Bismuth-contained lead-free easy-to-cut zinc-white copper alloy
A zinc-nickel-white copper and free-cutting technology, applied in the field of bismuth-containing lead-free free-cutting zinc-white copper alloys, can solve the problems of polluted water source, soil, polluted atmosphere, low solid solubility, etc. The effect of stable product performance
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Embodiment 1
[0017] The material composition is: 62.0wt% Cu, 18.0wt% Ni+Co, 0.8wt% Bi, 0.4%wtMn, 0.2%wtFe, 0.07wt% Ce, and the balance is Zn. According to the material composition, industrial pure copper, industrial pure nickel, industrial pure zinc, industrial pure bismuth, industrial pure iron, copper-manganese intermediate alloy and rare earth cerium are melted in the intermediate frequency furnace, poured into the industrial frequency furnace for heat preservation, and semi-continuously The casting method is used to make a φ55mm billet. After the billet is cut to length, it is extruded at 870°C and cold-drawn with a small amount of deformation to make a φ15mm bar. The lead-free free-cutting zinc-nickel-nickel alloy produced in this embodiment has a tensile strength of 495 MPa and a hardness of HB159.
Embodiment 2
[0019] The material composition is: 60.0wt% Cu, 19.0wt% Ni+Co, 1.0wt% Bi, 0.5wt% Mn, 0.3wt% Fe, 0.1wt% Ce, and the balance is Zn. According to the material composition, industrial pure copper, industrial pure nickel, industrial pure zinc, industrial pure bismuth, industrial pure iron, copper-manganese intermediate alloy and rare earth cerium are melted in the intermediate frequency furnace, poured into the industrial frequency furnace for heat preservation, and semi-continuously The casting method is used to make a φ55mm billet. After the billet is cut to length, it is extruded at 870°C and cold-drawn with a small amount of deformation to make a φ15mm bar. The tensile strength of the lead-free free-cutting zinc-nickel-nickel alloy produced in this embodiment is 490 MPa, and the hardness is HB158.
Embodiment 3
[0021] The material composition is: 63.0wt% Cu, 17.0wt% Ni+Co, 0.6wt% Bi, 0.2wt% Mn, 0.1wt% Fe, 0.03wt% Ce, and the balance is Zn. According to the material composition, industrial pure copper, industrial pure nickel, industrial pure zinc, industrial pure bismuth, industrial pure iron, copper-manganese intermediate alloy and rare earth cerium are melted in the intermediate frequency furnace, poured into the industrial frequency furnace for heat preservation, and semi-continuously The casting method is used to make a φ55mm billet. After the billet is cut to length, it is extruded at 900°C and cold-drawn with a small amount of deformation to make a φ15mm bar. The lead-free free-cutting zinc-nickel-nickel alloy produced in this embodiment has a tensile strength of 520 MPa and a hardness of HB162.
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