What is high carbon steel?

High Carbon Steel (High Carbon Steel) commonly known as tool Steel, Carbon content from 0.60% to 1.70% , quenching and tempering. Hammers and crowbars are made of 0.75% carbon steel; cutting tools such as drills, taps and reamers are made of 0.90% to 1.00% carbon steel.
The surface of galvanized steel wire is smooth, smooth, no cracks, joints, prickles, scars and rust. The galvanized layer is uniform, strong adhesion, durable corrosion resistance, excellent toughness and elasticity.

The hardness and strength of high carbon steel mainly depend on the amount of carbon in solution, and increase with the amount of carbon in solution. When the carbon content exceeds 0.6% , the hardness does not increase, but the amount of excess carbide increases, the wear resistance of steel increases slightly, and the plasticity, toughness and elasticity decrease.

To this end, often according to the conditions of use and the strength of steel, toughness to match to choose different steel. For example, to make a spring or spring-type part with little force, choose 65 # high carbon steel with lower carbon content. General high carbon steel can be used electric furnace, open hearth, oxygen converter production. Higher quality or special quality requirements can be used electric furnace smelting plus vacuum consumption or electric, slag remelting.

In smelting, the chemical composition, especially the content of sulfur and phosphorus, is strictly controlled. In order to reduce segregation and improve isotropic property, ingot can be subjected to high temperature diffusion annealing (especially important for tool steel) . During hot working, the stop forging (rolling) temperature of hypereutectoid steel is required to be low (about 800 ° C) . After forging and rolling, the precipitation of coarse network carbide should be avoided. Prevent surface decarburization during heat treatment or hot working (especially important for spring steel) . During hot working, there should be enough compression ratio to ensure the quality and service performance of the steel.