SPCC钢滑动摩擦与拉伸声发射信号比较分析

为了将声发射技术应用在金属塑性加工中的摩擦监测中,以SPCC钢在拉伸过程与相对运动速度为100mm/min、正压力为7.5kg的摩擦过程产生的声发射信号特征为研究对象,分别用数据统计、平均值等方法对比分析了两种声发射信号的能量、振铃计数、幅度等参数。实验结果表明:SPCC钢拉伸的声发射能量值要远小于摩擦声发射能量值;拉伸的声发射振铃计数分布范围要略大于摩擦声发射振铃计数分布范围;拉伸的声发射幅度要小于摩擦声发射的幅度。最后对出现该现象的原因进行了探讨。

Comparative analysis of acoustic emission signals in sliding friction and tensile of SPCC steel

In order to detecting the frictions of metal plastic deform by use of the acoustic emission technique, this paper studied the character of the acoustic emission produced in tensile test and sliding friction, the relative movement speed is 100mm/min, the stress is 7.5kg, of the steel SPCC. The energy, the ring count, amplitude and other parameters of these two kinds acoustic emission signal were analyzed by using the statistics of data, the average of methods. The experimental results show that, firstly, the value of AE energy in tensile was larger than the energy of AE in sliding friction; secondly, the ring count of AE in tensile test was larger than the ring count of AE in sliding friction; last, the range of the amplitude of AE in tensile test was lower than the amplitude of AE in sliding friction and from 40 to 75 dB. Finally, the reasons was discussed for which this situation.