On the modeling of dry sliding adhesive wear parameters of vanadium additive iron-based alloys at elevated temperatures

Abstract

Abstract In this paper, three different vanadium additive iron based hardfacing alloys were developed using shielded metal arc welding process with pre-placement technique — a newly developed approach to produce hardfaced coatings. The influence of the increased vanadium content on the hardness and dry sliding adhesive wear characteristics of alloys was investigated. A reciprocating wear test rig was used to study the effect of load and temperature on the alloys having variation in their vanadium content using a full factorial design of experiment approach. The increased vanadium content was found to be beneficial to enhance the macrohardness and adhesive wear resistance of the vanadium additive alloys in comparison to the non-vanadium additive alloy with no evidence of cracks or porosity. A significant reduction in weight loss of alloys containing higher vanadium content was observed from the main effect plots. Based on the significance of interactions, the regression equation was developed and validated with a number of test cases. The optimization of the control factors was also performed using a multi-response optimization technique. The confirmatory tests carried between the predicted and the experimental results exhibited the accuracy of the optimized input variables within ± 4.63% against an output of 0.007 g.