圆柱螺旋弹簧氢脆断裂失效分析

对圆柱螺旋弹簧的断裂行为进行研究,结果表明:制造工艺引入到弹簧中的拉应力以及酸洗工艺渗入弹簧表层的氢原子是导致弹簧发生延迟断裂的主要原因,其断裂方式是一种典型的氢脆断裂。在制造工艺上控制弹簧表层的拉应力水平以及控制或避免环境中氢原子的扩散渗入,把镀锌前除氢改为镀锌后除氢,能有效地避免氢脆断裂的发生。

Hydrogen Brittle Fracture Failure Analysis of Column Spiral Spring

To research the fracture behavior of column spiral spring.The result indicates that the tensile stress brought in spring by manufacture process and the hydrogen atoms filtered surface layer by pickling are main causes for delay fracture of spring,which is a kind of typical hydrogen brittle fracture.It can avoid hydrogen brittle fracture taking place effectively to control tensile stress level of spring surface layer in manufacture process,to control or avoid hydrogen atoms in circumstance to diffuse and filter,and to change galvanizing after hydrogen removing into hydrogen removing after galvanizing.