ALUMINIUM INDUSTRY APPLICATIONS
Special anti-oxidant impregnated, extruded graphites used at the purification of aluminium alloys and degasing processes...
Aluminum usage areas and volume are increasing significantly on a global scale. Automotive and construction sectors can be considered 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 molten metal is of great importance for the rigidity of its mechanical properties and heat treatment. Faults that may occur in molten metal will adversely affect the production in the following process steps.
Therefore, we have to perform a very good degassing process in order to increase the quality of the molten metal and make it as purified and homogeneous as possible, in other words, to reach the ideal laboratory conditions. For this purpose, as SKC Carbon, we offer the most economical solution to reach the desired chemical alloy with special antioxidant impregnated graphites used in the purification and degassing processes of aluminum alloys.
The degassing process shows itself as the most important process for aluminum casting to reach the ideal homogeneous structure and prevent porosity. The first cause of porosity formation is the reaction of molten aluminum with the moisture in the environment and forming an oxide layer on the molten metal, also known as slag formation. The second is that the hydrogen contained in the moisture dissolves in the solution. As the temperature increases, hydrogen dissolves more in the liquid and spreads throughout the liquid.
In the first state, oxidation (slag) may have formed a thin layer on the surface in solid state or formed a layer with thick particles that is not desired at all. In case of any fluctuation, large or small, the solid surface overlaps each other and creates an air gap between them and they enter into the liquid as a result of turbulence. This situation is called bifilm formation. In the second state, hydrogen passes into the gas phase in liquid and continues to spread. The sample taken from the liquid metal is subjected to a solidification test under vacuum in the laboratory environment and porosity measurements are made. The hydrogen and bifilm gaps, which appear relatively small in the molten aluminum, grow after solidification and become more apparent and manifest themselves.
Many methods have been tried over time to get rid of both situations. 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. Graphite shaft (graphite shaft) is submerged into the liquid with the help of a graphite rotor connected by a screw method and rotation is performed. The graphite shaft and rotor acting as a mixer creates bubbles inside due to its design. Inert gas, which does not react chemically with the liquid, is introduced into the hole drilled in the shaft center. Thus, the air spaces that we call bifilm inside and the hydrogen turned into gas phase are removed to the surface with the help of bubbles and a 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 the main subjects we are experienced.
Capillary cracks, porosity (spongy appearance) etc. in the final product. We offer carbon graphite products designed according to customer needs with our CNC 5-axis machining center C-axis CNC lathes, our expert technical staff, advanced technology "machine park, especially CNC lathes", for the degassing process that forms the basis of the work. We work with a consciousness that has always prioritized the total quality where the quality management system is applied professionally. In this sense, we provide measurement control at the process and final control stages with the 5-axis CMM Device, which is one of our very important investments.
In another casting method, aluminum billet (aluminum billet) casting applications, we manufacture isostatic graphite ring for the most suitable solutions for dimensional and superficial sensitivities at the point where solidification begins. With the experience of many years, we serve with the most accurate graphite selection that will help to obtain the right, homogeneous casting with our special applications and machining methods in graphite rings.
Graphite plates used as exit tables in aluminum profile production by extrusion method: We manufacture extruded graphite plates or extrusion exit plates.
Graphite thermo couple armor protectors
Electro (immersion) erosion graphites for extrusion profile manufacturing and molding applications
Float (stopper) products are also among our product range.
In short, the most suitable graphite solutions are offered by us for every application in contact with your aluminum alloys.
SKC KARBON SANAYİ VE TİCARET A.Ş. For this purpose, the industrial history dates back to 1962 and has created a very good industrial and company memory, and our new location, with our advanced technology machinery park, and our total quality understanding