Aluminum alloy plate for formation processing and manufacturing method thereof

An aluminum alloy plate, forming technology, applied in the field of Al-Mg-Si alloy plate, can solve the problems of insufficient alloy plate, difficult to manufacture, poor appearance, etc., and achieve the effect of high productivity

Inactive Publication Date: 2012-10-17
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in Patent Document 2, because the finishing temperature of hot rolling is limited to a high level, it is difficult to perform stable production, and in Patent Document 5, because the speed of hot finishing rolling is suppressed, scratches are likely to occur on the surface, and there are improvements in various manufacturing conditions. room
In addition, if the panel structure is increased in size and shape, or the press working conditions are severe due to thinning, etc., appearance defects such as wrinkles are more likely to occur, and the Al-Mg-Si alloy sheets of Patent Documents 2 to 6 are not full

Method used

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  • Aluminum alloy plate for formation processing and manufacturing method thereof
  • Aluminum alloy plate for formation processing and manufacturing method thereof
  • Aluminum alloy plate for formation processing and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] [Production of test materials]

[0080] (casting~homogenization heat treatment)

[0081] An aluminum alloy having a composition shown in Table 1 was melted, and an ingot having a thickness of 600 mm was produced by a semi-continuous casting method. Homogenization was performed by maintaining a heat treatment temperature of 550° C. for 5 hours, followed by cooling to room temperature, and end face milling treatment was performed.

[0082] (hot rolling~cold rolling)

[0083] Next, the ingot was preliminarily heated, and hot rolling (rough rolling, finish rolling) was performed at a starting temperature of 400° C. to obtain a hot-rolled sheet having a thickness of 4.0 mm. In the rough rolling, the plate thickness is 80 mm, and the next pass reaches a plate thickness of 40 mm (50% rolling reduction). In addition, the plate thickness before the final pass of hot rolling (finish rolling) was set to 8 mm, formed into a hot-rolled plate with a plate thickness of 4.0 mm at a ...

Embodiment 2

[0109] Using the same aluminum alloy composition as the test material Nos. 1, 5, 7, and 14 of the above-mentioned Example 1, a test material in which the conditions of the final pass of hot rolling were changed was produced, and it was carried out in the same manner as in Example 1. evaluate.

[0110] [Production of test materials]

[0111] (casting~homogenization heat treatment)

[0112] For an aluminum alloy having the composition shown in Table 2 (as the alloy No., the test material No. of Example 1 is shown), in the same manner as in Example 1, an ingot with a thickness of 600 mm was produced and homogenized at 550°C for 5 hours. Heat treatment, face milling treatment. However, the homogenization heat treatment of 480 degreeC x 9 hours was implemented about test material No. 33, and the homogenization heat treatment of 600 degreeC x 2 hours was implemented about test material No. 34.

[0113] (hot rolled)

[0114] Next, the ingot was preliminarily heated and hot-rolled...

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Abstract

The invention provides an Al-Mg-Si system alloy plate and a manufacturing method thereof. The alloy plate which has formation performances and great strengths will not suffer bad appearance after being coated. The aluminum alloy plate comprises 0.4-1.5% of Si, 0.4-1.0% of Mg, 0.1-10.%of Fe, 0.1-0.5% of Mn and the balance being the Aluminum and inevitable foreign matters. The aluminum alloy plate is manufactured in the steps of performing casting and homogenizing heat processing on aluminum alloys with a starting temperature ranging from 350 degrees to 450 degrees, and performing hot rolling, cold rolling, solid solution and quenching processing with the finishing temperature reaching more than (445-3r) degrees relative to the rolling reduction ratio r% of the final Gate. Furthermore, the area rate is more than 0.4% and the number density is over 1350 pieces/mm2 in the AL-mN-Fe-(Si) system intermetallic compound having a more than 2.0-mu m diameter and a plate thickness direction central part of the cross section along the rolling direction.

Description

technical field [0001] The present invention relates to an Al-Mg-Si alloy sheet formed into an automobile panel or the like by press working, and particularly relates to an aluminum alloy sheet excellent in surface properties and a method for producing the same. Background technique [0002] In recent years, in order to improve the fuel efficiency of automobiles, aluminum materials, which are lightweight and have excellent formability and bake hardenability, have been increasingly used in automotive components instead of the conventionally used steel materials. [0003] Among automotive members, high-strength JIS 5000 and 6000-series aluminum alloy materials are examples of aluminum materials suitable for structures such as outer panels and inner panels. In particular, Al-Mg-Si alloy materials such as the 6000 series have excellent age-hardening ability, so formability is ensured by low yield strength during stamping and bending. On the other hand, they have bake-hardening p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043
CPCC22C21/02C22C21/08C22F1/05
Inventor 中村贵彦增田哲也金田大辅
Owner KOBE STEEL LTD
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