Aluminum alloy welded member

A technology for joining parts and aluminum alloys, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., can solve problems such as large changes, uneven dispersion of second phase particles, poor color tone of the coating, etc., to achieve Effects of preventing color tone difference, suppressing uneven dispersion, and eliminating color tone difference

Active Publication Date: 2012-12-05
SUMITOMO LIGHT METAL INDS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, when comparing and studying the portion corresponding to the joint portion (hereinafter referred to as “the portion corresponding to the joint portion”) and other portions of the design surface where the coating is formed, it was found that in the portion corresponding to the joint portion, Inhomogeneously dispersed second phase particles including coarse second phase particles
That is, it is considered that the non-uniformly dispersed second-phase particles in such a portion corresponding to the joint portion cause a large change in the formation of pits due to etching, thus forming a poor color tone of the film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Therefore, as described below, the effects of the invention of the present application were confirmed.

[0026] First, as the aluminum alloy material, two types of 5000-series aluminum alloys whose Si or Fe content is near the upper limit among the Si and Fe forming the second phase particles are used as the present invention material 1, the present invention material 2, or the present invention material 3. . Two 5052 materials whose Si or Fe contents slightly exceeded the upper limit were used as 5052 material 1 or 5052 material 2, and were used as comparative examples of materials 1, 2 or 3 of the present invention.

[0027] In addition, the chemical composition of the material of the present invention and the 5052 material is shown in Table 1.

[0028] The test material of the material of the present invention and the 5052 material of the comparative example is made into an ingot by semi-continuous casting, and then the plate thickness is 2.5mm through homogenizatio...

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PUM

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Abstract

An aluminum alloy material for an aluminum alloy welded member, which is obtained by forming a welded portion by means of friction stir welding, is formed to contain 0.3-6.0% by mass of Mg, 0.2% by mass or less of Cu, 0.1% by mass or less of Si and 0.1% by mass or less of Fe, with the balance made up of Al and unavoidable impurities, and secondary phase particles dispersed in the aluminum alloy are made to have a particle diameter of 5 [mu]m or less when observed with an optical microscope. Consequently, the secondary phase particles in a portion corresponding to the welded portion of the aluminum alloy welded member are uniformly dispersed even in comparison to the other portions, so that change in the formation of pits by etching is reduced and problem of color tone difference in an anodic oxide coating film can be solved.

Description

technical field [0001] The invention of the present application relates to an aluminum alloy joining part, which is used in the manufacture of a vehicle wheel and a housing. The vehicle wheel and the housing are formed by joining the ends of aluminum alloy materials into one body through friction stir welding. It is coated by anodizing treatment. Background technique [0002] Conventionally, in the manufacture of vehicle wheels and housings, aluminum alloy joint members have been used in the manufacture in view of their light weight. For example, in the manufacture of a wheel, a plate-shaped aluminum alloy material is made into a cylinder, the ends are butted, and the ends are joined together by friction stir welding to form a cylinder. Furthermore, it molded into a product by flaring both ends. Then, the surface opposite to the joining portion is used as a design surface, and a coating is formed by anodic oxidation treatment in order to improve the corrosion resistance an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12C22C21/00C22C21/06C25D11/04
CPCC25D11/04B23K20/122C22C21/06C22C21/00B23K20/2336B23K2203/10B23K2103/10Y10T428/24802B23K20/12C22C21/08
Inventor 小关好和福田敏彦加藤健志
Owner SUMITOMO LIGHT METAL INDS LTD
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