Effect of Chromium on Microstructure and Wear Resistance of Fe-Cr-C Hardfacing Alloys

In this paper, Fe-Cr-C hardfacing alloys with different chromium contents (7.5, 15, 20 and 32wt%, respectively) were deposited by PTA welding. Influence of Cr content on the hardfacing alloys was revealed by analyzing the microstructure, microhardness and wear behavior. The results showed that the primary phase changed from M3C to M7C3, and the eutectic phase changed from M7C3 to M23C6 with the addition of Cr content. The Cr content had a great influence on the hardness of the alloy. The higher the Cr content, the higher the hardness. The abrasiveness of the alloy was closely related to the Cr content. The wear resistance of the alloy increased with the addition of Cr content.