High strength aluminum copper alloy vehicle wheel material and liquid forging forming method

Abstract

The invention relates to a high strength aluminum copper alloy vehicle wheel material and a liquid forging forming method. The material comprises following components by weight percent: 4.5-5.5% of Cu, 0.3-0.5% of Mn, 0.15-0.35% of Ti, 0.05-0.3% of V, 0.05-0.2% of Zr, 0.005-0.06% of B, 0.01-0.3% of Cd, 0.01-0.2% of Nd, 0.01-0.1% of Er, and the balance of Al. The aluminum copper alloy vehicle wheel prepared by the liquid forging forming method has good comprehensive chemical property and high product percent of pass, has the tensile strength greater than 400MPa, the yield strength greater than 300MPa, and the elongation greater than 10%, thus meeting the technical requirement of heavy load automobiles; particularly, due to the addition of a small quantity of rare earth element Er in the alloy formula, the aluminum copper alloy material structure is further refined, and the comprehensive property of the product is obviously improved; in addition, due to the addition of rare earth element Nd and grain refined elements like Ti, Zr and B, hot crack of the aluminum copper alloy is effectively avoided in solidifying, and the percent of pass of the vehicle wheel prepared by the liquid forging forming method is sharply improved.

Description

technical field [0001] The invention belongs to the field of automobile wheel materials and processing, and relates to the preparation technology of aluminum-copper alloy wheels, in particular to a high-strength aluminum-copper alloy wheel material and a liquid die forging forming method. Background technique [0002] Aluminum alloy wheels have the advantages of light weight, small rotational inertia, and fast heat dissipation. They have a good effect on automobile energy saving, reducing exhaust emissions, reducing tire burst accidents, and improving automobile safety. They are widely used in the car industry. However, heavy-duty vehicles such as trucks and buses have heavy loads and high safety requirements, and ordinary cast aluminum alloy wheels cannot meet the requirements. At present, commercial heavy-duty vehicles in developed countries and regions such as Europe and the United States generally use forged aluminum alloy wheels, with a market share of more than 40%, an...

AI Technical Summary

Problems solved by technology

However, high-strength cast aluminum-copper alloys have disadvantages such as poor plasticity, high thermal cracking tendency, and poor casting fluidity, and are limited to sand castings in most cases.

[0005] Through the search, the product and preparation process of aluminum-copper alloy were found, but no patent documents were found for die forging or even liquid die forging to make wheels.