45 steel (normalized after forging) low-magnification structure and non-metallic inclusions

，描述它们的相关知识，主要结构应为，包括1. Introduction；2. C45 Steel；3. Low Magnification Microstructure of C45 Steel；4. Nonmetallic Inclusions；5. Conclusion

Introduction

C45 steel is a medium carbon steel that is commonly used in engineering applications, due to its excellent strength, ductility, and heat-treatability. The steel contains components of both ferrite and pearlite in its microstructure, which gives it superior construction properties. This article will explore the low magnification microstructure of C45 steel, as well as the role of nonmetallic inclusions in the materials properties.

C45 Steel

C45 steel is an alloy containing 0.45% carbon, 0.45% silicon, 1.2% manganese, and small amounts of other trace elements. The high carbon content gives the material superior strength and hardness, making it extremely useful for creating robust structures for bearing purposes. C45 steel is also capable of undergoing significant heat treatments, allowing it to be used in a variety of environments.

Low Magnification Microstructure of C45 Steel

At low magnification, the microstructure of C45 steel consists of a mixture of ferrite and pearlite, as well as small amounts of martensite and bainite. Ferrite is a soft, ductile material, which is responsible for the steels overall strength, while pearlite is much harder and more wear-resistant. The small amounts of martensite and bainite also contribute to the steels strength and toughness.

Nonmetalic Inclusions

Nonmetallic inclusions are microscopically small particles or pores that are present in the microstructure of C45 steel. These inclusions usually consist of oxides, sulfides, and silicates, and range in size from several nanometers to a few micrometers. These inclusions have the potential to reduce the materials strength or impact its thermal properties. Smaller particles have a greater tendency to clog or interfere with the steels internal microstructure, leading to poor mechanical properties.

Conclusion

In conclusion, C45 steel is a medium-carbon alloy that contains components of both ferrite and pearlite in its microstructure. The steel also contains small amounts of nonmetallic inclusions, which can affect the materials strength and thermal properties. However, when these inclusions are kept to a minimum, C45 steel is an excellent choice for engineering applications.

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45# steel is a kind of alloy steel which has superior performance and wide application prospects. It is a kind of medium carbon steel and is mainly used in the manufacture of machine tool, parts and components.

45# steel has good plasticity and toughness and is suitable for processing. It also has good strength and hardness and is used for parts that require high strength and wear resistance. The strength and hardness can be improved through proper heat treatment.

The low magnification structure of 45# steel is ferrite and pearlite, and its microstructure is cellular and lamellar. Its average grinding heat sensitive plate has a width of 2.5mm, a thickness of 8mm, and a Brinell hardness of 187.

45# steel has low carbon content, so it is not prone to quenching grain, and its quenching performance is better. In addition, it also has good machinability and is not prone to surface cracks during quenching.

After 45# steel is quenched and tempered, there are few non-metallic Inclusions and fewer decarburized layers. The martensite is evenly distributed. The balance between the yield and tensile strength of the quenched and tempered 45# steel is better than that of medium carbon steel.

In summary, 45# steel is a kind of medium carbon steel with excellent performance and good plasticity and toughness. It has good strength and wear resistance and can be used for high-strength and wear-resistant parts. It also has good machinability and quenching performance and is widely used in the manufacture of machine tools and components.