Aluminum die-cast components for vehicles

Abstract

Regarding aluminum die-cast components for vehicles, the goal is to reduce variations in composition while maintaining good elongation (ductility). [Solution] A die-cast aluminum component for vehicles is disclosed, which is formed from a material containing Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, and Sr, each within the following weight percent ranges: Cu = 1.5 to 3.5, Si = 9.6 to 11.0, Fe = 0.6 or less, Mg = 0.3 or less, Mn = 0.5 or less, Zn = 1.0 or less, Ni = 0.5 or less, Ti = 0.3 or less, Sn = 0.2 or less, Pb = 0.2 or less, and Sr = 0.015 to 0.020 or less, and to which chloride or fluoride is added.

Description

Technical Field

[0001] The present disclosure relates to an aluminum die-cast member for a vehicle.

Background Art

[0002] Regarding an aluminum alloy extruded material for an automobile body structure member, a technique using an aluminum (hereinafter abbreviated as Al) alloy having a specific composition is known for the purpose of ensuring high strength, ductility, and good bending workability.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the above-described conventional technology relates to an extruded material and can only be applied to side frames, rear frames, center pillars, side sills, floor frames, etc., which have relatively simple shapes among automobile body structure members. In addition, recycled aluminum materials such as recycled aluminum castings and recycled aluminum sash scraps for automobiles, which are used as materials, are considered to be difficult to obtain due to the expanding demand in the future, and the variation in their components is large, so it is difficult to adjust the components.

[0005] Therefore, on one side, the present disclosure aims to reduce component variations while providing good elongation (ductility) for an aluminum die-cast member for a vehicle.

Means for Solving the Problems

[0006] On one side, Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, Sr are within the following weight % ranges respectively Cu = 1.5 or more and 3.5 or less Si=9.6 or more and 11.0 or less Fe=0.6 or less Mg=0.3 or less Mn=0.5 or less Zn=1.0 or less Ni=0.5 or less Ti=0.3 or less Sn=0.2 or less Pb=0.2 or less Sr=0.015 or more and 0.020 or less An aluminum die-cast component for vehicles is provided, which is formed from a material containing and to which chloride or fluoride has been added. [Effects of the Invention]

[0007] In one respect, this disclosure makes it possible to reduce compositional variations while providing good elongation (ductility) to aluminum die-cast components for vehicles. [Brief explanation of the drawing]

[0008] [Figure 1] This table summarizes the composition and characteristics (elongation) of the aluminum die-cast components for vehicles in each embodiment. [Modes for carrying out the invention]

[0009] In the following explanation, chemical symbols may be used.

[0010] Figure 1 is a table summarizing the composition and properties (elongation) of aluminum die-cast components for vehicles according to Examples 1 to 3. As a comparative example, Figure 1 also shows the composition and properties of ADC12, a die-cast aluminum alloy.

[0011] As shown in Figure 1, the aluminum die-cast component for vehicles according to Example 1 contains Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, and Sr, each within the following weight percentage ranges: Cu=1.5 or more and 3.5 or less Si=9.6 or more and 11.0 or less Fe=0.6 or less Mg is 0.3 or less Mn is 0.5 or less Zn is 1.0 or less Ni is 0.5 or less Ti is 0.3 or less Sn is 0.2 or less Pb is 0.2 or less Sr is 0.015 or more and 0.020 or less and contains.

[0012] According to such a component composition, the test result is that the elongation is 6%, and an advantageous effect could be confirmed.

[0013] And, the aluminum die-cast member for a vehicle according to Example 1 further contains chlorides and fluorides as additives. Each of the chlorides and fluorides is optional. For example, the chloride may be sodium chloride, potassium chloride, etc. Also, the fluoride may be aluminum fluoride, etc. The addition amount of the additive is optional, but may be about 0.2%, for example. In a modified example, only one of the chloride and fluoride may be added.

[0014] By adding such additives, it becomes possible to suppress the variation in mechanical properties mainly by purifying impurities.

[0015] As shown in FIG. 1, the aluminum die-cast member for a vehicle according to Example 2 differs only in the weight % of Mg from Example 1, and the other components are the same including the additives. Specifically, as shown in FIG. 1, the aluminum die-cast member for a vehicle according to Example 2 contains Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, Sr within the following weight % ranges respectively, Cu is 1.5 or more and 3.5 or less Si is 9.6 or more and 11.0 or less Fe is 0.6 or less Mg is 0.1 or less Mn is 0.5 or less Zn is 1.0 or less Ni is 0.5 or less Ti is 0.3 or less Sn is 0.2 or less Pb=0.2 or less Sr=0.015 or more and 0.020 or less It includes.

[0016] With this component composition, the test results showed an elongation of 10%, confirming further advantageous effects. Also, similar to Example 1, by adding additives, it is possible to suppress variations in mechanical properties, mainly by purifying impurities.

[0017] As shown in Figure 1, the aluminum die-cast component for vehicles according to Example 3 differs from that of Example 1 only in the weight percentages of Mg and Mn; the other components, including additives, are the same. Specifically, as shown in Figure 1, the aluminum die-cast component for vehicles according to Example 3 contains Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, and Sr, each within the following weight percentage ranges: Cu=1.5 or more and 3.5 or less Si=9.6 or more and 11.0 or less Fe=0.6 or less Mg=0.1 or less Mn=0.2 or more and 0.3 or less Zn=1.0 or less Ni=0.5 or less Ti=0.3 or less Sn=0.2 or less Pb=0.2 or less Sr=0.015 or more and 0.020 or less It includes.

[0018] With this component composition, the test results showed an elongation of 12%, confirming further advantageous effects. Also, similar to Example 1, adding additives makes it possible to suppress variations in mechanical properties, mainly by purifying impurities.

[0019] Unlike extruded materials, the die-cast aluminum alloy according to this embodiment can be applied to complex-shaped automotive body structural components (e.g., front underbody, rear underbody, battery case). Furthermore, as described above, the die-cast aluminum alloy according to this embodiment exhibits good elongation, making it suitable for application in energy-absorbing materials to enhance vehicle collision performance, as well as in components that are temporarily enlarged in diameter for shrink-fitting or other processes (such as housings for rotating electrical machinery).

[0020] Furthermore, since the die-cast aluminum alloy according to this embodiment can be manufactured based on ADC12, the most widely distributed die-cast aluminum alloy in the world, stable supply is possible and adjustments are easy.

[0021] Although specific embodiments have been described in detail above, the patent is not limited to these specific embodiments, and various modifications and changes are possible within the scope described in the claims.

Claims

1. Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, Sr are each within the following weight percentage ranges. Cu=1.5 or more and 3.5 or less Si=9.6 or more and 11.0 or less Fe=0.6 or less Mg=0.3 or less Mn=0.5 or less Zn=1.0 or less Ni=0.5 or less Ti=0.3 or less Sn=0.2 or less Pb=0.2 or less Sr=0.015 or more and 0.020 or less A die-cast aluminum component for vehicles, formed from a material containing and to which chloride or fluoride has been added.

2. The aluminum die-cast component for vehicles according to claim 1, wherein the weight percentage of Mg is 0.1 or less.

3. The aluminum die-cast component for vehicles according to claim 1 or 2, wherein the weight percentage of Mn is in the range of 0.2 or more and 0.3 or less.

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