| The procedural factors of the heat treatment of metal materials are very complex,and it is always only to assume the existence of problems in the process by the results of heat treatment,and then to improve them one by one.This method increases the production cost,delays the production cycle,and may cause potential irreversible damage to the metal material,such as quenching deformation and quenching cracks.Since the end of the last century,with the improvement of computer computing and operating capabilities,various heat treatments and thermal processing have been simulated by computer simulations,which greatly advances the research of heat treatment processes.Among them,the most widely used simulation method on the mesoscopic scale is the cellular automaton method.He represents a complex system in a simple and flexible form.05Cr17Ni4Cu4Nb stainless steel is a newly used tapered pin material,with higher strength,capable of carrying higher speeds of the final stage blades.In this thesis,the solution aging treatment of this materials is simulated by CA method.The main contents are as follows:(1)Using the finite difference model,the temperature field distribution of the current equipment is analyzed;(2)Based on the principle of grain growth with temperature,a two-dimensional grain growth cellular automata model with high temperature solution treatment was established.The model considers the two main influencing factors of solution temperature and holding time and determines The optimal solution temperature range of the material;(3)By analyzing the phase diagram of Fe-Cu and combining with the types of solute mainly precipitated,a two-dimensional cellular automata model for the precipitation of precipitates is established.The model also considers two main parameters of aging temperature and time,and analyzes the middle Adjust the impact of the treatment on the material;(4)Measured the simulated results and established the process parameters that are suitable for the existing equipment. |
PDF Full Text Request