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

Inactive Publication Date: 2007-11-14
厦门火炬特种金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low solid solubility of lead in zinc-nickel-nickel copper, most of them are distributed in free form, which leads to pollution of water sources due to the dissolution of lead during the use of lead-containing zinc-nickel-nickel components or after lead-containing zinc-nickel-nickel devices are discarded. soil, or

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 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 material ingredients, industrial pure copper, industrial pure nickel, industrial pure zinc, industrial pure bismuth, industrial pure iron, copper-manganese master alloy and rare earth cerium are melted in an intermediate frequency furnace, and poured into an industrial frequency furnace for heat preservation, at a semi-continuous level The casting method is used to produce φ55mm bar stock, which is cut to length and then extruded at 870℃ and cold drawn with small deformation to produce φ15mm bar stock. The lead-free free-cutting zinc cupronickel alloy made in this embodiment has a tensile strength of 495 MPa and a hardness of HB159.

Example Embodiment

[0018] Example 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 material ingredients, industrial pure copper, industrial pure nickel, industrial pure zinc, industrial pure bismuth, industrial pure iron, copper-manganese master alloy and rare earth cerium are melted in an intermediate frequency furnace, and poured into an industrial frequency furnace for heat preservation, at a semi-continuous level The casting method is used to produce φ55mm bar stock, which is cut to length and then extruded at 870℃ and cold drawn with small deformation to produce φ15mm bar stock. The lead-free free-cutting zinc cupronickel alloy made in this embodiment has a tensile strength of 490 MPa and a hardness of HB158.

Example Embodiment

[0020] Example 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 material ingredients, industrial pure copper, industrial pure nickel, industrial pure zinc, industrial pure bismuth, industrial pure iron, copper-manganese master alloy and rare earth cerium are melted in an intermediate frequency furnace, and poured into an industrial frequency furnace for heat preservation, at a semi-continuous level The casting method is used to produce φ55mm bar stock, which is cut to length and then extruded at 900°C and cold drawn with a small amount of deformation to produce a φ15mm bar. The lead-free free-cutting zinc-nickel alloy made in this embodiment has a tensile strength of 520 MPa and a hardness of HB162.

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Abstract

The invention discloses a Bi-containing, Pb-free, easy-to-cut zinc-whit copper alloy, belonging to the field of metal material making technique, comprising: Cu 60.0-63.0wt%, Ni+Co 17.0-19.0wt%, Bi 0.6- 1.0wt%, Mn =<0.5wt%, Fe =<0.3wt%, Ce 0.03-0.1wt%, and the rest Zn and inescapable impurities, where the lead content of the impurities is less than 0.03wt%. And it has excellent synthetic mechanical property, corrosion resistance, easy to cut, able to be made into rods, lines, and widely applied to precision parts, glasses fittings, slide fasteners, keys, optical and clocks and watches industries, etc.

Description

technical field [0001] The invention relates to a bismuth-containing lead-free free-cutting zinc-nickel-nickel alloy, which belongs to the technical field of metal material manufacturing. Background technique [0002] Zinc-nickel alloys containing lead (containing 1-2% Pb) have good cutting performance, corrosion resistance and hot and cold forming properties, and are widely used in precision parts, eyeglass accessories, zippers, keys, and optical and watch industries. Due to the low solid solubility of lead in zinc-nickel-nickel copper, most of them are distributed in free form, which leads to pollution of water sources due to the dissolution of lead during the use of lead-containing zinc-nickel-nickel components or after lead-containing zinc-nickel-nickel devices are discarded. soil, or pollute the atmosphere when waste is incinerated and waste is remelted. Lead is one of the heavy metals that are extremely harmful to the human body, and lead is not easy to remove after b...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C9/04
Inventor 彭海健闫晓东卢小军李德富
Owner 厦门火炬特种金属材料有限公司
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