为了保证我国首例自己制作安装的８００ＭＰａ级水电站厚壁压力钢管的焊接质量，对工程中急待解决的许多焊接、加工等方面的问题进行了试验研究。指出了该钢种良好的抗冷裂性能，给出了防止冷裂的焊前预热温度和适当的焊接线能量范围，列举了抗层状撕裂性能、卷板成型适应性、气割适应性、焊接工艺性等的试验研究结果，并在模型管上进行了验证。 In order to ensure the welding quality of the thick-walled steel penstocks produced by China’s first 800 MW hydropower station, the problems of many welding and processing problems which are urgently needed to be solved in the project are studied experimentally. The good cold cracking resistance of the steel is pointed out. The preheating temperature and the welding energy range are given to prevent cold cracking. The properties of anti-delamination, coiling forming adaptability, gas cutting adaptability , Welding process and other test results, and verified in the model tube.