Aluminum alloy for bicycle frame tube and preparation method thereof

A technology for bicycles and aluminum alloys, which is applied in the field of aluminum alloys for bicycle frame pipes and its preparation, can solve the problems of insufficient welding process performance, insufficient strength, and difficulty in passing the frame, and achieve fine grain size, improved safety and reliability, and extrusion The effect of smooth pressing process

Active Publication Date: 2014-01-01
TIANJIN GOLDEN WHEEL BICYCLE GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in view of the existing aluminum alloy in the manufacture of bicycle frame tubes, the strength is insufficient or the welding process performance is insufficient, or the frame is difficult to pass the bicycle safety standard published by the EU Standardization Committee, the present invention Silicon, magnesium, copper, chromium compound alloying is used to improve the strength, and the plasticity and welding performance are improved by adding manganese, rare earth erbium and zirconium, so as to obtain an aluminum alloy for bicycle frame pipe with high strength, good plasticity and excellent welding performance and its preparation method

Method used

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  • Aluminum alloy for bicycle frame tube and preparation method thereof
  • Aluminum alloy for bicycle frame tube and preparation method thereof

Examples

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Embodiment 1

[0023] An aluminum alloy for a bicycle frame tube, which consists of the following components by weight percentage:

[0024] 1.6%Mg, 1.8%Si, 1.2%Cu, 1.4%Mn, 0.30%Cr, 0.60%Er, 0.20%Zr, the balance is Al and unavoidable impurities. Its preparation method comprises the following steps:

[0025] Step 1, transfer the electrolytic pure aluminum liquid into the smelting furnace, add the silicon, manganese, chromium, and copper to the content requirements respectively with crystalline silicon, metal manganese, metal copper, and metal chromium pure substances according to the weight percentage, heat and melt and Stir evenly to obtain alloy melt;

[0026] Step 2, control the temperature of the alloy melt at 750°C, add metal magnesium ingots into the melt, make it melt and stir evenly;

[0027] Step 3, control the temperature of the alloy melt to 740°C, add 1.5% aluminum alloy refining agent or blow in aluminum alloy refining gas and stir and refine for 30 minutes, after removing scum,...

Embodiment 2

[0040] An aluminum alloy for bicycle frame tubes, which consists of the following components by weight percentage: 1.1%Mg, 1.3%Si, 0.9%Cu, 1.0%Mn, 0.2%Cr, 0.3%ER, 0.15%Zr, and the balance is Al and unavoidable impurities. Its preparation method comprises the following steps:

[0041] Step 1, heat and melt the electrolytic aluminum ingot to 750°C, and add the silicon, manganese, chromium, and copper to the content in the form of aluminum-silicon, aluminum-manganese, aluminum-chromium, and aluminum-copper master alloys according to weight percentages. Requirements, heat and melt to obtain alloy melt and stir evenly;

[0042] Step 2, control the temperature of the alloy melt within the range of 740°C, add metal magnesium ingots into the melt, make it melt and stir evenly;

[0043] Step 3, control the temperature of the alloy melt to 730°C, add 1% aluminum alloy refining agent or blow in aluminum alloy refining gas and stir and refine for 20 minutes, after removing scum, cover w...

Embodiment 3

[0056] An aluminum alloy for bicycle frame tubes, which consists of the following components by weight percentage: 0.8%Mg, 0.8%Si, 0.7%Cu, 0.6%Mn, 0.10%Cr, 0.1%Er, 0.08%Zr, and the balance is Al and unavoidable impurities. Its preparation method comprises the following steps:

[0057] Step 1: Heat the pure aluminum ingot to 720°C, and add the silicon, manganese, chromium, and copper to the content requirements in the form of aluminum-silicon, aluminum-manganese, aluminum-chromium, and aluminum-copper master alloys according to weight percentages. , heated and melted to obtain alloy melt and stirred evenly;

[0058] Step 2, controlling the temperature of the alloy melt in the range of 730°C, adding metal magnesium ingots into the melt to melt and stir evenly;

[0059] Step 3. Control the temperature of the alloy melt to 720°C, add 1%-2% of aluminum alloy refining agent or blow in aluminum alloy refining gas and stir and refine for 10 minutes. After removing scum, cover with c...

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Abstract

The invention discloses an aluminum alloy for a bicycle frame tube and a preparation method thereof, wherein the aluminum alloy aims at solving the technical problems that the intensity of the existing aluminum alloy which is used for manufacturing the bicycle frame tube is not good or the welding process property is not good or the safe reliability is not good. The aluminum alloy comprises the following components according to weight percentage 0.8-1.6% of Mg, 0.8-1.8% of Si, 0.7-1.2% of Cu, 0.6-1.4% of Mn, 0.10-0.30% of Cr, 0.1-0.6% of Er, 0.08-0.20% of Zr, and the balance Al and inevitable impurities. The aluminum alloy provided by the invention have the beneficial effects that the intensity of the aluminum alloy is good, the plasticity is good, the light weight of a bicycle is realized, the intensity of the bicycle frame tube which is made of the aluminum alloy is greater than 450MPa, and the extending ratio can be kept to be more than 10%; the welding property and the extrusion property are excellent, the welding requirements on the extrusion moulding of the bicycle frame tube and a frame are met, and the aluminum alloy can smoothly pass the European standard safety test.

Description

technical field [0001] The invention relates to the field of aluminum alloys for bicycles, in particular to aluminum alloys for bicycle frame pipes and a preparation method thereof. Background technique [0002] Aluminum alloy bicycles have the outstanding advantages of light weight and beautiful appearance, and their demand is expanding rapidly. At present, the aluminum alloy pipe materials used for bicycles mainly include three kinds of aluminum alloys such as 6061, 6063 and 6082. The main alloying elements of these alloys are magnesium and silicon, and by forming Mg 2 The Si phase achieves dispersion strengthening. Where silicon is removed to form Mg 2 In addition to the Si phase, there is generally a certain excess, that is, the mass ratio of magnesium to silicon Mg / Si<1.73. Its tensile strength is generally 230-310MPa, and increases with the increase of excess silicon, and can reach up to 310MPa after heat treatment. The solid solution speed of magnesium and sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C21/16C22C21/00
Inventor 邢书明
Owner TIANJIN GOLDEN WHEEL BICYCLE GRP
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