Thread Content
Metal materials are engineering materials with a long history and well-developed technology. Bronze wares appeared in our country as early as the Shang Dynasty, while iron tools were used starting from the Spring and Autumn and Warring States periods. As human civilization has evolved, metal materials have played an important role. They can be found in every aspect of our lives (food, clothing, shelter, transportation), such as land, sea, and air transport systems, various vehicles, bridges, buildings, mechanical tools, and the defense industry, to name just a few examples. In the machinery manufacturing industry, as well as in various industrial sectors such as metallurgy, mining, ports, power generation, coal mining, building materials, and others under complex operating conditions, there are certain metal materials that are used in environments characterized by high temperatures, high pressures, and rapid friction. Their ability to resist damage under load is referred to as mechanical properties (or physical properties). Due to the different properties of external loads (such as tension, compression, torsion, impact, cyclic loading, etc.), many workpieces and equipment fail rapidly as a result of wear. Although material friction, wear, and corrosion rarely cause catastrophic damage to metal workpieces, the economic losses they entail are quite substantial. Therefore, under complex operating conditions, wear resistance represents a new challenge for metal mechanical material components. When selecting a wear-resistant coating, the primary consideration is of course the material’s wear resistance. The adhesion between the wear-resistant material and the metal substrate is also an important factor; no matter how good a material’s wear resistance may be, if it cannot bond well to the metal base, it will peel off after a short time, and such a material cannot be effectively utilized. Furthermore, the treatment technology for wear-resistant coatings is also crucial. When coating some more complex metal materials, many techniques are difficult to apply or impossible to use. In contrast, spraying technology is simple to operate, easy to implement, and not restricted by the shape of the substrate, making it more convenient for treatment. Therefore, using wear-resistant materials with strong adhesion for spray coating surface treatment of metal materials is a practical method to improve their wear resistance. It would be even better if the wear-resistant material also had resistance to acid and alkali corrosion, impact resistance, and low friction. Currently, such wear-resistant materials represent the research and development direction for surface-treated wear-resistant materials.