Middle material, also called semi-finished material, refers to semi-finished products with certain mechanical properties, chemical composition and shape, which can be processed into finished products by processing with certain machining accuracy and finish. Generally, it refers to metal products, such as steel billets, microalloys, round steel, steel plates and sections.
Middle materials are widely used in engineering, not only in automotive industry and aerospace industry but also in many other industries. Their use can save costs, improve production efficiency, reduce pollution and difficulty in dimensional processing, as well as shorten the delivery time compared with ordinary parts.
For metal middle materials, the use of proper heat treatment technology can significantly improve the fatigue strength and wear resistance of metal materials. With the help of proper alloy addition elements, the strength and toughness of metal materials can also be improved.
Compared with ordinary finished products, metal middle materials have strong adaptability and pluralistic characteristics, which can better meet the needs of a variety of industries. Modern industry requires that the middle materials should have the characteristics of good plasticity, high strength, good wear resistance and other characteristics, which usually require special alloy addition elements and heat treatment.
In addition to metal materials, there are also a wide variety of other middle materials. For example, plastic middle materials are mainly used in automotive, electronics and other industries. These plastic middle materials can be divided into four categories: optical materials, high temperature materials, abrasion resistant materials and engineering plastics. In addition, the middle materials in the production of ceramic products are mainly refractory materials, which are often called ceramic raw materials.
In conclusion, middle materials are semi-finished products characterized by certain mechanical properties, chemical composition and shape, which can be processed into finished products by processing with certain machining accuracy and finish. It is widely used in many industries, saving costs, improving production efficiency, reducing pollution and difficulty in dimensional processing, and shortening the delivery time compared with ordinary parts.