DEVELOPMENT OF TECHNOLOGY FOR IMPROVING THE WEAR RESISTANCE OF THE WORKING SURFACES OF RIFLED BARRELS OF ARTILLERY SYSTEMS AND INCREASE THEIR RESOURCE

Abstract

The accuracy of the damage and the outcome of the battle depend on the durable wear resistance of the inner surface of the artillery barrels. When fired, there is close contact between the surface of the barrel and the rings of softer metal on the projectile (this is for the tightness of the system), which leads to their active abrasion. True, the softer surfaces of the rings on the projectile wear more, but with such rapid mutual movement of the surfaces, the harder materials of the barrel also wear. As a result, the tightness of the powder gases is violated and, accordingly, the power of the shot and the flight range of the projectile, as well as the amplitude of the oscillation of the projectile during its passage through the barrel increases. This in turn affects the accuracy of hitting the target, especially at long distances. For close combat, this is not a big problem, but long-range artillery systems are most important now. In this regard, the purpose of this research is to develop a technology for manufacturing a cannon barrel with the most wear-resistant inner surface. At the same time, a brief review of artillery systems, which are currently used mainly in the Russian-Ukrainian war, is made. The scheme of the manufacturing technology of rifled tank barrels with an increased resource of aiming lesions is described. The methodology is based on the technology of their surface hardening with high-frequency currents and grinding of microcracks, which appear as a result, developed by the authors. The main factors that ensure a high resource of barrels according to the technology are their high heat resistance and wear resistance. Heat resistance is achieved by optimizing the material on the samples, wear resistance by optimizing the parameters of the surface hardening technology of the inner surface of the barrel. The method of calculating the survivability of the barrel is given, when after hardening and grinding of the barrel, a micro crack remained on its inner surface.