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High-strength silicon, magnesium, manganese-aluminum bar and preparation method thereof

A silicon-magnesium-manganese-aluminum alloy and high-strength technology is applied in the field of high-strength silicon-magnesium-manganese-aluminum alloy rods and their preparation, and can solve the problems of inability to meet the material strength requirements of high-end automotive aluminum alloy steering control arm materials.

Active Publication Date: 2014-04-16
JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extruded rods of this material currently produced in China have a tensile strength between 310-350Mpa, a non-proportional elongation strength of 260-320Mpa, and an elongation A of 8-12%, which cannot be achieved. High-end automobile aluminum alloy steering control arm material strength requires tensile strength ≥ 380Mpa, non-proportional elongation strength ≥ 360Mpa, elongation A ≥ 10%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: A high-strength silicon-magnesium-manganese-aluminum alloy rod, characterized in that the composition and weight percentage content are: Si-1.12%, Mg-0.73%, Mn-0.62%, Cu-0.048%, Cr-0.14 % , Ti-0.02%, Fe-0.15%, other impurities are 0.03%, and the balance is Al.

[0016] A preparation method of a high-strength silicon-magnesium-manganese-aluminum alloy bar is as follows:

[0017] (1). Melting and casting: first put AL into the furnace to melt, when heated to 741 ° C, add Si, Mg, Mn, Cu, Cr, Ti and Fe, and stir for 10 minutes to make the ingredients in the melt evenly mixed; stir After uniformity, the temperature of the melt is between 722°C, blowing argon to the melt and refining with powder spraying refining agent, the refining time is 25 minutes, the amount of powder spraying refining agent is 1.5 kg / ton of aluminum, and the refining agent is Sichuan blue 1# powder-spraying refining agent produced by De Hi-Tech Industrial Co., Ltd.; after refining, the me...

Embodiment 2

[0022] Embodiment 2: A high-strength silicon-magnesium-manganese-aluminum alloy rod, characterized in that the composition and weight percentage content are: Si-1.18%, Mg-0.81%, Mn-0.64%, Cu-0.066%, Cr-0.15 %, Ti-0.03%, Fe-0.16%, other impurities are 0.02%, and the balance is aluminum.

[0023] A preparation method of a high-strength silicon-magnesium-manganese-aluminum alloy bar is as follows:

[0024] (1). Melting and casting: first put AL into the furnace to melt, and when it is heated to 745°C, add Si, Mg, Mn, Cu, Cr, Ti and Fe, and stir for 12 minutes to mix the ingredients in the melt evenly; stir After uniformity, the temperature of the melt is 730°C. Refining is carried out by blowing argon to the melt and accompanied by powder spraying refining agent. The refining time is 27 minutes. The dosage of powder spraying refining agent is 1.7 kg / ton of aluminum. 1# powder spraying refining agent produced by Science and Technology Industry Co., Ltd.; after refining, the melt ...

Embodiment 3

[0028] Embodiment 3: A high-strength silicon-magnesium-manganese-aluminum alloy rod, characterized in that the composition and weight percentage content are: Si-1.22%, Mg-0.86%, Mn-0.68%, Cu-0.072%, Cr-0.17 %, Ti-0.04%, Fe-0.17%, other impurities are 0.02%, and the balance is aluminum.

[0029] A preparation method of a high-strength silicon-magnesium-manganese-aluminum alloy bar is as follows:

[0030](1). Melting and casting: first put AL into the furnace to melt, and when the temperature reaches 756°C, add Si, Mg, Mn, Cu, Cr, Ti and Fe, and stir for 15 minutes to mix the ingredients in the melt evenly; stir After uniformity, the temperature of the melt is 738°C. Refining is carried out by blowing argon to the melt and accompanied by powder spraying refining agent. The refining time is 30 minutes, and the dosage of powder spraying refining agent is 2 kg / ton of aluminum. 1# powder spraying refining agent produced by Science and Technology Industry Co., Ltd.; after refining, ...

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Abstract

The invention relates to a high-strength silicon, magnesium, manganese-aluminum bar and a preparation method thereof and belongs to the field of metal materials. The high-strength silicon, magnesium, manganese-aluminum bar comprises the following components in percentage by weight: 1.1-1.25% of Si, 0.7-0.9% of Mg, 0.6-0.7% of Mn, 0.045-0.08% of Cu, 0.13-0.18% of Cr, 0.02-0.04% of Ti, less than or equal to 0.3% of Fe, less than 0.05% of other impurities and the balance of aluminum. The preparation method comprises the following steps: founding, homogenizing of a cast bar, extrusion and heat treatment. According to the invention, the high-strength silicon, magnesium, manganese-aluminum bar has higher mechanical properties than common silicon and magnesium series aluminum alloy through controlling the composition formula and the processing technology. The mechanical properties of the high-strength silicon, magnesium, manganese-aluminum bar are as follows: the tensile strength is greater than or equal to 380 MPa, the specified non-proportional extension strength is greater than or equal to 360 MPa, and the ductility A is greater than or equal to 10%; the high-strength silicon, magnesium, manganese-aluminum bar meets the strength requirement of high-end automobile aluminium alloy steering control arm material and can replace the imported material.

Description

technical field [0001] The invention relates to a high-strength silicon-magnesium-manganese-aluminum alloy bar and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] With the lightweight design of automobiles, the use of aluminum alloys in automobiles has increased. Automobile control arms are an important component of automobile suspension systems. Because control arms are safety components, many control arms used to be made of relatively strong Forgings require stable performance and high strength. The aluminum alloy material usually used in automobile control arms is 6082 aluminum alloy in GB / T3190-2008. The main alloying elements added are Si: 0.7`1.3% by weight percentage; Mg: 0.6~1.2%; Mn: 0.4~1.0 %, is a typical silicon-magnesium-manganese-aluminum alloy. However, the extruded rods of this material currently produced in China have a tensile strength between 310-350Mpa, a non-proportional elongation strength of 260-...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22F1/043
Inventor 史俊强
Owner JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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