Effect of remelting power on the microstructure and tribological properties of the deposited layer reinforced by Co3Fe7 generated in situ

Due to the fast heating and cooling rate, poor forming quality is often found, which leads to the properties of deposited layer reinforced by Co 3 Fe 7 generated in situ is difficult to meet the performance requirements of part. To solve this problem, different content of Co 3 Fe 7 is generated in situ in the Fe-based deposited layer by adjusting the Co content, and laser remelting with various power is performed on the deposited layers. The main phase composition and the microstructure of deposited layers is characterized. The tribological properties of deposited layers are studied. The results show that an increase in remelting power does not lead to the generation of new compounds in the deposited layer, but leads to a change in the distribution of elements and Co 3 Fe 7 . An increase in remelting power leads to an increase in the coefficient of friction, wear width, wear depth and wear rate and a deterioration of the tribological properties of deposited layer. The change in remelting power does not cause change in trends of coefficient of friction, wear width, wear depth and wear rate with the change in cobalt content. Similarly, the change in cobalt content does not cause change in trends of coefficient of friction, wear width, wear depth and wear rate with the change in remelting power. The change in cobalt content and remelting power do not lead to changes in the wear form. When the cobalt content is 10 wt% and remelting power is 550 W, the deposited layer has excellent tribological properties.