Carbon steel is a kind of iron carbon alloy material, the carbon content is 0.0218%~2.11%. It also contains small amounts of silicon, manganese, sulfur and phosphorus. Generally, the higher the carbon content of carbon steel, the greater the hardness, the higher the strength, but the lower the plasticity.
The main influencing factors of carbon steel are:
1. Manganese: about 0.25%~0.80%. Solution strengthening; Remove FeO, reduce the brittleness of steel; And sulfide synthesis of MnS, that can reduce the harmful effect of sulfur. Beneficial.
2, silicon: about 0.10%~0.40%, solid solution strengthening; Except the FeO adverse impact on the quality of steel and beneficial.
3, sulfur: FeS and Fe form low melting point eutectic (melting point 985℃), in 1000~1250℃ hot processing lead to steel brittle and cracking, "hot brittle". Harmful.
4, p: strength, hardness increased, but lower the plasticity and toughness, "cold short," is harmful.
