In the three body impact abrasive wear test of the sample corroded by salt spray, the impact load is 2J, and other parameters are the same as those in the previous section. In the impact abrasive wear experiment conducted at different time points, the experimental environment may change, and the most key is the difference in the quality of different batches of quartz sand. Therefore, the experiment can only be compared with the samples of the same batch, which is also a disadvantage of MLD-10 three body impact abrasive wear machine. Based on this, the experimental steel without salt spray corrosion is set as the control group in this experiment. The experimental results are shown in the figure. The wear weight loss of bainite Martian multiphase wear-resistant cast steel increases with the increase of salt spray corrosion time.
The relative wear resistance coefficient of experimental steel corroded by salt spray and control group was calculated ε， It can be obtained that the wear resistance of the sample after 1h salt spray corrosion is 0.90 times that of the non corroded sample, that is, 1H salt spray corrosion has little effect on the wear resistance of the experimental steel. The relative wear resistance coefficient between the sample and the control group after 2H salt spray corrosion ε The significant change is 0.58, indicating that salt spray corrosion seriously affects the wear resistance of the experimental steel in the period of 1-2h. When the salt spray corrosion time was 4h, the wear weight loss of the sample increased further, and the relative wear resistance coefficient was lower than that of the control group ε Reduced to 0.46. After the samples with salt spray corrosion time of 4h, the wear resistance of the samples with salt spray corrosion time of 8h and 24h did not decrease significantly, and the relative wear resistance coefficients f with the control group were 0.43 and 0.42 respectively, indicating that the influence of salt spray corrosion on wear resistance slowed down.