摘要
两件 12.9级气缸盖螺栓发生延迟性断裂，根据螺栓的失效形式，结合螺栓的生产及装配工艺，分析了导致螺栓发生延迟断裂的影响因素，探讨了材料方框偏析对高强度螺栓可能产生的影响，提出了防止高强度螺栓发生延迟断裂的措施。
Delayed fracture of two class 12.9 bolts in cylinder head are found.The factors led to delayed failure are analyzed by combined the manufacturing and assembly processes.The possible effect of the frame－like segregation on the properties of high strength bolts is discussed and some measures to prevent the bolts from delayed fracture are presented.
出处
《汽车科技》
2001年第4期16-18,共3页
Auto Sci-Tech
关键词
高强度螺栓
延迟断裂
装配
方框偏析
汽车
发动机
缸盖螺栓
High strength bolt Delayed fracture Inter－granular crack Assembly Frame－like segregation
