Dissertation > Excellent graduate degree dissertation topics show

Computer Simulation of Temperature Field and Phase Transformation in Heat Treatment for Heavy Rail End

Author: ZhangMin
Tutor: ZhaoGang
School: Wuhan University of Science and Technology
Course: Materials Processing Engineering
Keywords: The end of the heavy rail Quench Finite Element Numerical Simulation Temperature field Organization into
CLC: TG156.3
Type: Master's thesis
Year: 2010
Downloads: 86
Quote: 0
Read: Download Dissertation

Abstract


Before the official opening of the Wuhan-Guangzhou high-speed rail operators , marking the Chinese railway operators speed has reached the fastest in the world , railway Technical largest in the world . Although our research has made some achievements , but to continue to meet the rapid development of our economy , and on the requirements of China 's railway technology innovation along with constantly . The end of the heat treatment of heavy rail occupies a very important position in the entire production process of the heavy rail , it relates to a heat transfer metal phase transformation kinetics and other disciplines . The immediate purpose of the heat treatment of the heavy rail is to improve the organization of the rolling the rear end portion , to improve the strength and toughness of the heavy rail , while preventing the internal formation of white spots , reduce its internal stress and improve the surface hardness of the rail head , and increased wear resistance . In this paper, the finite element method , and computer simulation analysis of the heat treatment process of the heavy rail ends . Steels in thermal simulation machine U71Mn continuous cooling transformation test , plotted U71Mn steel continuous transformation curve , and organizations under the different cooling rates were analyzed by metallographic experiments . Establish the finite element model of the heavy rail ends heat treatment process thermal physical parameters U71Mn steel , using the model to calculate heavy rail transient temperature field and organizational changes , and the use of computer graphics theory , combined with heavy rail end cap the master organizational changes in the the shaped sample thermal simulation experiments feature, in post- processing module of the finite element software DEFORM-HT to explore the the heavy rail quenching process change and organizational changes of the temperature field of law . The eventual establishment of a New Heat Treatment Process heavy rail end cap -shaped computer simulation system , and provide a theoretical basis for the actual production process . The effect of using the simulation system to explain the rounded corners of the rail head , organizational simulation results show that the the quenching the rear end of cross-sectional organization for smaller -like pearlite ( soxhlet the body troostite ) martensite , bainite organization. Organizations simulation results with the experimental results and the Ministry of Railways standard , received very good results , so as to verify the reliability of the simulation system .

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  3. Study on Springback of High-Strength Steel Stamping,TG386
  4. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  5. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  6. EDM Electrode Wear Mechanism and Control Research,TG661
  7. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  8. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  9. Study on Contact Fatigue Life Based on Grease Variation with Temperature,TH117.22
  10. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  11. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  12. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  13. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  14. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  15. Simplified Analysis of Semi-Rigid Steel Frames under Vertical Loading,TU391
  16. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  17. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  18. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  19. Numerical Simulation of Biomass Direct Reburning,TK16
  20. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  21. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Heat treatment > Heat treatment process > Hardening, surface hardening
© 2012 www.DissertationTopic.Net  Mobile