JP-2026075843-A - Aluminum die-cast components for vehicles

Abstract

[Problem] To reduce variations in composition while providing good elongation (ductility) to aluminum die-cast components for vehicles. [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. [Selection Diagram] Figure 1

Inventors

• 深見 尚男
• 茜谷 宗明
• 安田 誠

Assignees

• 株式会社アイシン

Dates

Publication Date

20260511

Application Date

20241023

Claims (3)

1. An aluminum die-cast component for vehicles, formed from a material containing Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, and Sr within the following weight percent ranges: Cu = 1.5 to 3.5, Si = 9.6 to 11.0, Fe = 0.6, Mg = 0.3, Mn = 0.5, Zn = 1.0, Ni = 0.5, Ti = 0.3, Sn = 0.2, Pb = 0.2, and Sr = 0.015 to 0.020, and to which chloride or fluoride is 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 to 0.3.

Description

This disclosure relates to aluminum die-cast components for vehicles. Regarding aluminum alloy extruded materials for automotive body structural components, a technology is known that utilizes aluminum alloys (hereinafter abbreviated as aluminum) with a specific composition to ensure high strength, ductility, and good bendability. Japanese Patent Publication No. 2000-63972 This table summarizes the composition and characteristics (elongation) of the aluminum die-cast components for vehicles in each embodiment. In the following explanation, chemical symbols may be used. Figure 1 is a table summarizing the composition and properties (elongation) of aluminum die-cast components for vehicles according to Examples 1 to 3. Figure 1 also shows the composition and properties of ADC12, a die-cast aluminum alloy, as a comparative example. 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: Includes the following elements: 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. With this ingredient composition, the test results showed a 6% increase in elongation, confirming a favorable effect. Furthermore, the aluminum die-cast component for vehicles according to Example 1 further contains chloride and fluoride as additives. While the chloride and fluoride are optional, for example, the chloride may be sodium chloride or potassium chloride, and the fluoride may be aluminum fluoride. The amount of additive is optional, but for example, it may be around 0.2%. In the modified example, only one of chloride or fluoride may be added. Adding such additives primarily helps to suppress variations in mechanical properties by purifying impurities. As shown in Figure 1, the aluminum die-cast component for vehicles according to Example 2 differs from that of Example 1 only in the weight percentage of Mg; the other components, including additives, are the same. Specifically, as shown in Figure 1, the aluminum die-cast component for vehicles according to Example 2 contains Cu, Si, Fe, Mg, Mn, Zn, Ni, Ti, Sn, Pb, and Sr, each within the following weight percentage ranges: Includes the following elements: Cu = 1.5 to 3.5, Si = 9.6 to 11.0, Fe = 0.6 or less, Mg = 0.1 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. With this component composition, the test results showed an elongation of 10%, confirming further advantageous effects. Furthermore, similar to Example 1, adding additives allows for the suppression of variations in mechanical properties, primarily through the purification of impurities. 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: The following are included: Cu = 1.5 to 3.5, Si = 9.6 to 11.0, Fe = 0.6 or less, Mg = 0.1 or less, Mn = 0.2 to 0.3, 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. With this component composition, the test results showed an elongation of 12%, confirming further advantageous effects. Furthermore, similar to Example 1, adding additives allows for the suppression of variations in mechanical properties, primarily through the purification of impurities. 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, and for components that are temporarily enlarged in diameter for shrink-fitting (such as housings for rotating electrical machinery). 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 worldwide, stable supply is possible and adjustments are easy. While specific embodiments have been described in detail above, the patent is not limited to these embodiments, and various modifications and changes are possible within the scope of the claims.