摘要
分析了超声工具头失效的原因。用超声疲劳试验技术研究了 4 0 Cr Ni Mo A钢不同微观组织在 2 0 k Hz时的疲劳寿命。结果显示表面处理能显著提高工件的超声疲劳寿命 ,并且在中等应力状态下 ,具有强韧配合的微观组织超声疲劳寿命最高。试样在超过 10 7周应力循环后继续发生破坏。
The cause of a ultrasonic probe failure was analyzed and the fatigue life of probes made from 40CrNiMoA steel with different microstructure was studied by the ultrasonic fatigue technique at 20 kHz. The results showed that the ultrasonic fatigue life of a part could be markedly increased by surface treatment. The ultrasonic fatigue life of a probe with microstructure of combined strength and toughness was the longest under a medium stress condition and a specimen would be continued to fail over 107 stress cycles.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2004年第6期185-188,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
江苏省教育厅自然科学基金项目 (项目编号 :0 3 KJB43 0 0 2 6)
