65钢在拉拔过程中出现不同类型的杯锥状断裂。通过对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，且裂口两端组织变形程度不同。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 that 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 inclusions, residual shrinkage in the centre of wire rod and unsuitable for drawing process.
参考文献
| [1] | |
| [2] | 国家机械出版工业委员会.金属学与热处理.北京：机械出版工业.1988[ 2 ] 张春燕.65钢丝拉拔断裂分析与盘条生产工艺改进[ J ]. 金属制品2009，35（4）：46-51 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%