前言随着我国水电建设事业的飞跃发展,单机容量日益增大,水力发电机组所需的毛坯也就越来越大。这些大型毛坯如采用整铸,则往往由于受冶铸能力限制,不能满足生产需要,其中尤以大型混流式水轮机转轮最为突出。此项转轮不仅重量大、体积大,而且形状复杂,线形尺寸要求也严格。为此,采用分铸拚焊结构比较合适。 Preface With the rapid development of hydropower construction in China, the single unit capacity is increasing day by day, and the blank parts required by hydroelectric generating units are also getting larger and larger. If these large-scale rough castings are used, they often can not meet the production needs due to the limitation of metallurgical capacity, especially the large Francis turbine runner is the most prominent. The runner is not only heavy, bulky, and complex shape, linear size requirements are also strict. To this end, the use of cast-welded tailor-welded structure is more appropriate.