A wide range of high-quality ferro silicon magnesium alloys are available from Midvale Industries, a trusted supplier of metal alloys. The alloys provide a number of benefits for the casting process, including improved nodularization and greater magnesium recovery rates.
MgFeSi (Magnesium Ferrosilicon) is the most commonly used alloy for nodularizing ductile iron castings, and we offer a comprehensive line of nodularizers to fit any treatment process. These include the ELMAG(tm) and LAMET(tm) nodularizers, as well as COMPACTMAG(tm) and Tecproloy(tm) nodularizers for pour-over, sandwich, tundish, flow-through and in-mold treatments.
In addition to nodularizers, we also offer a wide range of recarburizers and conditioners to ensure consistent carbon recovery during the ductile iron melting process. Our recarburizers are readily dissolvable to avoid oxidation, and help to control the carbon content in molten iron during early and late stages of the melting process.
The recarburizers are available in various chemistries and sizes, to ensure that they can be used with every treatment method, and they are formulated by our technical team to optimize your ductile iron treatment. Whether you are using pour-over, sandwich, tundish or flow-through processes, a recarburizer that can be easily dissolvable will provide the consistency needed to optimize your nodularization processes and achieve your desired results.
The use of a spheroidizing agent in the ductile iron melting process is critical to achieving the desired graphite precipitate in a spherical shape. Among the most common spheroidizing agents are boron, manganese, vanadium, tungsten and zirconium. The ferrosilicon-based spheroidizing agents offer significant advantages over other spheroidizing agents, particularly with respect to their deoxidation and desulfurization performance.
This type of spheroidizing agent has a high specific gravity and can penetrate deep into the molten iron. This allows for easy slag separation and removal, and helps to reduce the costs associated with re-melts.
We also carry a variety of other nodularizing additives, including recarburizers and conditioning alloys. These can be used to improve slag separation and removal, boost magnesium recovery, and enhance other cast iron treatment properties.
Our cored wire injection system enables you to add chemical elements in the centre of liquid iron, thereby provoking and certifying the final casting matrix structure. This innovative approach is a unique way of adding metallurgical treatment chemicals to the iron bath.
During the cored wire injection process, a specially designed wire is injected into the liquid iron to allow for a precise amount of chemical element to be added into the base iron. The wire can be positioned vertically or horizontally in the bath and will automatically feed when a desired amount of metallurgical treatment is required.
The most popular MgFeSi alloy for nodularizing ductile or CGI castings is a 5-6% MgFeSi. This is accompanied by additional elements such as calcium and rare earth that optimize the microstructure for these types of castings.
The rare earths are added to the alloys of this invention to counteract the deleterious effects of certain subversive elements in ductile iron, such as S and O2. A proper balance of these REs can be important for superior microstructure, mechanical properties, and less risk for carbides or shrink defects in thin casting sections. In addition, they can increase the strength of the cast iron, reducing the risk of cracking in heavy sections.
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