1. Impact performance
After the impact test is completed, the impact absorption rate of bearing pedestal will change with the rise of temperature, increase with the rise of temperature, and decline after increasing to a certain extent. The impact test results with pouring temperature of 1460 ~ 1460 ℃ show that the impact absorption energy is the impact absorption energy of 69j sample, and the impact performance was the worst at that time. The impact test results at the pouring temperature of 1480 ℃ show that 75j sample has the same impact energy absorption capacity, and its absorption capacity is higher than that of the original sample. The test results show that when the pouring temperature is above 1520 ℃, it has the same impact energy absorption capacity, and the impact absorption capacity is greatly improved. The pouring temperature is below 1530 ℃, and the impact absorption capacity is 97j, which is the same as the maximum impact absorption capacity of the test shown in the test results. When the pouring temperature is 1540 ℃, the impact test results show that when the pouring temperature reaches 1540 ℃, the impact absorption capacity of the sample is 91J. According to the results of impact test, in order to show the best impact performance of mechanical bearing pedestal, the evaluation temperature is set to 1530c. By measuring the optimum impact strength of mechanical bearing pedestal at 1530 ℃, it is found that the longer the casting time is, the greater the impact strength is and the smaller the impact strength is. The impact test results under the condition of 45S casting cycle show that the impact absorption capacity reaches 61j, and the impact absorption capacity of the sample with flow delay of 60s is 68J. The impact test results show that under the condition of pouring time of 75s, the impact absorption capacity is 79j. In the impact test with pouring time of 90s, the impact energy of 97j is absorbed by the impact sample. When the injection time is 90s, the impact performance of the sample is the best, and the impact absorption capacity of the sample decreases gradually with time. The samples at the pouring temperature of 1530 ℃ have the smallest and deepest impact opening, and the samples injected at 1530 ℃ have the highest impact performance.
2. Wear resistance
The effect of pouring temperature on the wear resistance of samples decreases with the increase of temperature and increases with the increase of temperature. The wear amount of the sample is 14 at the casting temperature of 1530 ℃ × 17 at 103mm3, 1520 ℃ and 1540 ℃ × 103mm3、18 × 103 mm3. The effect of pouring time on the wear of samples was studied. The results showed that the wear trend gradually decreased with the increase of pouring time. When the pouring time is 90s, the wear amount of the sample is the smallest, and the wear amount is 28 respectively × 10-3mm3 to 14 × 10-3mm3, the pouring time is 75s and 105s respectively. The impact performance and wear performance of the bearing pedestal reach the best when the pouring temperature is 1530 ℃ and the pouring time is 90s. Therefore, it is determined that 1530 ℃ is the best pouring temperature of the bearing pedestal and the time is 90s.