Lead-based alloy introduction:In accordance with the performance and use of
lead alloy can be divided into corrosion resistant alloys, batteries, alloys,
solder alloys, printing alloy, bearing alloys and mold alloy. The lead alloy
used in chemical corrosion, radiation protection, the production of panels and
cable sets.
Lead alloy surface in the corrosion process, oxides, sulfides or other complex salt compound coated, to prevent the oxidation of sulfide, dissolved or volatilization role, have good corrosion resistance in the air, sulfuric acid, freshwater and marine sex. The lead alloy containing not dissolved in the lead or bismuth, magnesium, zinc and other impurities form the second phase, the corrosion resistance will be reduced; by adding tellurium, selenium can eliminate the harmful effects of impurities in the bismuth on the corrosion resistance. Antimony and tellurium, bismuth lead alloy can refine the grain structure, increase strength, inhibit the harmful effects of bismuth, to improve the corrosion resistance.
Lead alloy with low melting point (below 327 ℃), good fluidity, solidification shrinkage is small, less melt loss, composition changes remelting, casting of complex shape, a clear outline of the device, widely used in casting type and modeling . The pewter used in the printing industry have been five hundred years of history. From the model of production and the cast of characters lead alloy contains antimony to increase hardness and strength, reducing the role of solidification shrinkage; improve from the tin contained in the definition of the role of liquidity and profile. The use of low melting point lead alloy model material, production process is simple, and the life of the product changes and model refurbished very convenient
The deformation resistance of the lead alloy ingot without heating to rolling, extrusion process made of sheet, strip, pipe, bar and wire without intermediate annealing process. The tensile strength of the lead alloy for 3 ~ 7 kgf/mm2, much lower than most other metal alloys. Antimony is an important element for strengthening the matrix is only partially dissolved in the lead, both for the solid solution strengthening, but also for the aging hardening; but if the content is too high, toughness and corrosion resistance to change will lead alloy worse. Comprehensive performance considerations, the lead alloy used for the production of chemical equipment, pipe corrosion component to about 6% antimony is appropriate; for the production of connected components, 8% to 10% antimony. The lead-antimony alloy to join a small amount of copper, arsenic, silver, calcium, tellurium, etc., increase strength, known as a hard lead.
Due to the shear of lead alloy, the creep strength is low, the load and rolling shear under the action of the lead alloy is easy to deformation and thinning become a foil-like; and lead alloy, self-lubrication, adjustments, and shock absorption. noise, and thus is a good bearing alloy. Lead-based bearing alloy and tin-based bearing alloy collectively referred to as the locomotive bearing babbitt, can produce high load. Arsenic up to 2.5% to 3% lead alloy, suitable for the production of high load, high speed, anti heavy machinery bearing temperature rise.
Lead alloy effect
The lead alloy has characteristics that can not easily be X and gamma rays through the protective material can be used for radioactive work.
Lead alloys Note
Dust toxic lead alloy, the cast and have a good protective measures.
Lead alloy surface in the corrosion process, oxides, sulfides or other complex salt compound coated, to prevent the oxidation of sulfide, dissolved or volatilization role, have good corrosion resistance in the air, sulfuric acid, freshwater and marine sex. The lead alloy containing not dissolved in the lead or bismuth, magnesium, zinc and other impurities form the second phase, the corrosion resistance will be reduced; by adding tellurium, selenium can eliminate the harmful effects of impurities in the bismuth on the corrosion resistance. Antimony and tellurium, bismuth lead alloy can refine the grain structure, increase strength, inhibit the harmful effects of bismuth, to improve the corrosion resistance.
Lead alloy with low melting point (below 327 ℃), good fluidity, solidification shrinkage is small, less melt loss, composition changes remelting, casting of complex shape, a clear outline of the device, widely used in casting type and modeling . The pewter used in the printing industry have been five hundred years of history. From the model of production and the cast of characters lead alloy contains antimony to increase hardness and strength, reducing the role of solidification shrinkage; improve from the tin contained in the definition of the role of liquidity and profile. The use of low melting point lead alloy model material, production process is simple, and the life of the product changes and model refurbished very convenient
The deformation resistance of the lead alloy ingot without heating to rolling, extrusion process made of sheet, strip, pipe, bar and wire without intermediate annealing process. The tensile strength of the lead alloy for 3 ~ 7 kgf/mm2, much lower than most other metal alloys. Antimony is an important element for strengthening the matrix is only partially dissolved in the lead, both for the solid solution strengthening, but also for the aging hardening; but if the content is too high, toughness and corrosion resistance to change will lead alloy worse. Comprehensive performance considerations, the lead alloy used for the production of chemical equipment, pipe corrosion component to about 6% antimony is appropriate; for the production of connected components, 8% to 10% antimony. The lead-antimony alloy to join a small amount of copper, arsenic, silver, calcium, tellurium, etc., increase strength, known as a hard lead.
Due to the shear of lead alloy, the creep strength is low, the load and rolling shear under the action of the lead alloy is easy to deformation and thinning become a foil-like; and lead alloy, self-lubrication, adjustments, and shock absorption. noise, and thus is a good bearing alloy. Lead-based bearing alloy and tin-based bearing alloy collectively referred to as the locomotive bearing babbitt, can produce high load. Arsenic up to 2.5% to 3% lead alloy, suitable for the production of high load, high speed, anti heavy machinery bearing temperature rise.
Lead alloy effect
The lead alloy has characteristics that can not easily be X and gamma rays through the protective material can be used for radioactive work.
Lead alloys Note
Dust toxic lead alloy, the cast and have a good protective measures.
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Lead-based alloy
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