Friction and Wear Properties of Laser Cladding H13 Pin and Galvannealed Plate under Differential Temperature
摘要
To enhance the wear resistance of H13 steel surfaces, a Fe901 cladding layer was applied to the surface of the H13 steel. A pin-on-disk friction and wear tester were employed to simulate the differential temperature environment during hot stamping. The Fe901 cladding layer and the H13 steel quenching layer with high-temperature GA plate were compared to indicate the friction and wear properties. To study the phase, microstructure, and wear mechanism of pins and disks, a scanning electron microscope, energy-dispersive spectroscopy, and x-ray diffraction analyses were employed. The results demonstrate that the M23C6 and M7C3 hard phases increase the hardness of the Fe901 cladding layer; at 600, 700 and 800 °C, compared with the quenched pin, the friction coefficient of the Fe901 cladding pin decreased by 5.5%, 7.4%, and 6.6%, respectively, and the wear rate decreased by 24%, 33%, and 29%, separately. Increasing the temperature, the abrasive wear on the cladding pin surface gradually drops and reaches the negligible amount at 800 °C. In comparison with the quenching pin, the cladding pin reduces the abrasive wear; however, the oxidative wear is aggravated. The results show a reliable wear-resistant surface due to the Fe901 cladding layer.