pumas shoes Aluminum-magnesium casting alloy on th

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Aluminum-magnesium casting alloy on the application in the automotive parts

170 ℃ × 16h as an internal quality materials to ensure that a larger elongation, due to the unique micro-crystal casting, magnesium material to maintain a high PFD QU eye strength, tensile strength and hardness. Because the available treatment (T4 or I \In addition + magnesium alloy fatigue limit (AZ91HP about 93Mpa). Different magnesium and aluminum, fatigue strength and life are particularly vulnerable to the surface and internal defects significantly affected, so the PFD-~ OD material 44 ~ compared to the former is not easy to produce fatigue cracks. High reliability, suitable for security items. (2) magnesium die casting mode automatically when the melting and casting process integration of the hot chamber die casting system does not require automatic pouring. However, only 300 to 600-ton die casting machine, and can not be pressurized, so it applies only to a more uniform wall thickness of small castings. In order to mass production of thin-walled, large castings of complex shape, had to use cold chamber die casting machine. In order to prevent oxidation of magnesium in the casting and burning + generated when the aluminum die casting can not be used when the ladle way, it is necessary to use the automatic casting of magnesium-specific manner. Previously developed forms of magnesium prepared by way of automatic pouring piston, pressure, impeller, electromagnetic pump, etc.) + but the durability of these methods, life, quantitative casting, equipment maintenance,[link widoczny dla zalogowanych], cost and other issues but have not been applied. Recently NORSKHYDRO Company (Norway) successfully developed an automatic use of siphon pouring device. Principle very simple, cheap and very accurate quantitative casting, precision up to ± 1. In addition, the amount of casting, casting speed can follow the casting diameter and metal pressure head (AH) freedom of choice. The company has announced several practical situation. Automatic pouring siphon device has been used for non-porous nature of die cast magnesium wheels, and use the existing cold chamber aluminum die-casting machine used in production. (3) high-quality magnesium Recycling Law (Fluxless ~) production of magnesium castings, how to effectively recycle waste and to ensure the quality,[link widoczny dla zalogowanych], in terms of cost and quality management point of view, are very to. Regeneration method in the past melting and refining aid presume the use of chloride flux class, highly residual chlorine metallic elements, which greatly reduces the corrosion resistance of magnesium alloy (casting allows the amount of chlorine is 10 ~ 20PPm). To make extensive use of magnesium alloy parts, the car should be considered economically from waste, high quality makes magnesium recycling. Recently, the development of flux can not use tablets are similar to the new high cleanliness, high-grade, high-quality magnesium metal block regeneration, have been recovered as a casting material and waste treatment technology applications (SF6 gas medium vacuum filtration ), looking forward to the future for the industry. 3. Mass die-casting magnesium wheels (1) two-wheelers (no holes of die-casting) had early use of magnesium racing wheels. However, previously used sand production, is difficult to mass production, high prices, the quality of reliability problems. Manufactured by casting method is the production Tsui + high, thin and dense wall that can heat, so the quality can be more step to reduce its durability, rigidity and aluminum wheels, also the same. The results, due to reduced unsprung mass, improve tracking of the road, inertial mass concentration to achieve the agility to manipulate. (2) four-wheel vehicles (vacuum casting) with excellent corrosion resistance and durability of magnesium wheels for cars, led by real pressure clamor method has been able to mass production. Compared with aluminum and steel wheels + per vehicle reduces l0 ~ l | kg = use of high-purity magnesium alloy AM60 enjoy r = Surface treatment process are: the substrate is improved chromic acid treatment (modified Dow a 【): Tu installation is the use of cationic epoxy electrodeposition coating by 4 times, 3 times drying method composition. Overcome the weaknesses of past poor corrosion resistance to ensure that vehicles have sufficient corrosion resistance wheels. Durability (durability testing rotary bending moments, etc.) than the same size steel wheel high. Basically the same with aluminum wheels. V. Conclusion This paper technology from the manufacturing base as part of processing methods point of view, discusses the aluminum, magnesium in the automotive parts on the application. Aluminum and magnesium as the use of lightweight materials, high value. However, in order to further expand the scope of use, further reducing the manufacturing cost-based product costs. More importantly, the future is to meet the part features, reliability and cost, while the use of appropriate processing methods. In reducing both the quality of a development, research with a variety of functions, such as density tolerance, heat resistance, low thermal expansion coefficient bang, vibration, noise and other new materials (composite materials,[link widoczny dla zalogowanych], quench solidified powder alloys, new Taijin,[link widoczny dla zalogowanych], etc.) work. In aluminum, magnesium active in the two areas together. It and the manufacturing process, like in the future will be more interesting. Wang Lian Ju automatic translation than vehicle technology 1g89.6 Madong Wei (Editor Lin Gu)
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