Aluminum Industry Applications

The areas and volume of aluminum usage on a global scale are increasing significantly. The automotive and construction sectors can be counted as the locomotive sectors in this sense.Achieving the ideal result in the final product is of great importance in terms of the output of the product at the end user.The content of the molten metal is of great importance for the rigidity of its mechanical properties and heat treatments.

Errors that may occur in the molten metal will adversely affect production in the following process stages. Therefore, we have to perform a very good degassing process to increase the quality of the molten metal, to make it as purified and homogeneous as possible, in other words, to achieve ideal laboratory conditions. For this, as SKC Karbon, we offer the most economical solution to reach the desired chemical alloy with special antioxidant impregnated graphites used in the purification and degassing of aluminum alloys.

The degassing process is the most important process for aluminum casting to reach its ideal homogeneous structure and to prevent porosity. The first of the main reasons for porosity formation is the reaction of molten aluminum with moisture in the environment and the formation of an oxide layer on the molten metal, also known as slag formation. The second is the dissolution of hydrogen in the melt. As the temperature increases, hydrogen dissolves more in the liquid and spreads throughout the liquid.

Oxidation (slag) in the first case may have formed a thin layer on the surface in solid form, or it may have formed an undesirable thick particulate layer. In the event of any fluctuation, large or small, the solid surface overlaps each other, creating an air gap between them, and they enter the liquid as a result of turbulence. This is called bifilm formation. In the second case, hydrogen enters the gas phase in the liquid and continues to diffuse. The sample taken from the liquid metal is subjected to solidification test under vacuum in the laboratory environment and porosity measurements are made. Hydrogen and bifilm voids, which appear relatively small in molten aluminum, become larger and more pronounced after solidification.

Many methods have been tried over time to get rid of both conditions. The most suitable of these methods has been the use of graphite due to its high resistance to oxidation and thermal shocks and its lack of chemical reaction with the liquid. The graphite shaft (graphite shaft) is immersed in the liquid and rotated with the help of a graphite rotor connected to the end of the graphite shaft by screw method. The graphite shaft and rotor, which act as a mixer, create bubbles inside due to their design. Inert gas, which does not react chemically with the liquid, is introduced through the hole drilled in the center of the shaft. Thus, the air gaps inside, which we call bifilm, and the hydrogen that has turned into the gas phase are brought to the surface with the help of bubbles and liquid metal with a homogeneous structure is obtained. We call this process degassing.

Graphite elements, graphite rotors and shafts used during degassing in all high pressure and low pressure, injection molding and piston manufacturing are among the most experienced subjects.

In order to prevent capillary cracks, porosity (spongy appearance), etc. in the final product, to reach the ideal density, and for the degassing process that forms the basis of the work, we offer carbon graphite products designed in accordance with customer needs with our expert technical staff, advanced technology "especially our machine park consisting of CNC machines", including CNC 5-axis machining center C-axis CNC lathes. We work with a consciousness that has always prioritized total quality, where the quality management system is applied professionally. In this sense, we provide measurement control in the process and final control stages with the 5-axis CMM Device, which is one of our very important investments.

In aluminum billet casting applications, which is another casting method, we manufacture isostatic graphite rings for the most suitable solutions for dimensional and surface sensitivities at the point where solidification begins. With many years of experience, we provide service with the most accurate graphite selection that will help to obtain the correct, homogeneous casting with some special applications and machining methods in graphite rings.

Graphite plates used as output plates in aluminum profile production by extrusion method: We manufacture extruded graphite plates or extrusion outlet plates.

Graphite thermo couple armor protectorsElectro (plunge) erosion graphite for extrusion profiles manufacturing molding applicationsFloat (stopper) products are also among our product range. In short, we offer the most suitable graphite solutions for every application in contact with your aluminum alloys.

SKC KARBON INDUSTRY AND TRADE INC. For this purpose, our new location, which has an industrial history dating back to 1962 and has created a very good industrial and company memory, continues its efforts to ship high efficiency, precise graphite products to our customers at the most affordable price and time by processing carbon and graphite materials in the fields of electrical, industrial and mechanical applications in accordance with today's technology under the roof of our advanced technology machine park and with our total quality understanding."