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This research establishes a suitable casting model for magnesium alloy wheel. The casting of the wheel is an element that must be considered in the design of the wheel. Casting is an important basic process and technology in the field of machinery which is widely used in production, transportation, national defense, social life and other aspects. Computer numerical simulation of the casting process can shorten the product manufacturing cycle, reduce product costs, reduce casting defects and ensure product quality. The casting material in this study is AZ91 magnesium alloy used for wheel lightweight.

Lightweight research of automobile is a significant trend, and people are paying attention to the lightweight design of automobiles. Higher requirement was proposed on design and casting performance of the wheel which is an important part of lightweighting vehicle. In order to achieve better quality, the parametric studies of alloy wheel and casting are necessary. This research designs a new model of automobile wheel, to ensure energy efficiency, the wheels must be as lightweight as possible, using magnesium alloy material for lightweight.

Analysis of casting process is a very complex issue. This research based on finite element theory and actual production, designed reasonable casting model, instant filling and solidification data were obtained. Aiming at reducing casting defects, process improvement of casting riser structure was designed. On the basis of the foundation, it has important guiding significance for actual foundry production.

This research establish a suitable casting model for magnesium alloy wheel. Aiming at reducing casting defects, process improvement of casting riser structure were designed.

The Lockheed scandal was exposed during the 4 February 1976 hearings of the Sub-Committee on Multinational Corporations of the United States Senate Committee on Foreign Relations. These hearings revealed that Lockheed Aircraft Corporation paid illegal payments in several countries including Japan to promote the sale of its planes to prevent bankruptcy. The Securities Exchange Commission obtained documents showing that Lockheed paid more than US$10 million to Yoshio Kodama, a “fixer” and Lockheed's secret representative, and the Marubeni Corporation, which was Lockheed's agent in Japan since 1959. During the same hearings on 6 February, A. Carl Kotchian, vice president of Lockheed, informed the committee that a senior Japanese government official received US$2 million from Marubeni and that his company relied on Kenji Osano, a close associate of former Prime Minister Kakuei Tanaka, as an intermediary in its efforts to sell 21 Lockheed's L-1001 Tristar airbuses to All Nippon Airways (ANA) (Macdougall, 1988, pp. 193–195).