The Effect of External Roller-Burnishing on the Surface Roughness and Surface Hardness of EN 24 Alloy Steel
Keywords:
Roller burnishing, surface roughness, surface hardnessAbstract
Surface finish and surface hardness of the components play vital role in quality of products. In most of the conventional finish machining process only surface finish will be improved, but improvement on surface hardness is less considerable. More over all finishing process are metal cutting in nature and introduces tensile stresses in the surface layer. But instead of tensile stress, if compressive stresses are introduced in surface layer, it will improve various properties of components like fatigue strength. Therefore the requirement in finishing an industrial component is that the process should improve surface finish, surface hardness and induce compressive stresses in the surface layer. A process of finishing by surface plastic deformation can meet this requirement. One of such process, which was in use since long time is “Burnishing”. Even though the process is an old one its process parameters were not fully established, because of which it is not finding wide range of industrial application. In Burnishing, the surface layer will be plastically deformed with the help of a Ball or Roller which is harden than the work material. The process parameters include Burnishing Force, Burnishing Speed, Burnishing Feed, and Number of Tool Passes. In the present study external burnishing tool is used to perform roller burnishing process on EN 24 alloy steel to study the surface properties variation by varying the burnishing parameters like force, speed, feed and number passes.
Downloads
References
A.M. Hassan and A.D.Auleiman, Improvement in the wear resistance of brass components by ball burnishing process. “Journal of Mater.Proc.Technol.”96 (1-3) (1999) 73-80.
G. Brandt. A. Gerendas and M.Mikus, Wear mechanisms of ceramic cutting tools when machining ferrous and non ferrous alloys.” J.Eur.Ceram.Soc. 6(5) (1990) 273-290.
G.Schneider Jr. Cutting Tool Applications, Prentice-Hall Publication, 2002. pp 2-65 (chapter 1)
A.R.C Sharman, D.K. Aspinwall, R.C Dewew and P.Bowen, Work piece surface integrity considerations when finish turning gamma titanium almunide, Wear 294 (2000) 473-481.
L. Kukeilka, Designating the field areas for the contact of rotary burnishing element with the rough surface of a part, providing a high-quality product, Journal of mechanical Technology 19(1989) 319-356.
C. Wick and R.F.Veilleux, Tool and manufacturing engineers hand book, Soc. Manuf.Eng 3 (1985) 16-38.
T.Siva Prasad, B. Kotiveerachari, External burnishing of aluminum components, J. Inst. Engg. India69 (1988) 55-58.
N.H. Loh, S.C.Tam and S. Miyazawa, Applications of experimental design in ball burnishing, Int. J.Mach.Tools MAnuf. 33 (1993) 841-852.
Ted Busch, Roger Harlow and Richard.L.Thompson, 1998, A text book on “Fundamentals of dimensional Metrology”, 3rd edition, Delmar publishers.
Klocke F liermann J, 1998, Roller Burnishing of hard turned surfaces, International Journal of machine tools and manufactures 38/5-6,419-423.
G.M.L.Gladwell, contact problems of classical theory of elasticity (1980)
N.S.M.EI-Tayeb, enhancement of surface quality and tribological properties during ball burnishing process.
A.M.Hassan, an investigation into the surface characteristics of burnished cast Al- Cu alloys, International machine tool manufactures 37(6) 1997.
A.M.Hassan. Influencing of burnishing process on surface roughness and hardness and micro structure of some non ferrous metals.
M.H.EL Axir, An investigation in roller burnishing, International machine tool manufactures 40(2000)[1603-1617].
A.M.Hassan, The effect of ball and roller burnishing on the surface roughness and hardness of some non ferrous metals, International machine tool manufactures 72(3) (1997) 385-391.