研究了 Si CW/L D2复合材料管材的热挤压成形工艺。研究结果表明 ,采用传统的热挤压方法得到的 Si CW/L D2复合材料管材外表面具有严重的表面缺陷 ;采用包覆挤压方法 ,可使 Si CW/L D2复合材料管材外表面覆盖一层均匀的铝包覆层 ,消除了表面缺陷 ,证明包覆挤压方法是一种有效的 Si CW/Al复合材料管材的热挤压成形方法 The hot extrusion forming process of Si CW / L D2 composite pipe was studied. The results show that the outer surface of the Si CW / L D2 composite pipe obtained by the traditional hot-extrusion method has serious surface defects. The outer surface of the Si CW / L D2 composite pipe can be covered with a The uniform aluminum coating eliminates surface defects and demonstrates that the extrusion coating method is an effective hot extrusion method for Si CW / Al composite tubing