Improvement of the product surface layer by friction stir processing method
- Uliasz P. ,
- Blicharski M. and
- Knych T.
- Uliasz P. ,
- Blicharski M. and
- Knych T.
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The use of semi-friction stir processing to improve the facing surface layer of flange joints in casings of high-voltage switchgears, filled with electro-insulating SF6 gas, was examined. The influence of tool shape and size, and welding parameters on the porosity, microstructure, penetration depth, hardness and defects was investigated. the frames of the switchgears were of En AC-42100 hypo-eutectic AlSi7Mg0.3 casting alloy (Al, 0.04%Cu, 7.5%Si, 0.38%Mg, 0.087%Mn, 0.2%Fe, 0.11%Ti,. 0.02%Zn). The proposed tool design, which has the shape of a truncated cone, is described. Optimal parameters for removing casting defects from the surface layer of the final product were determined.
8th International Symposium, 18-20 May 2010, Session 7B: Aluminium and Repair, Paper 04
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