| Popis: |
Friction surfacing is an advanced process of great potential and an enhanced technology in surface modification. It is a solid state process, which allows deposition welding at temperatures below the melting range. The present study is on the coating of stain-less steel on Spheroidal Graphite Iron through the process of friction surfacing. This work explains the perfection obtained through various combination of the parameters used in friction surfacing namely traverse speed, rotational speed and the applied load. Series of test was performed on the friction surfaced work piece. Fine bonding has been accomplished between the selected materials out of the process done with variable combination of process parameters. Mechanical tests like bending test, micro-hardness test and corrosion test were conducted. Appreciable hardness values (200 HRC) have been obtained in micro-hardness test. Bend test performed on the surface revealed good strength and reliability of the bonding. The Corrosion test was conducted to find the suitability of these deposits for chemical pumps, pressure vessels and joints of dissimilar metals. The presence of pearlite and ferrite matrix in the microstructure exemplifies the strength of the bond. These results are expected to find great use for important applications in defence, aerospace, electrical, automobile and many other industrial sectors in the engineering fields. |
