根据几年来的生产实践,我们感到粗丝脉冲窄间隙焊接方法还有一些工艺问题尚待进一步完善解决,主要是:1.需进一步提高间隙侧壁熔合的可靠性。2.由于富氩保护脉冲焊接的电弧“指状”熔深特性(在窄间隙焊接中尤为突出),使焊缝抗裂性能降低,且易产生层间熔合不 According to several years of production practice, we feel that there are still some technical problems in the narrow-gap welding method of thick wire pulser. Some of these problems are still to be solved. The main ones are: 1. The reliability of fissure sidewall fusing should be further improved. 2. Due to arc “finger” penetration characteristics of argon-rich protection pulse welding (especially in narrow gap welding), the anti-cracking performance of the weld joint is reduced and interlayer fusion is not easy