The invention provides a high performance
cutting pick and a manufacturing method thereof, the high performance
cutting pick comprises a tooth tip and a tooth body. The tooth body is high-strength, high-
toughness and high-wear-resistance steel. The chemical components are as following by weight percent, 0.30 to 0.40 of C, 2.30 to 2.50 of Si, 2.20 to 2. 60 of Mn, 0.80 to 1.50 of Cr, 0.35 to 0.45 ofMo, 0.01 to 0.1 of Re, 0.02 to 0.04 of Nb, less than 0.01 of S, less than 0.01 of P, and the rest of Fe. After raw materials are refined and cast to obtain steel ingots or subjected to
continuous casting to obtain
continuous casting billets, after being rolled into round steel,
cutting and annealing are conducted, and finally a cutting pick body is obtained by cold
forging. The tooth tip is prepared from
cemented carbide and welded to the tooth body by
medium frequency induction heating. After cooling,
austempering treatment is conducted, and finally discharging and air-cooling to
room temperature are conducted. The finally obtained tooth body has tensile strength sigma b of 1700 to 2000MPa, yield strength sigma s of 1100 to 1520MPa, elongation
delta of 16 to 35%, section shrinkage phi of45 to 55%,
impact work Aku of 55 to 90 J,
hardness HRC of 53 to 62, and strong plastic product of 32 to 51 GPa.%. The
microstructure of the tooth body is a nano-
carbide-free
bainite-martensitic multiphase organization, and the thickness of a
substructure slat is 10 to 50 nm.