Wärmebehandlungsfreie Hochfeste und Hochzähe Aluminiumdruckgusslegierung, daraus Hergestelltes Produkt und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4782562

Anmeldetag

25. Oktober 2024

Veröffentlichung

8. Mai 2025

Rechtsraum

EP

IPC

C22C21/04, C22C1/02, C22C1/03

Abstract

The present disclosure relates to a heat-treatment-free high-strength and high-toughness die-cast aluminum alloy, an article prepared therefrom and a manufacturing method therefor. In addition to Al and inevitable impurity elements, the die-cast aluminum alloy comprises the following chemical components in percentage by mass: 6.5-9.5% of Si, 0.1-0.3% of Fe, 0.4-0.85% of Mn, 0.1-0.6% of Mg, 0.1-0.9% of Cu, 0.02-0.12% of Ti and 0.05-0.15% of Sb; and satisfies the following formulas: Fe+Mn ≥ 0.65%; and Mn/Fe = 2.0-6.6, wherein each element symbol is substituted with the content of the corresponding element in percentage by mass. The disclosure solves the problem of unstable elongation due to melt gas absorption caused by Sr modification in such heat-treatment-free die-cast alloys, enabling the aluminum alloy die-cast part to obtain a microstructure without obvious porosity and shrinkage defects throughout the interior, thereby ensuring a tensile strength of greater than 230 MPa, a yield strength of greater than 150 MPa, and an elongation of greater than 10% at various portions of the part.

Anmelder

Firma

BAOSHAN IRON & STEEL CO., LTD.

Land

🇨🇳 China

Fachgebiete