随着化工行业的日益发展和基于安全因素的考虑,低温钢管越来越被广泛地运用。但低温钢的焊接比普通碳钢管难度要大,因其铁水流动性很差,所以焊接时极易出现背面凹陷问题(无论是平焊、立焊还是仰焊都容易发生),给实际操作带来了极大的困难。通过反复实验和工作中的实际运用,我们总结出了一种行之有效的操作方法,成功地解决了这一问题。 With the development of the chemical industry and the consideration of safety factors, low temperature steel pipes are widely used. However, the welding of low temperature steel is more difficult than that of ordinary carbon steel pipe. Because of its poor hot metal flowability, the problem of backside depression easily occurs during welding (whether flat welding, vertical welding or suction welding are easy to occur) Great difficulty came. Through repeated experiments and practical applications, we have concluded an effective method of operation and successfully solved this problem.