Front side keyhole detection in plasma arc welding of stainless steel  

作　　者：董春林 吴林 张慧 朱轶峰 邵亦陈 

出　　处：《China Welding》1999年第2期24-32,共9页中国焊接（英文版）

摘　　要：The establishment and maintenance of a stable keyhole during plasma arc welding process is of critical importance. Spectroscopic study on the relationship between the keyhole and arc light radiation intensity is pursued in plasma arc welding of stainless steel. It is found that there are salient changes similar to negative pulse in arc light radiant intensity signal with the characteristic changes of the keyhole. In addition, the above signal, which is of particular advantage for estimating the keyhole formation or closure, can be improved by means of detecting sensitive spectral line intensity.The establishment and maintenance of a stable keyhole during plasma arc welding process is of critical importance. Spectroscopic study on the relationship between the keyhole and arc light radiation intensity is pursued in plasma arc welding of stainless steel. It is found that there are salient changes similar to negative pulse in arc light radiant intensity signal with the characteristic changes of the keyhole. In addition, the above signal, which is of particular advantage for estimating the keyhole formation or closure, can be improved by means of detecting sensitive spectral line intensity.

关 键 词：PAW KEYHOLE SPECTRA 

分 类 号：TG457.11[金属学及工艺—焊接]