Method for manufacturing magnesium alloy product

A manufacturing method and technology of magnesium alloys, which are applied in the direction of surface coating liquid devices, coatings, and pre-treated surfaces, etc., can solve problems such as inability to coat coatings, and achieve the effect of improving yield and corrosion resistance

Inactive Publication Date: 2016-08-17
JCU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] When the coating is applied to the magnesium alloy in this way, there is a problem that the coating cannot be smoothly applied due to the influence of the mold release agent, the polishing liquid adhering to the operation such as grinding, fingerprints and other oils, and the hydrogen adsorption of magnesium itself.

Method used

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  • Method for manufacturing magnesium alloy product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Coating applied to magnesium alloy material: A flat test piece (25×50 mm) was prepared from a thixoformed magnesium alloy AZ91D (containing 9% aluminum and 1% zinc). It should be noted that during thixoforming, a mold release agent (polysiloxane-based) is pre-coated on the mold. The test pieces were treated under the conditions in Table 1 to obtain magnesium alloy products. It should be noted that the order of treatment is the order of alkali degreasing treatment, heat treatment, and coating treatment.

[0051] Table 1

[0052] No.

[0053]

[0054] The test piece was dipped in SK18 (manufactured by Jaciu Corporation) set at 60° C. for 5 minutes.

[0055]

[0056] Using an electric furnace, the test piece was heated at the temperature described in Table 1 under atmospheric pressure for 60 minutes. Then let cool to room temperature.

[0057]

[0058] An acrylic resin-containing polysiloxane-based paint (curing temperature: 160° C.) composed of the fol...

Embodiment 2

[0069] Coating applied to magnesium alloy material: A flat test piece (25×50 mm) was produced from a rolled magnesium alloy AZ31B (containing 3% aluminum and 1% zinc). This test piece was treated under the conditions in Table 3 below to obtain a magnesium alloy product. It should be noted that the conditions for the alkali degreasing treatment, heat treatment, and coating treatment were the same as in Example 1. For the order of treatment, Nos. In order, No. 12 is the order of heat treatment, alkali degreasing treatment, and coating treatment.

[0070] table 3

[0071] No.

[0072] Regarding the test piece obtained above, the same film thickness calculation, 100-grid test and pencil hardness test as in Example 1 were performed. These results are shown in Table 4.

[0073] Table 4

[0074] No.

[0075] Regarding the magnesium alloy material of the rolling material having a composition different from that of Example 1, since the adhesiveness between the p...

Embodiment 3

[0077] Corrosion resistance test: Magnesium alloy products (No.15 and 16) identical to No.4 or No.5 in Example 1 were made from magnesium alloy AZ91D, and the same as No.12 in Example 2 were made from magnesium alloy AZ31B According to the old JIS L0848 test method, these products were immersed in artificial sweat set at 40°C, and after a predetermined period of time, the presence or absence of pitting corrosion was visually checked. In addition, as a comparison, magnesium alloy products (No. 14 (AZ91D), No. 17 to 18 (AZ31B)) were prepared except that no heat treatment was performed or the temperature of the heat treatment was 160° C., and these products were used to Make the same confirmation. These results are shown in Table 5.

[0078] table 5

[0079] No.

[0080] From the above results, it can be known that the corrosion resistance of magnesium alloy products is improved by heat treatment of both magnesium alloys AZ91D and AZ31B. It can also be seen that for ...

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Abstract

The present invention is a method for manufacturing a magnesium alloy product in which a magnesium alloy material is coated by a coating material, characterized in that the magnesium alloy material is heat-treated at 200 DEG C or greater prior to the magnesium alloy material being coated by the coating material, thereby solving a problem that when a magnesium alloy is coated with a coating material, the coating material could not be well-coated due to mold release agents, the effect of oils and the like such as grinding fluids and fingerprints clinging to the magnesium alloy during work such as polishing, and due to hydrogen-absorbing properties of magnesium.

Description

technical field [0001] The invention relates to a manufacturing method of a magnesium alloy product in which a paint is applied to a magnesium alloy material. Background technique [0002] Magnesium alloy is an alloy mainly composed of magnesium, and is used in many electronic equipment casings because of its light weight, high electromagnetic wave blocking ability, and excellent recyclability. [0003] The shell of the magnesium alloy is mainly a shell made of rolled material and a shell formed by a casting method. The cast magnesium alloy needs to be coated with paint because of its poor corrosion resistance. [0004] However, in the magnesium alloy after casting, the mold release agent (polysiloxane type, mineral oil type, grease / ester type, wax type) sprayed on the mold for easy removal of the product from the mold will remain, because it will affect the Corrosion resistance, coating film adhesion, so pretreatment to remove this release agent is essential. (Non-Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D29/00B05D3/02B05D7/14B22D17/00C22C23/02C22F1/00C22F1/06
CPCB05D3/0218B05D2202/20B22D17/007B22D21/007C22C23/02C22F1/06B22D29/00
Inventor 锅岛三弘堀江邦明木村隆男下田胜己三木明夫
Owner JCU CORP
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