Provided is, as a material for an automotive door beam, a 7000-series aluminum alloy extruded material having excellent SCC resistance in a higher strength range (proof stress of 460 MPa or greater) than ever before. The 7000-series aluminum alloy extruded material comprises 7.5-9.0 mass% of Zn; 1.3-2.0 mass% of Mg; 0.1-0.7 mass% of Cu; at most 0.15 mass% of Si; at most 0.3 mass% of Fe; 0.005-0.2 mass% of Ti; 0.1-0.5 mass% of at least one among Mn, Cr, and Zr within a range, wherein Mn is 0.3 mass% or less, Cr is 0.25 mass% or less, and Zr is 0.25 mass% or less; and the remainder consisting of Al and impurities. A Fe-based crystallized substance is contained, and the average Cu content thereof is 5.0 mass% or less.
提供一种7000系铝合金挤压材,作为汽车的车门防撞梁的原材,其在比以往更高的强度区域(屈服强度460MPa以上)具备优异的耐SCC性。7000系铝合金挤压材,含有Zn:7.5~9.0质量%、Mg:1.3~2.0质量%、Cu:0.1~0.7质量%、Si:0.15质量%以下、Fe:0.3质量%以下、Ti:0.005~0.2质量%,还在Mn:0.3质量%以下、Cr:0.25质量%以下、Zr:0.25质量%以下的范围内含有Mn、Cr、Zr的1种以上0.1~0.5质量%,余量是Al和杂质,含有Fe系晶化物,其平均Cu含量为5.0质量%以下。
AUTOMOTIVE DOOR BEAM MADE OF ALUMINUM ALLOY EXTRUDED MATERIAL
由铝合金挤压材形成的汽车的车门防撞梁
2021-11-05
Patent
Electronic Resource
Chinese
IPC: | C22C Legierungen , ALLOYS / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen |
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