The results showed that the metallurgical defects such as inclusions,coarse crystal grains and asymmetry of the grain size were the main reason resulting in fracture of the steel rods during drawing.

• 结果表明,原材料中存在的夹杂物、晶粒粗大及混晶等冶金质量缺陷是盘条在拉拔过程中发生断裂的主要原因。