In this article, Baowu will show you a little knowledge about carbon steel.

Carbon steel is an iron-carbon alloy with a carbon content of 0.0218% to 2.11%. Also called carbon steel. Generally also contains a small amount of silicon, manganese, sulfur, phosphorus. Generally, the higher the carbon content in carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity.

Among them, manganese is about 0.25%-0.80%. Solid solution strengthening; removing FeO to reduce the brittleness of steel; synthesizing MnS with vulcanization, which can reduce the harmful effects of sulfur. is beneficial. Silicon is about 0.10%-0.40%, solid solution strengthening; in addition to the adverse effect of FeO on steel quality, it is also beneficial. Sulfur FeS and Fe form a low-melting eutectic, which causes the steel to become brittle and crack during hot working at 1000~1250 °C, which is harmful. Phosphorus increases strength and hardness, but reduces plasticity and toughness, which is also harmful.

In addition, carbon steel can be divided into three categories according to use: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is further divided into engineering construction steel and machine manufacturing structural steel.

Carbon structural steel is mainly used for general engineering structures and general mechanical parts. For example, Q235 can be used to make bolts, nuts, pins, hooks and less important mechanical parts, as well as rebars, profiles, and steel bars in building structures.

Carbon tool steel belongs to eutectoid steel and hypereutectoid steel, with high strength, hardness and good wear resistance, suitable for the manufacture of various low-speed cutting tools.

Cast steel is mainly used to manufacture relatively important mechanical parts with complex shapes and high mechanical properties, but it is difficult to form by forging and other methods in terms of technology, such as gearbox casings of automobiles, couplers and couplings of locomotives and vehicles.

The above is the main knowledge of carbon steel. In addition to this classification, carbon steel is also classified according to other forms. If you want to know more, you can pay attention to Baowu at any time, and we will update it from time to time.