Dissertation > Excellent graduate degree dissertation topics show

Study of Properties and Microstructure of Dip Aluminized Layer of Carbon Steel Surfaces

Author: LiuXueMin
Tutor: LiuBing
School: Xinjiang University
Course: Materials Processing Engineering
Keywords: Aluminized layer High-temperature oxidation Wear and tear
CLC: TG174.4
Type: Master's thesis
Year: 2009
Downloads: 202
Quote: 0
Read: Download Dissertation

Abstract


The subject in order to study the carbon steel surface infiltration microstructure and properties of the aluminum alloy layer , quadratic orthogonal regression testing method , Q235 steel hot-dip the infiltration temperature infiltration relationship between the thickness of the aluminum layer and the thermal diffusion time , diffusion temperature and thermal diffusion penetrates the relationship between the thickness of the aluminum layer , the establishment of a mathematical model to determine the ideal process parameters . And optimal process parameters on the surface of Q235 steel Hot Dip aluminum, thermal diffusion aluminized test , using the comparison method to the principle of Hot Dip aluminum and thermal diffusion aluminized , hot infiltration aluminum steel and thermal diffusivity and permeability the aluminum steel formed on the surface of the alloy layers , high temperature oxidation resistance and abrasion resistance , and high temperature oxidation kinetics curves and wear power curve is drawn . Means of optical microscopy, scanning electron microscopy , X -ray diffraction study , the detection and analysis of Hot Dip aluminum, thermal diffusion infiltration of aluminum alloy layer composition and structure . The test to determine the optimal process parameters for Q235 Steel Hot Dip aluminum temperature of 770 ° C , infiltration time of 13 minutes ; the Q235 steel thermal diffusion aluminized optimal process parameters for the diffusion temperature of 950 ° C , the diffusion time is 6 hours . The results showed that : high temperature oxidation resistance highest thermal diffusion aluminized steel , about 1.5 times the Hot Dip Aluminized steel specimens , impregnated aluminum steel 6 times ; thermal diffusion aluminized steel wear resistance , is about 4 times the hot Dip Aluminized steel , hot dip aluminizing steel 7 times . Conclusion The analysis shows that : Hot Dip aluminum carbon steel nitrided layer is divided into two layers, the surface layer of pure aluminum layer and transition alloy layer ; diffusion diffusion layer of the treated steel distinct inner diffusion layer and the outer diffusion layer , internal diffusion the the Fe3A1 and a small amount of FeAl , the outer diffusion layer of the FeAl and small amounts of this Fe3A1 . Thermal diffusion process in the steel surface to form a continuous, dense Fe2Al5 phase and FeAl3 phase chemical properties stability, density than A12O3 good , so the thermal diffusion aluminized steel Hot Dip Aluminized steel has better resistance to high temperature oxidation performance and wear resistance.

Related Dissertations

  1. Studies of Plasma Spray Metal-Ceramic Compounds Coatings on Q245r Steels,TG174.44
  2. Study on High Silicon Coating by Dc-Plasma Jet Surface Metallurgy,TG174.4
  3. The Preparation and Properties of Ternary Boride Mo2 FeB2 Based Cermets,TG148
  4. Corrosion Behavior of Bulk Nanocrystalline 304 Stainless Steel,TG172
  5. The Design of Wear Test for the Needle Bearing of Civil Aircraft’s Flap,V231.96
  6. Surface Microstructures on Titanium Alloy with EDM and Their Tribological Properties in Water Lubrication,TG661
  7. Study on Wear of Non-Standard Diesel and DME Engine’s Plunger Matching Parts,U464.173
  8. Comprehensive Application of XRF and Microscopic Image Technique in Aero-engine Intelligent Monitoring,V263.6
  9. Austenitic stainless steels and high temperature oxidation behavior of grain growth,TG142.71
  10. Automotive parts wear remediation techniques applied research,U472
  11. Studies on High-temperature Chemical Stabilities of Cu-Co-Cr Alloys Prepared by Mechanically Alloying,TG132.32
  12. Abrasion Emulation Research of Screw-lining of Progressive Cavity Pump,TE933.3
  13. A Study on Tribological Properties of Ceramic Class Composite Materials in Water,TB302.3
  14. Study on Wheel/rail Curve Noise and Wear Mechanism and Lubrication Control Technology Based on Simulation Experiment,U216.42
  15. The Study on the Preparation and Performance of PS45-CuAl8 Pseudo-alloy Coating,TG174.442
  16. Preparation and Token of Fe3Si Metal Siliconized Layer on 304 Stainless Steel Surface,TG174.4
  17. Effect of Al and Co on Microstructure and Properties of K4169 Alloy,TG132.32
  18. Surface Modification of Porous Niti Shape Memory Alloy by High Temperature Oxidation and Chemical Oxidation,TG174.4
  19. Filling copper alloy mechanical properties of bimetallic piston pump,TH322
  20. The Plastic Deformation of Materials Under Impacting Load,TB302.3
  21. 1Cr10Co3MoWVNbNB resistant steel surface (Cr_ (1-X) Ti_X) N coatings Preparation and Characterization,TG174.4

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection > Metal surface protection technology
© 2012 www.DissertationTopic.Net  Mobile