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High-strength aluminum-magnesium alloy wire for rivets and preparation method thereof

A technology of aluminum-magnesium alloy and aluminum intermediate alloy, applied in the field of high-strength aluminum-magnesium alloy wire for rivets and its preparation, can solve the problem of high cracking rate in cold heading, achieve good mechanical properties, and solve the effect of high cracking rate in cold heading

Active Publication Date: 2020-03-24
JIANGSU HENGTONG ELECTRICAL SPECIAL WIRE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a high-strength aluminum-magnesium alloy wire for rivets and a preparation method thereof. The present invention not only solves the problem of high cracking rate of wire rod cold heading through the innovation of components and process methods, but also Good mechanical properties can be obtained; in addition, under the premise of ensuring product performance, the process method is reasonable and economical

Method used

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  • High-strength aluminum-magnesium alloy wire for rivets and preparation method thereof
  • High-strength aluminum-magnesium alloy wire for rivets and preparation method thereof

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Effect test

Embodiment 1

[0031] An aluminum-magnesium alloy wire with better comprehensive performance for processing rivets, based on its total weight, includes the following components in mass percentages: Si 0.03wt%; Fe 0.12wt%; Mn0.10wt%; Mg 3.4 wt%; Cr 0.05wt%; V0.009wt%; Ti 0.015wt%; Be 0.0002wt%, the balance being Al and unavoidable impurities.

[0032] Its preparation method is as follows:

[0033] (1) Melting: According to the above ingredients, aluminum ingots and aluminum intermediate alloy ingots of corresponding weights are dispensed, and put into a melting furnace for melting at a melting temperature of 760°C and kept for 35 minutes. Then carry out sufficient stirring (stirring time 40min) and carry out hydrogen and impurity elimination treatment on the aluminum alloy melt with qualified composition.

[0034] (2) Casting: Control the temperature of the clean aluminum alloy melt obtained in the above steps at 745°C, and then quickly and uniformly cool it to 400°C through a water-cooled w...

Embodiment 2

[0040] An aluminum-magnesium alloy wire with better comprehensive performance for processing rivets, based on its total weight, includes the following components in mass percentages: Si 0.01wt%; Fe 0.15wt%; Mn0.07wt%; Mg 2.9 wt%; Cr 0.15wt%; V0.003wt%; Ti 0.025wt%; Be 0.00008wt%, the balance being Al and unavoidable impurities.

[0041] Its preparation method is as follows:

[0042] (1) Melting: According to the above ingredients, aluminum ingots and aluminum intermediate alloy ingots of corresponding weights are dispensed and put into a melting furnace for melting at a melting temperature of 750°C and kept for 60 minutes. Then carry out sufficient stirring (stirring time 30min) and carry out hydrogen and impurity elimination treatment on the aluminum alloy melt with qualified composition.

[0043] (2) Casting: Control the temperature of the clean aluminum alloy melt obtained in the above steps at 750°C, and then quickly and uniformly cool it to 420°C through a water-cooled whe...

Embodiment 3

[0049] An aluminum-magnesium alloy wire with better comprehensive performance for processing rivets, based on its total weight, includes the following components in mass percentages: Si 0.05wt%; Fe 0.15wt%; Mn0.20wt%; Mg 3.8 wt%; Cr 0.18wt%; V0.018wt%; Ti 0.035wt%; Be 0.0005wt%, the balance being Al and unavoidable impurities.

[0050] Its preparation method is as follows:

[0051] (1) Melting: According to the above ingredients, aluminum ingots and aluminum intermediate alloy ingots of corresponding weights are dispensed and put into a melting furnace for melting at a melting temperature of 775°C and kept for 40 minutes. Then carry out sufficient stirring (stirring time 50min) and carry out hydrogen and impurity elimination treatment on the aluminum alloy melt with qualified composition.

[0052] (2) Casting: Control the temperature of the clean aluminum alloy melt obtained in the above steps at 715°C, and then quickly and uniformly cool it to 380°C through a water-cooled wh...

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Abstract

The present invention relates to an aluminum magnesium alloy for a rivet. The aluminum magnesium alloy comprises the following compositions, by mass percent, 0.01wt%-0.05wt% of Si, 0.05wt%-0.15wt% of Fe, 0.03wt%-0.20wt% of Mn, 2.9wt%-3.9wt% of Mg, 0.05wt%-0.20wt% of Cr, 0.003wt%-0.020wt% of V, 0.008wt%-0.04wt% of Ti, 0.00005wt%-0.0005wt% of Be, and with the balance being Al. The present invention further provides a preparation method for an aluminum magnesium alloy wire for a rivet. The preparation method comprises the following steps: (1) smelting; (2) casting; (3) rolling; and (4) drawing and intermediate annealing: comprising non-finished product drawing and finished product drawing. During non-finished product drawing, intermediate annealing is needed every time the section compression rate of a material deforms by 40%-60%, and then drawing is performed. During finished product drawing, the section compression rate of the material is 10%-30%, and the aluminum magnesium alloy wire for the rivet can be obtained. Intermediate annealing comprises the following steps: firstly increasing the temperature of the drawn wire to 150-200°C, and performing heat preservation for 5-6 h; then increasing the temperature to 340-420°C at the speed of 50-100°C / h, performing heat preservation for 0.5-1 h, and then cooling to the room temperature.

Description

technical field [0001] The invention relates to the field of metal materials for rivets, in particular to a high-strength aluminum-magnesium alloy wire for rivets and a preparation method thereof. Background technique [0002] Aluminum alloy rivets are widely used in riveting of construction, automobile, aircraft, furniture and other products. At present, the cracking rate of the wire rod for processing aluminum alloy rivets is relatively high. For example, the cracking rate of the aluminum alloy rod used for the rivet of a railway wagon car body involved in CN104717870 B reaches 4.7%. The slightly better technology is complex and expensive, such as CN106544558 A provides a high-strength aluminum alloy rivet wire, the wire performance strength is higher, but the technology is complicated and expensive, especially to prepare aluminum master alloy particles in advance, it is difficult Promoted in practice. Therefore, how to use a simple and economical process to solve the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/047
CPCC22C1/026C22C1/03C22C21/08C22F1/047
Inventor 贾伟张桓缪思童张军孟博蔺亚强
Owner JIANGSU HENGTONG ELECTRICAL SPECIAL WIRE CO LTD