Based On BP Neural Network About Process Study Of 304 Stainless Steel Hot Deformation

Nuclear power is stability, long life, low pollution, that sustainable development are an important energy source. Forgings are widely used in nuclear power, nuclear power are the major equipment used as a necessary and important basic components, and its basic equipment, particularly heavy forgings of stainless steel are the key to the level of its manufacturing capacity and related equipment directly determines the ability and level of manufacturing. Nuclear power development based on the needs of the community, large stainless steel forgings forging process is very important, the establishment of large forgings forging model, the use of BP neural network optimization are an effective way to optimize both the purpose of forging process of stainless steel, but also study the cost savings and can improve research efficiency, this paper based on BP neural network 304 for processing stainless steel hot forging process optimization study.Based on the hot deformation of 304 stainless steel forging process analysis, the use of simulation and theoretical analysis of the mechanism, set up model and BP neural network combining methods, the process of dynamic deformation, static recrystallization, dynamic, static recovery and post-forging Forging the organization, the relationship between grain size for research. Determine the heavy forgings of 304 stainless steel hot processing (forging) the deformation temperature, strain rate, deformation, stress state changes in the organizational structure and re-crystallization of the grain changes the law, and, respectively, set up a 304 stainless steel forging processing, recovery and recrystallization model, 304 hot deformation of stainless steel forging processing recrystallization grain growth size model. Finally the use of BP neural network of 304 stainless steel forging process are optimized to more accurate prediction of 304 stainless steel in hot deformation under the conditions of recrystallization grain size. This can not only significantly reduce the flow behavior Characterization of Materials required for testing, but also avoid the experience of the constitutive model constants in a number of questions it is difficult to determine. In this paper, 304 stainless steel forging process has a very important guiding role.This topic is aimed at large forgings of 304 stainless steel in hot deformation under the conditions of grain size variation studies to explore the large stainless steel forgings forging process of the evolution of grain size mechanism. Results of research for nuclear power austenitic stainless steel forgings production of large plastic processing quality forecasting and control technology to provide a reliable scientific basis; the study for the solution of practical production of hot forging cracking, coarse grains and uneven, lengthy process, etc. difficult technical issues have important theoretical value; improve China's nuclear power equipment for large forgings manufacturing technology level, the promotion of nuclear power to create their own pieces of foundation has an extremely important scientific significance and practical value.