Different Hardness Sol-Gel Surface Treatment of A390 Aluminium Alloy and its Tribological Effects

摘要

In this work, the suitability of aluminium A390 for bearing application is analyzed by means of sol-gel surface coating of Chromium nitrate Cr(NO_3)_3 of different hardness values. A380 is better known for its application as aluminium bearing material but it is little more costlier than A390. Therefore the ways in which A390 can be improved in properties like A380 is worked out in this work and sol-gel treatment technology associated with dip coating is utilized as the surface treatment technique. Wear loss and Specific Wear Rate analysis are done for these materials for comparing A390 with A380. In terms of specific wear rate, it is found that A390 hardened to 55 HRC has equivalent properties to A380 and cost effective.