High-toughness and high-strength aluminum alloy hub for automobile and manufacturing method of high-toughness and high-strength aluminum alloy hub

Abstract

The invention provides a high-toughness and high-strength aluminum alloy hub for an automobile and a manufacturing method thereof, and relates to the technical field of automobile hub manufacturing. The aluminum alloy hub is prepared from the following components in percentage by mass: 3.3-4.8% of Si, 1.2-1.7% of Mg, 0.45-0.7% of Mn, 0.2-0.6% of V, 0.35-0.7% of Ti, 0.05-0.13% of Zr, 0.05-0.12% ofRE, and the balance of Al; RE is composed of Yb, Pr, Nd and Sc with the mass ratio being 1:(0.2 to 0.6):(0.3 to 0.8):(0.6 to 1.2). The manufacturing method comprises the steps of smelting, refining, casting, solid solution treatment, deep cold treatment, aging treatment and the like. The manufactured aluminum alloy hub is uniform and dense in structure, high in toughness, high in strength, good incorrosion resistance, high in dimensional stability, excellent in comprehensive performance and long in service life, and has great using prospects.

Description

technical field [0001] The invention relates to the technical field of automobile hub manufacturing, in particular to a high-toughness and high-strength aluminum alloy hub for automobiles and a manufacturing method thereof. Background technique [0002] The automobile industry is an important symbol of the development of industrial modernization. The rapid development and sharp increase in output of the automobile industry in China has made it a pillar industry of the economy. With the development of the world economy, people pay more and more attention to the three major issues of environmental protection, energy and safety, and these issues are closely related to the development of the automobile industry. In order to solve these problems, the core issue of the automobile industry in the modern world is how to achieve lightweight, low cost, high safety performance, low energy consumption, and environmental protection. In recent years, the automotive industry has designed ...

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Problems solved by technology

[0007] Chinese patent CN 102366828 B discloses a low-pressure casting method for aluminum alloy automobile wheels, which optimizes the low-pressure casting process parameters and heat treatment by optimizing the alloy composition design and adding appropriate content of Al-Ti-B-C refiner and rare earth modifier Parameters, so that the prepared automobile hub has a structure composed of fine and uniform a dendrites and fine and uniform worm-like or spherical silicon, which improves the performance of the aluminum alloy automobile hub, but its room temperature tensile strength and toughness are still low. Difficult to meet market requirements for high toughness and high strength of automotive aluminum alloy wheels

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