随着电力工业的发展,我国已经开始形成了以火力发电机组为主,以加速发展的水力和核电机组为辅,风电、太阳能等可再生能源区域性发展的发电设备总格局。随着机组容量的增大、参数的提高,所使用的钢材和焊接材料品种及规格日趋复杂,工程量加大,焊口数量增多,异种钢焊口增多,管壁厚度增大,安全性的要求也越来越高,促使电站焊接必须提高 With the development of the power industry, China has begun to form a general pattern of power generation equipment with the regional development of renewable energy such as wind power generation, supplemented by the accelerated development of hydraulic and nuclear power units, wind power and solar energy. With the increase of unit capacity, the increase of parameters, the varieties and specifications of steel materials and welding materials used are becoming more and more complicated, the engineering quantity is increased, the number of welding ports is increased, the number of welding joints of dissimilar steel is increased, the thickness of the pipe wall is increased, and the safety The demand is also getting higher and higher, prompting the welding of power plants must be improved