Підвищення зносостійкості сталевих деталей мікродуговим оксидуванням

Abstract. Microarc oxidation (MAO) is used to improve the wear and corrosion resistance of agricultural, road construction and mining machinery parts. Applying layers of aluminum to a steel product and then converting part of it into corundum ceramics will help to create maximum hardness, wear resistance and high adhesion strength. Problem. Abrasive and corrosion-abrasive wear causes the greatest damage to agricultural, road construction and mining machines. Natural abrasive, consisting mainly of SiO2 particles with a hardness of HV = 10 GPa, can only be protected by using materials with a hardness higher than the hardness of the abrasive. The solution to this problem is the application of wearresistant layers. Increasing wear resistance can be achieved by producing corundum ceramics by the micro-arc oxidation (MAO) method. Goal. The goal is to create wear-resistant corundum coatings on 40KhS steel by microarc oxidation with gas-plasma spraying of an aluminum layer. Methodology. The X-ray diffraction analysis of the coatings was performed in this work. The X-ray analysis was performed at room temperature using a DRON-4 diffractometer in monochromatic Kα-Cu radiation. When deciphering the obtained diffractograms, the ASTM. Originality. The study showed that it is possible to form a high-hardness (HV ≈ 17 GPa) oxide coating on an aluminum layer deposited by gas plasma spraying on 40KhS steel. Practical value. The resulting structure and high hardness of MАO coatings are a prerequisite for ensuring their high wear resistance to abrasive wear and corrosive environments experienced by parts of agricultural, earthmoving and road machines.