Dissertation > Excellent graduate degree dissertation topics show

Study on High Temperature Properties and Microstructure Simulation of Continuous Casting Slab

Author: WangQiMing
Tutor: ChenDengFu
School: Chongqing University
Course: Metal Material Engineering
Keywords: Billet High temperature Mechanical Properties Physical properties Tissue simulating
CLC: TF777.1
Type: Master's thesis
Year: 2008
Downloads: 260
Quote: 0
Read: Download Dissertation

Abstract


Continuous casting technology in steel production technology, high temperature performance study billet has a very important significance in guiding production. Billet production, the high temperature properties of the steels is an important indicator of whether the judge slab cracks, is also an important parameter for the numerical simulation of continuous casting process, improve its solidification cooling rate, the development of two cold Dynamic Soft Reduction the relevant parameters of great value. The main task of this paper is the production of slab caster A low-alloy steel and weathering steel B thermophysical properties testing and high-temperature mechanical properties of the test billet steel grades and the resulting physical parameters applied to the slab temperature Field Simulation and organizations in the simulation model, combined with the actual process. Gleeble-1500D thermal simulation machine from 600 ℃ to 1300 ℃ high temperature tensile tests, the parameters of the mechanical properties of the two steels. Section shrinkage rate of the key indicators to identify both steel high-temperature ductility region, low-alloy steel A secondary the brittle zone appears around 725 ~ 900 ℃ secondary brittle zone of weathering steel B is about 775 ~ 950 ℃ to determine the low-alloy steel B of A and weathering steel billet in the secondary cooling zone and straightening point at a temperature as possible to control more than 950 ℃ and 1000 ℃. Using thermal expansion meter DIL402 and Consolidated Thermal Analyzer STA449 thermal expansion performance test and differential thermal analysis test two steel species, to obtain a two steel kinds of different temperatures under the thermal expansion properties, latent heat, the solidus and liquidus lines such heat Acta provide valuable information and based on performance parameters, slab solidification characteristics for the study of the continuous casting process. Use of experimental steel grade physical parameters and the continuous casting slab surface temperature of the test results to determine the appropriate boundary conditions applied to the slab continuous casting secondary cooling computer simulation software, the steel slab caster The cold system were optimized based on actual production results in the optimization, the proof of the physical parameters of the resulting steels have a very important role in the optimization of the secondary cooling system. The test results of the physical parameters and slab surface temperature of the steel grades is also important foundation slab organizations simulation data. In this paper, combining cellular automata (CA) and the finite difference method (FD), random nucleation and growth models of internal equiaxed grains and columnar crystals, cellular automata simulation slab solidification solidification structure, limited difference method to calculate the temperature distribution and solute diffusion. Slab solidification microstructure simulation by the model on three different operating conditions, reproduce the evolution of billet internal organization, random grain nucleation, grain preferential growth of competitive growth and grain random orientation have better reflected. Different technological factors and other competitive growth of equiaxed grains and columnar crystals, simulation results and technology practice and theoretical analysis.

Related Dissertations

  1. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  2. Research on Welding Characteristics of CO2 Laser-GMA Hybrid Welding for Ultra-Low Carbon Bainitic Steel,TG456.7
  3. Microstructure and Mechanical Properties of Mg-Zn-Y-Zr Alloys,TG146.22
  4. Measurement of the Surface Impedance of the High Temperature Superconducting Thin Films with Coplanar Transmission Line,O484.5
  5. The Basic Research of Axial Flux Inductor Type High Temperature Superconducting Motor,TM37
  6. Photosynthetic Apparatus Response to Heat Stress and the Mechanisms in Two Different Cotton with Various Leaf Colours,Q945.11
  7. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  8. Study on the Recycling of Post-Consumer Polyester Textiles,X791
  9. Fabricationand Properties of SiC-AlN Multiphase Ceramics Prepared by Gelcasting,TQ174.62
  10. Synthesis of Polysulfones and Modification for Epoxy Adhesives,TQ433.437
  11. Preliminary Study on Obstacles Effect of Succession Cropping and Reduction Techniques of Microbial Agents in Flue-cured Tobacco,S572
  12. Study on Key Technology Optimization of Flue-cured Tobacco by Bulk Curing,TS44
  13. Construction and Primary Analysis of Differentially Expressed cDNA Library of Alfalfa by Using Suppression Subtractive Hybridization under the High Temperature,S541.9
  14. Study on Agrobacterium-Mediated Transformation of ’Benihonpe’ Strawberry with ALA Synthase Gene,S668.4
  15. Comprehensiv Evaluation of the Tolerance of Sweet Cherry Drafted on Five Different Rootstocks under Drought, Waterlogging and High-Temperature Stress by Subordinate Function Values Analysis,S662.5
  16. Study on Growth and Physiological Metabolism of Tomato Seedlings under High Temperature Stress,S641.2
  17. Study on Effects of Straw Channel-Buried Returning in Rice-Wheat Rotation Field,S141.4
  18. Changes of Cell Ultrastructure and Physiological Indexes and Physical Properties of Tobacco Leaves during Bulk Flue-Curing,S572
  19. Structure and Characterization of Room Temperature Self-crosslinked Acrylonitrile-butadiene-styrene,TQ325.2
  20. Research on Microstructures and Properties of FeMnCrNiAlBSi/Cr3C2 Coatings,TG174.44
  21. Studies of Plasma Spray Metal-Ceramic Compounds Coatings on Q245r Steels,TG174.44

CLC: > Industrial Technology > Metallurgical Industry > Steelmaking > Ingot > Continuous cast steel,near net shape casting > Slab Continuous Casting
© 2012 www.DissertationTopic.Net  Mobile