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6XXX aluminium alloy extruded forging stock and method of manufacturing thereof

An aluminum forging and aluminum alloy technology, which is applied in the field of 6xxx aluminum alloy extrusion forging raw materials, can solve the problems of no fibrous metal structure, the tensile strength of the extruded material is not significantly improved, and recrystallization is easy to occur.

Inactive Publication Date: 2020-08-14
CONSTELLIUM EXTRUSIONS DECIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] The chemical composition is suggested to have an Fe content of 0.1 to 0.5%, preferably in the range of 0.2 to 0.3%, and an extrusion ratio of 15 to 25, presumably if less than 15, the extruded material does not have sufficient fibrous metal structure (in The crystalline particles precipitated in this structure become finer and are modified), and recrystallization easily occurs in this extruded material, which leads to no significant increase in the tensile strength of the extruded material

Method used

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  • 6XXX aluminium alloy extruded forging stock and method of manufacturing thereof
  • 6XXX aluminium alloy extruded forging stock and method of manufacturing thereof
  • 6XXX aluminium alloy extruded forging stock and method of manufacturing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0205] Two billets with a diameter of 368 mm have been cast, the composition of which corresponds to alloy C according to the invention (see Table 1).

[0206] Table 1 - Composition (in weight %)

[0207] Si Fe Cu mn Mg Cr Zn Ti V Zr C this invention 1.3 0.12 0.07 0.8 0.9 0.16 ≤0.05 ≤0.05 ≤0.05 ≤0.05

[0208] The as-cast billets were subsequently homogenized at a temperature of 500° C. for 4 hours.

[0209] The homogenized strands were heated to 515 °C and formed into rods with a diameter of 45 mm using a 3-cavity die (extrusion ratio 21.7) or 45 mm in diameter using a 5-cavity die (extrusion ratio 21.7). than 13.4). The extruded rod coming out of the extruder is quenched with water.

[0210] The bar supplied in the quenched state is then subjected to 2 rolling steps followed by standard forging operations in several forging steps with intermediate heat treatment (typically at temperatures above 500°C) to prepare Type H with...

Embodiment 2

[0214] In this example, three alloys E, F, G were cast into billets with a diameter of 360 mm. The compositions of these alloys are listed in Table 3. The billets were homogenized for 5 hours at a temperature (MT) of 500°C. The billets were heated to 515°C and extruded on an indirect extruder to form rods with different diameters formed by varying the die diameter and number of cavities to produce different extrusion ratios as given in Table 3. The extruded rods were extruded from the extruder at an extrusion speed of 6-8 m / min and quenched with water.

[0215] Table 3 - Composition (in % by weight)

[0216] Id. Si Fe Cu mn Mg Cr Ti Zr Extrusion ratio E 1.2 0.11 0.07 0.7 0.8 0.18 0.03 0.04 13 F 1.2 0.12 0.07 0.8 0.8 0.18 0.03 0.04 18.3 G 1.2 0.13 0.08 0.8 0.9 0.19 0.03 0.04 21.8

[0217] The microstructure of the extruded alloy was analyzed using OIM to determine the fraction of the main texture components...

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Abstract

The invention concerns an aluminum extruded product as feedstock for forging comprising in weight percent Si: 0.6 % to 1.4 %, Fe: 0.01 % to 0.15 %, Cu: 0.05 % to 0.60 %, Mn: 0.4 % to 1 %, Mg: 0.4 % to1.2 %, Cr: 0.05 % to 0.25 %, Zn < 0.2 %, Ti <= 0.1 %, Zr <= 0.05 %, the rest being aluminium and unavoidable impurities having a content of less than 0.05% each, total being less than 0.15%, whereinthe number density of Mn containing dispersed particles is at least equal to 2.5 particles per [mu]m2, preferably 3.0 particles per [mu]m. The invention also concerns the process to obtain the aluminum extruded product as feedstock for forging.

Description

technical field [0001] The present invention relates to a 6xxx aluminum alloy extruded forging stock which allows forging a structural material with a good balance between strength, ductility and fatigue properties. The invention also relates to forged products for motor vehicle applications, wherein extruded rods are used as raw material. The invention also relates to methods of making such 6xxx aluminum extrusion forging stock. Background technique [0002] There is an increasing need to reduce the weight of motor vehicles in order to integrate more safety components while reducing CO2 emissions. As a result, motor vehicle manufacturers are searching for structural materials that provide the best balance of strength, ductility and weight. In particular, suspension arms are promising components to meet this need. [0003] Aluminum forgings are often used due to their low density and high strength. Aluminum forgings are of particular interest for suspension arms, specifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02B21C23/00C22C21/04C22C21/08C22F1/043C22F1/047C22F1/05B21J5/00
CPCC22C21/02C22C21/04C22C21/08C22F1/043C22F1/047C22F1/05B21C23/002B21J1/06B21J5/002B21J5/008B21J5/02
Inventor C·达丰塞卡巴尔巴蒂I·科拉里克M·巴约库拉
Owner CONSTELLIUM EXTRUSIONS DECIN