摘要
采用微观扫描及金相检验等方法对受电弓拉杆断裂的原因进行了分析。结果表明,受电弓拉杆断裂是由于承受着拉应力和焊接残余应力,导致拉杆过早的产生疲劳和应力腐蚀断裂。
The reason for fracture of pantograph rod was analyzed by SEM and metallographic testing.The results showed that the fracture of pantograph rod was due to under tensile stress and welding residual stress,which led to premature rod fatigue and stress corrosion cracking.
出处
《热处理技术与装备》
2014年第5期30-33,共4页
Heat Treatment Technology and Equipment
关键词
受电弓拉杆
残余应力
应力腐蚀
pantograph rod
residual stress
stress corrosion
