结果。该研究是在液压机械设备上使挤压筒朝金属流动方向用一定的速度对挤压毛坯作强制运动的方法进行的。在这种情况下特别注意了各种不同温度一速度条件下的变形状态。据报导〔3,4〕,促使毛坯的变形区内产生两个邻接区域条件的那种应力状态,对于形成脆性破断裂纹来说,是最危险的。在这两个区域内当(挤压筒的摩擦应力和塑
Some papers [1, 2, etc.] have determined that by virtue of the frictional force acting between the cylinder and the metal (in the direction of flow of the metal), the deformation state upon extrusion can be greatly improved. This paper describes the results of an effective hot extrusion of AB, AMr6, 16 and B96 alloy samples 29.5 in. Diameter and 60 mm in length. This study was carried out on a hydraulic machinery and equipment by means of a forced movement of the extruded blank at a certain speed in the direction of metal flow. In this case special attention to a variety of temperature and speed conditions of the deformation state. It has been reported [3, 4] that the most stressful condition that leads to the formation of two adjacent zone conditions in the deformation zone of the blank is the most dangerous for the formation of brittle fracture. In both areas when (squeeze the barrel frictional stress and plastic