D - Aluminium Articles

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Different types of alloy

Alloy forms Casting alloys are alloys that contain a total of up to 20% silicon, magnesium and copper as alloying elements and can only be formed by casting. The starting material is usually secondary aluminium (aluminium recovered from scrap). Here, the need for favourable casting properties is of primary concern. In addition, the compositions of

Defects in the forged structure

Defects can occur in the forged structure if radii on the shaped part are too tight or if the parting plane of the die has been wrongly chosen. An inadequate choice of deformation rate can also easily lead to recrystallisation and thus to microstructural damage. The forged structure depends in a complex manner on the geometric shape, the tool

Determination of the hydrogen content of molten aluminium

In order to prevent metal being rejected due to gas porosity, it is important to determine gas content prior to casting. One differentiates between quantitative and qualitative methods of measurement. In the former, a result is obtained that gives a value for the gas content directly, such as in cm3/100g aluminium. Use is made of Sievert’s Law,

Die cast components can be welded

“Welding die cast products? Impossible!” This view is difficult to shift – even among experts. And even in recent industry publications, it’s not uncommon to read that welding and heat treating die cast products is generally unfeasible due to the formation of pores and bubbles. The latest applications, for instance from the car industry, paint a