高强度钢手工焊接后过程的声发射实时监测研究

本针对实际工艺中使用的高强度钢，重点对手工焊接的冷却过程利用声发射技术进行实时监测。本次试验是和先前在不同型号的钢板在手工焊接过程中所产生的声发射信号进行比较的基础上进行的，主要目的是寻找高强度钢在手工焊接的冷却中所产生的活性裂纹在冷却阶段的声信号特征。

Study on monitoring cracks produced in manual welding of high-strength steel by acoustic emission in the post-process

This paper is engaged in research about monitoring cracks produced during manual welding of high-strength steel by AE(acoustic emission) method. The research is based on the previous study on monitoring cracks produced in manual welding of different type steels by AE method. In order to find out the characters of the AE signals generated in high-strength steel, especially the cooling period of the manual welding was monitored by AE method. The analysis of the test data shows that it is possible to use the AE method to monitor the cooling period of high-strength steer. The place where continuous signals are located by the AE system should be rechecked by conventional non-destructive methods.