The invention relates to a forged aluminum alloy part and a manufacturing method and application thereof.The manufacturing method comprises the steps that a forged aluminum alloy part semi-finished product is prepared, and the forged aluminum alloy part semi-finished product comprises, by mass, 1.0%-1.2% of Si, 0.9%-1.0% of Mg, 0.5%-1.0% of Cu, 0.6%-0.9% of Mn, 0.2%-0.6% of Cr, smaller than or equal to 0.2% of Fe, smaller than or equal to 0.05% of Zn, smaller than or equal to 0.1% of Ti, smaller than or equal to 0.1% of Zr, smaller than or equal to 0.1% of Sc and the balance Al and inevitable impurities; and the forged aluminum alloy part semi-finished product is subjected to heat treatment, and the forged aluminum alloy part is obtained. The heat treatment comprises solid solution, first-stage artificial aging and second-stage artificial aging which are sequentially carried out, and the treatment temperature of the first-stage artificial aging is lower than that of the second-stage artificial aging. According to the aluminum alloy forging scheme, optimization and control are conducted on the two aspects of components and heat treatment of the aluminum alloy forging part, so that it is ensured that the aluminum alloy forging part obtains the performance that the tensile strength is larger than 370 MPa, the percentage elongation after fracture is larger than 10% and the fatigue strength is higher than 140 MPa, and the requirements for high strength and high toughness of commercial vehicle parts are met.
本申请涉及一种锻造铝合金零件、制造方法及应用,包括:制备锻造铝合金零件半成品,按照质量分数计算,锻造铝合金零件半成品包括:Si:1.0~1.2%,Mg:0.9~1.0%,Cu:0.5~1.0%,Mn:0.6~0.9%,Cr:0.2~0.6%,Fe:≤0.2%,Zn:≤0.05%,Ti:≤0.1%,Zr:≤0.1%,Sc:≤0.1%,余量为Al和不可避免的杂质;对锻造铝合金零件半成品进行热处理,即得锻造铝合金零件;热处理包括依次进行的固溶、第一级人工时效和第二级人工时效,且第一级人工时效的处理温度小于第二级人工时效的处理温度。本申请采用锻造铝合金方案,针对锻造铝合金零件成分和热处理两个方面进行了优化与控制,以确保锻造铝合金零件获得抗拉强度大于370MPa,断后伸长率大于10%,疲劳强度高于140MPa的性能,满足商用车零件高强高韧的要求。
Forged aluminum alloy part, manufacturing method and application
一种锻造铝合金零件、制造方法及应用
2023-08-18
Patent
Electronic Resource
Chinese
IPC: | C22C Legierungen , ALLOYS / B60B VEHICLE WHEELS , Räder für Fahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / 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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