About Aluminum Alloy 7075
7075 aluminum alloy is a cold-treated forged alloy with much higher strength than mild steel. As one of the powerful alloys, 7075 aluminum alloy features common corrosion resistance, good mechanical properties and anodic reaction. With fine grains, it has better deep drilling performances, enhanced abrasive resistance for tools, and more outstanding thread rolling. Zinc is the main alloying element in the 7075 aluminum alloy. Adding magnesium into the alloy with 3%-7.5% zinc content leads to MgZn2 which has significant enhancement effects and makes the alloy have much better thermal treatment effects than the aluminum-zinc binary alloy. The increase of zinc and magnesium contents leads to further improved tensile strength but reduced stress corrosion resistance and exfoliation corrosion resistance. After thermal treatment, it can acquire very high strength feature. Usually, a small amount of cuprum and chromium is added in the 7075 material. In its series, 7075-T651 aluminum alloy is considered the first class and best product featuring much higher than any mild steel. Because of its excellent mechanical properties and anodic reaction, this aluminum alloy is typically applicable to aerospace and aviation, mould machining, mechanical equipment, and tooling fixture and especially used to manufacture airplane structures and other high-stress structures with high strength and corrosion resistance requirements.
Based on the above, it is easy to find that the 7075 aluminum alloy not only has much higher strength than mild steel but also features high strength, corrosion resistance and abrasive resistance due to various kinds of elements. This brings very high priority to the 7075 aluminum alloy as to manufacturing aviation parts. However, because of complex structures and several complicated machining positions, these aviation parts make a flock of CNC milling suppliers with insufficient experience flinch. That’s why Yijin Hardware stands out with its most comprehensive CNC programming design software and engineers with rich experience. As far as this custom cnc mill 5 axis aircraft components is concerned, we can make full use of our advantages in combination with cnc mill 5 axis to manufacture perfect custom cnc mill 5 axis aircraft components
Machining Difficulties and Solutions of the Cooling Pump Body for the Helicopter
One of the difficulties for this custom cnc mill 5 axis aircraft components is later surface treatment, and Black Oxidation is another one to the CNC milling supplier. In the air environment, the 7075 aluminum alloy used for airplanes forms an oxidation layer on its surface against corrosion. This layer does not have reliable corrosion resistance and dissolves under alkaline conditions. In this case, the 7075 aluminum alloy has poor surface hardness, without abrasion resistance and corrosion resistance meeting requirements, so its application in the aviation industry is limited. Using the method of thermal treatment and composition change can improve the performances of the 7075 aluminum alloy to some extent, but the manufacturing of some parts has high requirements for its abrasion resistance and corrosion resistance. A successful CNC milling solution company with profession CNC milling workshops would decide to enhance the 7075 aluminum alloy’s surface work, so as to improve the performances of your CNC milling parts in terms of part appearance, surface smoothness, and corrosion
Performing anodic oxidation for aluminum alloy parts made from 7075 aluminum alloy is more difficult than that for aluminum alloy parts of other grades. For example, anodic oxidation for the parts made from 7075 aluminum alloy is extremely unstable, and only the aluminum color and black are suitable. Anodic oxidation into bright colors including red, yellow or green leads to a very high defect rate. The main reason is that the 7075 aluminum alloy contains a large amount of Zinc, a chemical element with the biggest influence on oxidation effects, which causes various defects to the parts made from 7075 aluminum alloy during anodic oxidation.
Performing anodic oxidation for aluminum alloy parts made from 7075 aluminum alloy is more difficult than that for aluminum alloy parts of other grades. For example, anodic oxidation for the parts made from 7075 aluminum alloy is extremely unstable, and only the aluminum color and black are suitable. Anodic oxidation into bright colors including red, yellow or green leads to a very high defect rate. The main reason is that the 7075 aluminum alloy contains a large amount of Zinc, a chemical element with the biggest influence on oxidation effects, which causes various defects to the parts made from 7075 aluminum alloy during anodic oxidation.
CNC milling parts with several complicated machining positions, like this custom cnc mill 5 axis aircraft components, cnc mill 5 axis is the best solution. Besides, As a top CNC milling/turning parts manufacturer all over the world, Yijin Hardware is dedicated to providing the best precision CNC milling parts and the most advanced and quality precision cnc machining services. Click the button below to send you demand to us and find out that Yijin Hardware is quite professional and sufficiently experienced, just as what they told you!
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