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Metal surface treatment and heat treatment processing are an indispensable part of modern industrial production. They are of great significance for improving the quality and performance of metal products, prolonging their service life, and enhancing the competitiveness of products. This article will elaborate on the definition, purpose, method and application of metal surface treatment and heat treatment.
1. Metal surface treatment.
Metal surface treatment refers to the process of cleaning, modifying or changing the surface properties of a metal surface through certain physical, chemical or mechanical methods. Its purpose is to improve the performance of the metal surface in terms of corrosion resistance, wear resistance, aesthetics, etc.
1.Cleaning treatment.
Cleaning treatment is the first step of metal surface treatment, and its purpose is to remove oil, oxide, rust and other impurities on the metal surface, and provide a good foundation for subsequent treatment. Common cleaning methods include mechanical cleaning, chemical cleaning, and electrochemical cleaning.
2.Coating treatment.
Coating treatment is the method of coating one or more layers of material on the surface of a metal to change its surface properties. The coating material can be metal, alloy, ceramic, organic material, etc. Coating treatment can not only improve the corrosion resistance and wear resistance of metal, but also enhance its aesthetics and functionality. Common coating treatment methods include spraying, electroplating, chemical vapor deposition, etc.
3.Surface modification treatment.
Surface modification treatment is to change the microstructure, chemical composition or surface energy and other properties of the metal surface through physical or chemical methods to achieve the purpose of improving surface properties. Common surface modification treatment methods include laser surface treatment, ion implantation, plasma spraying, etc.
2. Heat treatment processing.
Heat treatment refers to the method of changing the internal structure, properties and shape of metal materials through processes such as heating, heat preservation and cooling. Its purpose is to improve the mechanical properties, process properties and corrosion resistance of metals.
1.Annealing.
Annealing is a process in which a metal material is heated to a certain temperature, kept warm for a certain period of time, and then cooled slowly. Its purpose is to eliminate the stress inside the metal, refine the grains, and improve the mechanical properties such as plasticity and toughness. Common annealing treatment methods include complete annealing, spheroidizing annealing, stress relief annealing, etc.
2.Normalizing treatment.
Normalizing is the process of heating a metal material to a suitable temperature, keeping it warm, and then cooling it naturally in the air. The aim is to obtain a homogeneous microstructure and good mechanical properties. The normalized metal has high strength and hardness, which is suitable for manufacturing parts and components with high requirements.
3.Quenching treatment.
Quenching is the process of heating a metal material to a quenching temperature and cooling it quickly after holding it. The aim is to obtain a tissue with high hardness and high wear resistance. The quenched metal has higher hardness and strength, but lower plasticity and toughness. Common quenching methods include water quenching, oil quenching, air quenching, etc.
4.Tempering treatment.
Tempering treatment is the process of heating the quenched metal material to a certain temperature, keeping it warm and then cooling it. Its purpose is to eliminate the internal stresses caused by quenching and improve the plasticity and toughness of the metal while maintaining a certain hardness. The tempered metal has good comprehensive mechanical properties, and is suitable for manufacturing parts and components that are subjected to complex stress and impact.
3. Application of metal surface treatment and heat treatment processing.
Metal surface treatment and heat treatment processing have a wide range of applications in industrial production. They are widely used in various fields such as automobiles, machinery, electronics, aviation, ships, etc. For example, in automobile manufacturing, metal surface treatment and heat treatment processing can improve the corrosion resistance and wear resistance of automobile parts and prolong the service life of automobiles; In machinery manufacturing, metal surface treatment and heat treatment processing can improve the strength and hardness of mechanical parts, and improve the performance and accuracy of machinery.
In short, metal surface treatment and heat treatment processing are an indispensable part of modern industrial production. They provide strong support for industrial production in various fields by changing the surface properties and microstructure of metals, improving the quality and performance of metal products. With the continuous progress of science and technology and the continuous development of industry, metal surface treatment and heat treatment processing technology will also be constantly updated and improved, bringing more possibilities and opportunities for future industrial production.