Effect of temperature uniformity of natural gas-fired heat treatment furnaces on mechanical properties of aluminum alloy wheel hub

doi:10.13251/j.issn.0254-6051.2023.08.029

Abstract

Abstract: For the natural gas heat treatment furnace of the newly built automobile aluminum wheel hub plant overseas, considering the influence of furnace temperature uniformity, the process verification of heat treatment of aluminum alloy wheel hub was carried out. Before and after the optimization of the furnace temperature uniformity, the mechanical properties and microstructure of the aluminum alloy wheel hub were tested respectively. The results show that the elongation after fracture of the wheel hub on A layer closing to the nozzle is relatively lower, and coarsening of Al-Si eutectic particles appears in the microstructure. The wheel hub on the bottom layer C, compared with that on the top A layer and the B layer in the middle, has the worst mechanical properties and insufficient spheroidization of the Al-Si eutectic. After optimizing the temperature uniformity of the furnace, there is no obvious difference in the specimens on each layer according to the mechanical properties and microstructure test, which can meet the technical requirements of the product.

Key words: A356.2 aluminum alloy wheel hub, natural gas-fired heat treatment furnace, furnace temperature uniformity, process validation

CLC Number:

TG156.1

Zhang Yanxin, Ala Teng, Zhao Lei, Li Jiaxiao, Zhou Zhe, Lü Jinqi. Effect of temperature uniformity of natural gas-fired heat treatment furnaces on mechanical properties of aluminum alloy wheel hub[J]. Heat Treatment of Metals, 2023, 48(8): 179-184.

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