摘要
一种新型高强度沉淀硬化不锈钢?1.0 mm弹簧钢丝制成的成品弹簧,在室温振动疲劳试验过程中发生了早期断裂。通过断口观察、微观组织分析等试验,揭示了弹簧发生早期开裂原因。弹簧丝直径较小,丝材中夹杂物的体积和分布对丝材横向结合力产生较大影响,使开裂倾向增大。力学分析表明,螺旋弹簧在压应力作用下,弹簧内表面所受的应力水平较高。在对弹簧施加交变压应力时,弹簧在内表面发生了开裂,裂纹逐渐扩展直至弹簧断裂。
A new type high strength precipitation hardening stainless steel?1.0 mm wire was made into springs,which broke early in the vibration fatigue test at room temperature.The cause of early cracking of spring was revealed by fracture observation and microstructure analysis.The diameter of spring wire was small,and the volume and distribution of inclusions in wire had a great influence on the transverse bonding force of wire,which increased the cracking tendency.The mechanical analysis showed that the stress level on the inner surface of the coil spring was high under the action of compressive stress.When the alternating pressure stress was applied to the spring,the inner surface of the spring cracked,and the cracks gradually expanded until the spring break.
作者
卢福康
徐晓卫
孙永庆
郭燕飞
王长军
刘振宝
LU Fukang;XU Xiaowei;SUN Yongqing;GUO Yanfei;WANG Changjun;LIU Zhenbao(AVIC Jincheng Nanjing Engineering Institute of Aircraft System,Nanjing 211106,Jiangsu,China;CASC Shanghai Xinli Power Equipment Research Institute,Shanghai 201108,China;Special Steel Institute,Central Iron and Steel Research Institute Co.,Beijing 100081,China;SINOSTEEL Zhengzhou Research Institute of Steel Wire Products,Zhengzhou 450001,Henan,China)
出处
《金属功能材料》
CAS
2022年第3期36-40,共5页
Metallic Functional Materials
关键词
高强度不锈钢
弹簧
疲劳断裂
高周疲劳
high strength stainless steel
spring
fatigue fracture
high cycle fatigue
