Using double-layer glow ion penetration metal technology, Mo-Cr co-infiltration is carried out on the surface of the steel, followed by supersaturated carburizing, quenching and tempering composite treatment. The thickness of the Mo-Cr bent layer is more than 100 microns, and the surface Mo content Up to 20%, Cr content reaches 10%, supersaturated carburizing surface carbon content exceeds 2.0%, surface composition is close to molybdenum series high speed steel, surface hardness after quenching and tempering is as high as 1300HV, exceeding general metallurgical high speed steel. Wear tests show that the friction coefficient increases with the increase of contact stress, and the average relative wear resistance is 2.2 times that of GCr15 carburized and quenched steel.
use
1. Can be used for various grinding tool handles and other unimportant grinding tool parts.
2. GCr15, 9SiCr, T8 and 45 steel were used in the past. Due to the phenomenon of mold bite and mold sticking in the workpiece, it was difficult to punch out the forging blank from the mold, resulting in plastic deformation, bending and fracture of the punch, and a short service life. Approximately 800 to 1,200 bolts can be punched with 10 pieces of punches; Q235 steel is later used as the punch material. After quenching, it can be used directly without tempering. The hardness is 36 to 40HRC. Each ten pieces of punches can punch more than 2,000 bolts without failure. The form is plastic deformation, which solves the problem of the punch breaking during use and ensures the operator's personal safety.
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