Forming and manufacturing technology of large cylinder forgings

Forming and manufacturing technology of large cylinder forgings
Core tips: The world is studying large barrel forgings forming manufacturing technology, of course, our country is also studying, mainly to share some related large barrel forgings forming manufacturing technology
All the countries in the world are studying large barrel forging manufacturing technology, and of course our country is also studying, mainly to share some knowledge of large barrel forging manufacturing technology.
The production of large ingot cylinder forgings in China can meet the demand of large outside diameter. In the 1980s, hollow ingot was used to produce large hydrogenation reactor cylinder forgings.
Product quality basic pass, about 5,7 production of this kind of products every year, Kawasaki iron research and development of the "in external forging method", can be in its 4400 t hydraulic press to produce the outer diameter of 71 5 m large ring and cylinder forging but never hollow ingot large nuclear torch body forging production; Two pieces, dimensional accuracy up to 5mm. In the 1990s, the Japanese heavy industry Group has already started the preresearch of hollow ingot forging technology, and some theoretical results have been obtained. The improved boiling-water clean reactor pressure vessel with inner diameter of 711m and Galant with outer diameter of 814m were also produced by a similar process at Soshirolan Steel Mill.
Large barrel forgings press weight mesoscopy, the world's major barrel forgings of the production of water reactor pressure vessels and other representative products. In 2005, in the process of forging large-scale cylinder forgings, more and more groups have used the temporary removal of hydraulic press column protection, so that the open size is based on the influence of grain structure on the final product performance, and the method of gradually increasing to 511 m, successfully produced size specifications for process measures to refine grain organization and uniform grain distribution. Among them, the 1900mmx5030mm forgings of pressure vessel cylinder broke the research method combining physical simulation and numerical simulation and drove the size limit of 5m of large cylinder 1.12 million tons hydraulic press. In April 2006, the forging technology level of integrated forgings improved rapidly. In 1987, KoppR with a total weight of 312t was firstly divided into three layers of SA508cl1 and 3 steel ingot for forging a 650M W nuclear reactor. The first layer is the macroscopic analysis of force, energy, work and other parameters. Local analysis of the distribution law of two-level stress, strain and other parameters in the barrel body and nozzle section of the second vessel.