Abstract:
The Fe-C (0.8%C) raw material is pressed and molded by powder metallurgy technology. The influence of end-face friction and wear conditions on the PV limit of powder metallurgy technology Fe-C (0.8%C) specimens were instigated. The results are shown below. The PV limit increases linearly with sliding speed within the 0.2-0.8 m/s velocity range, which reaches a maximum of 5.17 MPa·m/s at 0.8 m/s, but the galling occurs easily when the velocity is increased to 1 m/s. The PV limit inversely correlates with load amplitude increase within 200-500 N/10 min. At the same linear velocity, the smaller the loading amplitude, the closer the test result's PV limit is to the material's actual value. When the green density is 5.9-6.5g/cm3, the PV limit at the end of the test is 4.31MPa·m/s. The PV limit is 4.59MPa·m/s when the green density increases to 6.8g/cm3, which is mainly related to the roughness of the grinding surface.