(1) Advanced high-quality medium carbon steel. The carbon content of this steel (mass fraction, %) is ≥0.4. It has excellent wear resistance and reduced ductility. It is easy to deform and crack after quenching, so quenching is extremely important. It must be quenched after cutting and tempering. To avoid temper brittleness.
The cutting performance of this type of carbon steel can be improved by implementing spheroidization. This steel is usually tempered to a hardness of 19~22HRC before use to increase its cutting performance.
(2) Japanese standard channel steel hardness requirements: 180-280HBW
(3) Appearance requirements of Japanese standard channel steel: The surface quality and allowable deviation of geometric shape of channel steel are specifically specified in the standard. It is generally required that there should be no harmful defects on the surface and no significant torsion. It stipulates the allowable value of the corrugated bend (sickle bend) of the channel steel and the relevant parameters (h, b, d, t, etc.) of the surface shape of the channel steel of each specification. Value, tolerance value. The main manifestations of incorrect channel steel geometry are: corners, leg expansion, and leg merging, etc.
(4) Japanese standard channel steel has good machinability and cutability.
