The invention discloses a high-strength 7-series aluminum alloy for an automobile anti-collision beam and the automobile anti-collision beam. The formation of ZnMg natural aging atomic clusters in the natural aging process of the 7-series aluminum alloy is effectively inhibited by adjusting aluminum bar alloy components and a heat treatment process. Natural aging clusters can hinder dislocation movement to cause strength increase, and meanwhile, part of strengthening phases can be slowly separated out to cause strength increase; and therefore, through inhibition, the hardness of the 7-series aluminum alloy in the natural aging process can be increased very slowly, the natural aging speed of the 7-series aluminum alloy is reduced, the parking effect is reduced, the situation that the hardness of the material is rapidly increased before aging is avoided, and meanwhile it can be guaranteed that the material reaches enough strength after aging. The formula of the adjusted alloy comprises less than or equal to 0.05% of Si, less than or equal to 0.15% of Fe, 0.2%-0.3% of Cu, 0.15%-0.20% of Mn, 1.4%-1.5% of Mg, less than or equal to 0.05% of Cr, 6.0%-6.3% of Zn, 0.15%-0.20% of Zr, 0.10%-0.15% of Sn, 0.05%-0.10% of In, 0.01%-0.03% of Ti, less than or equal to 0.05% of single impurities, less than or equal to 0.15% of total impurities and the balance Al.
本发明公开一种汽车防撞梁用高强7系铝合金及汽车防撞梁,通过调整铝棒合金成分及热处理工艺,有效抑制7系铝合金在自然时效过程中ZnMg自然时效原子团簇的形成。由于自然时效的团簇会阻碍位错运动导致强度升高,同时会缓慢析出部分强化相导致强度的上升;因而这种抑制能使得自然时效过程中7系铝合金的的硬度提升非常缓慢,降低7系铝合金的自然时效速度,减小停放效应,避免材料在是时效前硬度出现快速提升,同时又能保证材料在时效后达到足够强度。调整后的合金配方为:Si:≤0.05%,Fe:≤0.15%,Cu:0.2%~0.3%,Mn:0.15%~0.20%,Mg:1.4%~1.5%,Cr:≤0.05%,Zn:6.0%~6.3%,Zr:0.15%~0.20%,Sn:0.10%~0.15%,In:0.05%~0.10%,Ti:0.01%~0.03%,单个杂质≤0.05%,杂质合计≤0.15%,余量为Al。
High-strength 7-series aluminum alloy for automobile anti-collision beam and automobile anti-collision beam
一种汽车防撞梁用高强7系铝合金及汽车防撞梁
2021-09-14
Patent
Elektronische Ressource
Chinesisch
IPC: | C22C Legierungen , ALLOYS / B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING , Herstellen von Blechen, Metalldraht, -stangen, -rohren Metallprofilen oder Halbzeugen auf andere Weise als durch Walzen / B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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