摘要
通过断口分析、化学成分分析、金相检验和硬度测试对皮卡车的钢板弹簧断裂的原因进行了分析。结果表明:钢板弹簧表面存在凹坑造成了应力集中,而且板材的非金属夹杂物超标,降低了疲劳强度,在交变应力载荷的作用下,最终造成钢板弹簧发生了早期疲劳断裂。
The fracture reason of leaf spring of pickup vehicle was analyzed by means of fracture analysis, chemical composition analysis, metallographic examination and hardness testing. The results showed that the surface pits caused the local stress concentration, and the nonmetal inclusions in material led to reduce the fatigue strength. Under the alternating stress load, the early fatigue fracture occurred in the leaf spring at last.
出处
《理化检验（物理分册）》
CAS
2011年第5期321-322,326,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
板弹簧
疲劳断裂
非金属夹杂物
leaf spring
fatigue fracture
nonmetal inclusion
