Silicon incorporates a corrosive effect on cemented carbide. Although aluminum alloys with in excess of 12% Si are generally called high-silicon aluminum alloys, gem tools are recommended, but this may not be absolute. The gradual increase with silicon content will gradually raise the destructive power of that tools. Therefore, some manufacturers recommend the use of diamond tools when the actual silicon content exceeds 8%.
Aluminum alloy with a silicon content of 8%-12% may be a transitional interval. Both ordinary cemented carbide and diamond tools works extremely well. But the use regarding hard alloy should apply PVD (physical coating) approach, does not contain metal, and the film thick is small. Because the PVD method and the small film thickness make it possible for the tool not to lose a sharp cutting frame (otherwise, in order to prevent the abnormal growth from the film at the fresh, sufficient passivation of the fresh is required, and the cutting of aluminum alloy will not be sharp enough), And the film material containing aluminum may cause the blade film to interact using the workpiece material and destroy the bond between the film and also the tool matrix. Because the super-hard coating is mostly a compound of aluminum, nitrogen, and also titanium, it may be chipped due to several peeling off the cemented carbide matrix when the film peels off.
Experts recommend to use one of the following three types of tools:
1. Uncoated ultra-fine grained carbide methods
2. Carbide tools having non-aluminum coating (PVD) technique, such as TiN, TiC, and so forth.
3. Use diamond methods
The chip space of the tool should be substantial. Generally, it is recommended to apply 2 teeth, and the rake and clearance angles really should be large (such as 12°-14°, just like end tooth clearance angle).
If it can be only a general deal with milling, you can use a strong indexable face milling used vinyl cutter with an entering angle of 45° plus a blade specially processed intended for aluminum alloy. The effect needs to be better.
Alumina was also used as aluminum while in the laboratory by electrolysis throughout 1808. It has been used being a building material on the spire with the Washington Monument in the nation in 1884. Aluminum alloys synthesized by adding various metal elements have been widely used in that construction industry. In most of links. The thickness involving aluminum alloy sheets: the thickness of superior metal roofing (and curtain wall) systems is normally 0. 8-1. 2mm (while the traditional one is generally ≥2. 5mm).
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