This paper deals with the process methods to eliminating theextruded crazes by increasing the punch diameter and hole surface finish.The plans for extruding the deeper hole articles are feasible.

• 研究了消除深孔薄壁挤压零件产生裂纹的措施，提出了用增大芯轴对孔的过盈量来提高金属塑性及内孔壁光洁度的方法，消除了裂纹的产生，制造出了使用性能较好的零件。