近年来,世界各国随着船舶容量的不断加大,船舶吨位的不断增加,船用锻件如柴油机曲轴、船轴、舵杆、一推进轴等尺寸也不断加大,为了满足船用大锻件发展的需要,在锻件生产上不仅要满足尺寸重量和数量上的要求,还要不断提高锻件质量。近几年国外的锻件生产主要在以下三方面进行了研究和发展。 In recent years, with the increasing capacity of ships and the increasing tonnage of ships in various countries in the world, the dimensions of marine forgings such as diesel crankshafts, ship shafts, rudder stock, and propulsion shafts have also been continuously enlarged. In order to meet the needs of the development of marine heavy forgings , In forging production not only to meet the size and weight requirements, but also continue to improve the quality of forgings. In recent years, foreign forgings production mainly in the following three aspects of research and development.