The Elevated Temperature Wear Analysis of Laser Surface-Hardened EN25 Steel Using Response Surface Methodology

摘要

The wear behavior of as-received and laser-hardened EN25 low-alloy steel is performed in dry sliding condition using a pin-on-disc-type machine. A response surface methodology-based Box-Behnken design is used to design the experimental matrix by reducing the number of experimental conditions and to develop mathematical models between the key process parameters. The process parameters considered are applied load, temperature, and sliding distance and the responses are wear rate and coefficient of friction. Analysis of variance is used to analyze the developed model. Laser surface-hardened samples exhibit a lower wear rate (0.099 x 10(3) to 0.490 x 10(3)mm(3)/m) and coefficient of friction (0.080 to 0.245 mu) compared to as-received samples.