轨道车辆车体用6008合金吸能型材工艺研究

Study on the Technology of 6008 Alloy Energy Absorbing Profile for Rail Vehicle Body

轨道车辆用吸能盒型材要求变形呈均匀折叠的环状、无撕裂现象。现有型材经高速碰撞易撕裂、飞溅,增加了对乘客造成二次伤害的几率;且吸能效果差,难以应用于轨道车辆吸能部件上。本文研究6008合金添加适量的Mn、Cr、V元素,采用铝棒温度510~520℃,模具温度450~480℃,挤压速度1~1.5 m/min,在线风冷的挤压工艺,经280℃×1 h热处理后,可满足型材压缩试验均匀,无撕裂现象的要求。

The energy absorption box profiles used for rail vehicles require deformation to be evenly folded in a circular shape without tearing.The existing profiles are prone to tearing and splashing during high-speed collisions,increasing the probability of secondary in⁃jury to passengers;And the energy absorption effect is poor,making it difficult to apply to the energy absorption components of rail ve⁃hicles.6008 alloy is studied in the paper.Appropriate amount of Mn,Cr,and V elements the addition of to 6008 alloy,the aluminum rod temperature is 510~520℃,the mold temperature is 450~480℃,and the extrusion speed is 1~1.5m/min.The online air-cooled extrusion process,after heat treatment at 280℃×1h,can meet the requirements of uniform compression test of profiles without tear⁃ing phenomenon.