前言原子能发电是代替石油的一种新能源。目前,已经起了很重要的作用。但是,由于美国三黑岛发生了一起事故,在社会上的影响极大,所以世界各国对原子能反应堆的设计、制造、运行等都在按照规范标准进行严格的管理,力图确保其安全可靠。对于原子能发电设备所采用的焊接材料,不仅应考虑其性能是否良好,还要求 Foreword Nuclear power generation is a new energy substitute for oil. At present, it has played a very important role. However, as a result of an accident in the three islands of the United States, which has a great social impact, all countries in the world are strictly managing the design, manufacture and operation of nuclear reactors in accordance with the normative standards in an effort to ensure their safety and reliability. For the welding materials used in nuclear power generation equipment, not only should its performance be considered good, but also