摘要
对54Si Cr6卷簧后做疲劳性能检测时发现弹簧未达标准便疲劳断裂,对疲劳断裂弹簧和缠簧原料进行综合分析,结果表明:弹簧疲劳失效的主要原因是原料表面存在严重不均匀脱碳,且混晶加速了54Si Cr6弹簧疲劳失效。在生产过程中应严格控制钢坯加热和退火温度及其均匀性,杜绝光亮材表面存在脱碳;为防止混晶,应杜绝采用小减面率拉拔+磨光工艺生产,恢复剥皮生产工艺,杜绝钢坯高温、长时间加热,合理控制终轧温度。
The 54 Si Cr6 spring had not reach the standard but broke. The cracked spring and spring material were analyzed. The results show that the main reasons for spring fatigue failed are serious uneven decarburization on the surface of the raw material and mixed crystal. So in future,heating temperature,annealing temperature and uniformity of the billet should be controlled strictly to prevent decarburization on the light material surface. Preclude the small ratio of surface drawing+polishing process,restore skin production process,control heat temperature and finishing rolling temperature to prevent mixed crystal.
出处
《物理测试》
CAS
2015年第5期48-50,共3页
Physics Examination and Testing
关键词
弹簧
疲劳断裂
脱碳
混晶
回火
spring
fatigue fracture
decarburization
mixed crystal
tempering
