摘要
为了能确定某海上设备使用的35CrMnSiA高强度螺栓的断裂原因,对断裂的螺栓进行外观检查,断口宏观、微观分析,氢含量检测,金相组织检查及硬度检测等试验。在理化试验的基础上,运用微观断裂机理对螺栓的断裂原因进行分析,得出结论:其断裂失效性质为由应力,氢和腐蚀共同作用引起的氢致开裂型应力腐蚀断裂。其中,引起螺栓断裂的氢来自外界腐蚀环境。提出改善螺栓的加工工艺和使用无氢脆的涂覆层来提高螺栓的抗腐蚀断裂能力。
In order to definite the failure reason of 35CrMnSiA high-strength bolts used in an ocean equipment, the experiments such as appearance examination, macro-and micro-fractographs analysis, hydrogen content determination, microstructure examination, rigidity testing were carried out. Based on the physics and chemistry experiments, the reasons of the bolt s fracture were analyzed using micro-fracture mechanism. The results show that the character of the bolt s fracture is hydrogen induced cracking stress corro...
出处
《热加工工艺》
CSCD
北大核心
2009年第2期128-130,共3页
Hot Working Technology
基金
江苏省博士后科研资助计划资助项目(0701017C)
关键词
高强度螺栓
失效分析
氢脆
应力腐蚀
微观断裂机理
high strength bolt
failure analysis
hydrogen embrittlement
stress corrosion
micro-fracture mechanism
