Research on Friction and Wear Mechanism of Gun Barrel Matrix Material

The process of the rotating band squeezing into the rifling is driven by high temperature and high pressure gunpowder gas when the gun is fired. This process is accompanied by the wear at the beginning of the rifling, and the wear of the beginning of the rifling is one of the important technical indexes to evaluate the life of the gun barrel. Therefore, it is of great significance to study the friction and wear mechanism of the barrel material for the improvement of the life of the barrel. A test method for friction and wear of rotating band and barrel material based on pin-disk friction pair was established, and the friction process between the barrel and rotating band material was simulated. The results show that the main wear mechanism of the rotating band and barrel material is adhesive wear at room temperature, slightly oxidized adhesive wear at 300 ℃, and oxidized adhesive wear at 600 ℃. Based on the improved Archard wear model, a mathematical model of the relationship between wear rate of barrel materials and temperature, pressure, velocity was established. The wear rate of barrel material is inversely proportional to temperature and proportional to pressure and velocity, and the increase of wear rate caused by the increase of pressure is much higher than that caused by the increase of velocity, which is consistent with the law of wear amount in different parts of the barrel.