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Aluminum alloy extrusion material for subway rigid suspension bus bar

An extrusion material and aluminum alloy technology, which is applied in the formulation and processing technology of aluminum alloy rigid suspension bus bar extrusion materials for urban rail transit, can solve the problems of cumbersome production process, decreased electrical conductivity, and high quenching sensitivity, and achieve Reduced production cost, reduced resistivity, and small quenching sensitivity effects

Active Publication Date: 2013-12-18
GUANGDONG XINGFA ALUMINUM HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is based on the 6101B aluminum alloy and according to the actual use needs of the material, a more reasonable aluminum alloy formula is designed to overcome the following shortcomings of the existing aluminum alloy extrusion material used for the subway rigid suspension busbar , that is, the disadvantages of low rigidity, low electrical conductivity over time, high quenching sensitivity, and cumbersome production process

Method used

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  • Aluminum alloy extrusion material for subway rigid suspension bus bar

Examples

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Embodiment 1

[0013] Example 1: First, the aluminum ingots and the intermediate silicon ingots are loaded into the furnace, and the smelting operation is carried out. After the raw materials are melted and stirred evenly, the magnesium ingot and other element components are added after the slag is removed, and the mixture is uniform. The nominal composition of the ingot is (by weight percentage) , Sampling and analysis of chemical composition in the casting flow plate): magnesium 0.47%, silicon 0.52%, iron 0.19%, titanium 0.008%, copper m =245MPa; R p0.2 =215MPa; A=10.5%; ρ=0.02924Ω.mm 2 / m (equivalent to 59% of IACS).

Embodiment 2

[0014] Example 2: First, the aluminum ingots and the intermediate silicon ingots are loaded into the furnace, and the smelting operation is performed. After the raw materials are melted, the mixture is uniformly stirred. After the slag is removed, the magnesium ingot and other element components are added, and the mixture is uniform. The nominal composition of the ingot is (by weight percentage , Sampling and analysis of chemical composition in the casting flow plate): magnesium 0.46%, silicon 0.53%, iron 0.22%, titanium 0.006%, copper m =250MPa; R p0.2 =220MPa; A=10%; ρ=0.02897Ω.mm 2 / m (equivalent to 59.5% of IACS).

Embodiment 3

[0015] Example 3: First, the aluminum ingot and the intermediate silicon ingot are loaded into the furnace, and the smelting operation is carried out. After the raw materials are melted, the mixture is evenly stirred. After the slag is removed, the magnesium ingot and other element components are added and mixed evenly. The nominal composition of the ingot is (by weight percentage) , Sampling and analysis of chemical composition in the casting flow plate): magnesium 0.45%, silicon 0.55%, iron 0.23%, titanium 0.004%, copper m =240MPa; R p0.2 =212MPa; A=9.8%; ρ=0.02978Ω.mm 2 / m (equivalent to 58.3% of IACS).

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Abstract

The invention belongs to the field of metal materials, and particularly relates to a formula and processing technique of an aluminum alloy rigid suspension bus bar extrusion material for urban rail transportation. The aluminum alloy comprises the following elements in percentage by weight: 0.45-0.50% of magnesium, 0.50-0.55% of silicon, 0.10-0.25% of iron, at most 0.05% of copper, at most 0.01% of manganese, at most 0.01% of chrome, at most 0.01% of titanium, at most 0.01% of vanadium, at most 0.10% of zinc, at most 0.10% of other impurities (at most 0.03% for each impurity) and the balance of aluminum, totaling 100%. The preparation method comprises the following steps: melting, stirring, component regulation, hot top casting, heat treatment, ingot blank sawing, extrusion molding, cooling and the like. The aluminum alloy provided by the invention has the advantages of high strength, favorable toughness, favorable conductivity, low quench sensitivity, low production cost and the like, and can be used for large-scale production.

Description

Technical field [0001] The invention belongs to the field of metal materials, and particularly relates to a formula and processing technology of an aluminum alloy rigid suspension busbar extrusion material for urban rail transit. technical background [0002] At present, the busbar of the overhead rigid suspension system of urban rail transit in China is made of 6101 or 6101B aluminum alloy extruded material with π-shaped cross section. The two vertical side ends form jaws, which can be elastically opened to allow copper contact wires to be embedded , And restore naturally after the external force is removed, its elasticity generates pressure to clamp the contact line, which can effectively prevent the busbar from sliding relative to the contact line when it is telescopic. The main function of the busbar is to conduct current and clamp the contact wires. The technical index requirements for the busbar are: tensile strength ≥215MPa, yield strength ≥160MPa, elongation ≥8%, volume ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043
Inventor 罗铭强
Owner GUANGDONG XINGFA ALUMINUM HENAN
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