JP4526108B2 - Aluminum bronze - Google Patents

Description

【００１６】
表２に、耐食性を評価するため、表１の合金鋳塊を研磨し、室内に１８０日間放置した時の耐変色性の良否、鋳造性の良否、展延性の良否、及び青錆発生の有無を評価した結果を示す。
【００１７】
【表２】

【００１８】
上記表２の結果から明らかなように、本発明の実施例Ｎｏ．１〜６、９は良好な耐変色性、鋳造性、展延性、耐食性を有していることが分かる。
【００１９】
【発明の効果】
このように、製造又は製作された本発明によるアルミニウム青銅は、表面処理を施すことなく、アルミ金と呼ばれる美しい黄金色をいつまでも保持し続け、耐変色性、鋳造性、展延性、耐食性において、従来のアルミニウム青銅よりも優れており、鋳造品、展伸材などに好適な材料である。[0001]
[Industrial application fields]
The present invention relates to an aluminum bronze that can be used in a wide range such as a wrought material and a casting for the purpose of aesthetic appearance of a golden color.
[0002]
[Prior art]
Conventional Japanese Industrial Standard Aluminum Bronze can be used as a decorative element for chemical industrial parts, marine parts, mechanical parts, arts and crafts, jewelry, tableware, etc. due to its corrosion resistance, seawater resistance, and wear resistance. in use. Aluminum bronze has an aluminum content of 5% to 12% by weight and exhibits a beautiful golden color called aluminum gold.
[0003]
[Problems to be solved by the invention]
Conventional Japanese Industrial Standard aluminum bronze gradually discolored over time, losing metallic luster and detracting from aesthetics. Moreover, in order to prevent discoloration of the copper alloy, there are some which are manufactured by treating the surface, but rust is generated due to wear and scratches on the surface of the manufactured product, and the appearance is impaired.
An object of the present invention is to solve the above problems and to obtain a special aluminum bronze that can be used for a wrought material and an art decorative casting for the purpose of golden beauty.
[0004]
[Means for Solving the Problems]
In addition to aluminum (Al) 5-9%, nickel (Ni) 0.2-4%, chromium (Cr) 0.01-0.2% by mass %, the aluminum bronze of the present invention contains beryllium (Be ) Containing 0.0025 to 0.2%, titanium (Ti) 0.001 to 0.01%, germanium (Ge) 0.0025 to 0.2%, with the balance being copper (Cu) And inevitable impurities .
Further, the aluminum bronze of the present invention is composed of 5% to 9% aluminum (Al), 0.2% to 4% nickel (Ni), 0.01% to 0.2% chromium (Cr), and iron. It contains two or more of (Fe) 0.1 to 0.5%, beryllium (Be) 0.0025 to 0.2%, germanium (Ge) 0.0025 to 0.2%, and the balance is copper ( Cu) and inevitable impurities.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
When the aluminum bronze ingot of the present invention was mirror-polished and left in the room for 180 days, there was no discoloration, and no occurrence of blue rust or deterioration of metallic luster was observed. Further, even in the casting by a highly accurate lost wax manufacturing method, the castability was good, and a strip having a width of 150 mm and a thickness of 0.5 mm was possible, and the spreadability was also good.
[0006]
About the composition component of the aluminum bronze of this invention, the reason for limitation of the effect | action and addition amount is demonstrated.
[0007]
Al is a main element necessary to determine the color tone and strength of the golden color, and when the addition amount is less than 5%, the color tone of the golden color is lowered. On the other hand, if it exceeds 9%, workability is lowered.
[0008]
Ni is an element effective for improving the corrosion resistance. If the addition amount is less than 0.2%, the effect is not sufficient, while if it exceeds 4%, the discoloration resistance is lowered.
[0009]
Cr is an element that increases the corrosion resistance and tensile strength of the alloy. If the added amount is less than 0.01%, the effect is not sufficient, and if it exceeds 0.2%, a β phase is formed in the substrate and the corrosion resistance is lowered. To do. Moreover, the hot water flow at the time of casting worsens.
[0010]
Fe is an element that contributes to the refinement and strength of crystal grains. If the amount added is less than 0.1%, the effect is not sufficient. On the other hand, if added over 0.5%, the corrosion resistance decreases.
[0011]
Be has the effect of improving the corrosion resistance of the alloy and increasing the strength, but the effect is not sufficient when the addition amount is less than 0.0025%, whereas when the addition amount exceeds 0.2%, The grains become coarse, and the plastic workability and corrosion resistance decrease.
[0012]
Ti is an element that improves the corrosion resistance and cold workability of the alloy. If the amount added is less than 0.001%, the effect is not sufficient. On the other hand, if added over 0.01%, an intermetallic compound is formed on the substrate. Precipitates and decreases corrosion resistance and cold workability.
[0013]
Ge has the effect of improving corrosion resistance and discoloration resistance. However, if its added amount is less than 0.0025%, the effect is not sufficient. On the other hand, if its added amount exceeds 0.2%, castability deteriorates. To do.
[0014]
【Example】
Examples of the alloys of the present invention are shown in Table 1. In Table 1, no. Nos. 1-6 and 9 are invention alloys. 7, 8, and 10 are alloys of reference examples.
[0015]
[Table 1]

[0016]
In Table 2, to evaluate the corrosion resistance, the alloy ingots in Table 1 are polished, and when left in the room for 180 days, the discoloration resistance is good, the castability is good, the ductility is good, and the presence of blue rust is generated. The result of having evaluated is shown.
[0017]
[Table 2]

[0018]
As is clear from the results in Table 2 above, Example No. It can be seen that 1 to 6 and 9 have good discoloration resistance, castability, spreadability, and corrosion resistance.
[0019]
【The invention's effect】
Thus, the manufactured or manufactured aluminum bronze according to the present invention keeps a beautiful golden color called aluminum gold for a long time without any surface treatment, and has been conventionally used in discoloration resistance, castability, spreadability, and corrosion resistance. It is superior to aluminum bronze, and is a suitable material for castings and wrought materials.

Claims (2)

In addition to aluminum (Al) 5-9%, nickel (Ni) 0.2-4%, chromium (Cr) 0.01-0.2% by mass%, beryllium (Be) 0.0025-0. Aluminum containing 2% or more of 2%, titanium (Ti) 0.001 to 0.01%, germanium (Ge) 0.0025 to 0.2%, the balance being copper (Cu) and inevitable impurities bronze. In addition to aluminum (Al) 5-9%, nickel (Ni) 0.2-4%, chromium (Cr) 0.01-0.2% by mass%, iron (Fe) 0.1-0. Aluminum containing 2% or more of 5%, beryllium (Be) 0.0025 to 0.2%, germanium (Ge) 0.0025 to 0.2%, the balance being copper (Cu) and inevitable impurities bronze.