65钢住拉拔过程中出现不同类型的杯锥状断裂。通过埘不同形貌的杯锥状断口进行金相检验、显微硬度和能谱分析，结果表明，其断裂原因不同，盘条芯部存在异常组织、非金属夹杂物、孔洞及“V”形裂口，且裂口两端绀织变形程度不同。造成65钢钢丝拉拔呈杯锥状断裂的原因有盘条成分偏析、非金属夹杂物聚集、残余缩孔和拉拔工艺。
Different types of cup-cone fracture occurred during drawing of 65 Steel. Different morphologies of cup- cone fracture were analyzed by SEM, macro-fracture and metallographic, the results show ＊hat different types of cup-cone fractures are caused by different reasons. In the centre region there are abnormal structure, non-metallic inclusions, holes and ＂V＂ shaped gap, what is more, deformation degree at both ends of the gap is different. The reasons causing cup-cone fracture of 65 steel wire in drawing were segregation of components, aggregation of inclu- sions, residual shrinkage in the centre of wire rod and unsuitable for drawing process.
参考文献
| [1] | 马志军,张全刚,赵贤平.65钢盘条拉拔断裂原因分析[J].金属制品,2004(04):37-38,53. |
| [2] | 马怀宪.金属塑性加工学--挤压、拉拔与管材冷轧[M].北京:冶金工业出版社,1991 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%