Ductile iron, also known as gray iron, is characterized by the flake shape of graphite molecules. It has excellent wear resistance, machinability, and fatigue strength.
The core of most metal powder type welding wires contains arc stabilizers, deoxidizers, and slag forming agents. The chemical composition of this core influences the weld microstructures and performance.
Magnesium is a unique metal that can be used to improve the performance of specific fabrication applications. It's 78% lighter than aluminum and a more versatile material that can be cast, hot-formed or machined without sacrificing strength.
In the wire-arc directed energy deposition (DED) process, cored metal wires deliver the desired alloy compositions with greater efficiency than solid or coated electrodes [17]. A cored-metal wire consists of a metallic sheath and a core powder that delivers the magnesium inoculation. The sheath is typically made of cobalt, nickel or iron while the core is made of a high purity magnesium-silicate.
All Proservice ITACA Wire treatment stations are custom designed and engineered based on your foundry's casting processes, ladle layout and cycle time. Our advanced technology compensates injection speed in real-time based on the current iron quantity, molten metal temperature and the ladle geometry. This results in a consistent, accurate and automated injection. It also prevents variations in the magnesium injection sequence that can negatively impact the final product.
Sulfur is a harmful impurity in liquid steel and must be kept to minimal levels. It is used, however, to form specific inclusions to improve the machinability of steels and reduce tool wear. Cored wire is a safer and more efficient way to add sulfur to molten steel than direct injection.
Ductile iron, also known as nodular or malleable iron, is characterized by the addition of magnesium that creates a different microstructure and set of mechanical properties than gray iron. When the alloy is cast, the graphite forms spheroid-like nodules instead of the flakes found in gray iron.
Ductile iron is often used in water pipes because it withstands the high pressure that these types of infrastructures must endure. It is also more flexible than other utility pipes, which helps them withstand the forces that they must endure underground. It is also commonly used in railroad rolling stock and engine blocks, sprockets, chains, and other heavy machinery components that must be resistant to impact and sliding abrasion.
Ductile iron or nodular iron is a molten metal that forms in a spheroid structure instead of the flakes found in gray cast iron. During the casting process, a mixture of additives is introduced into the alloy to control its microstructure and produce different grades of ductile iron. One of these additives is zinc. Zinc promotes the formation of acicular ferrite, which reduces the transformation of austenite to bainite during welding. This results in increased weldability of low and high-alloy nickel based superalloys such as Inconel 713, Inconel 738, Rene 77 and more.
The invention provides for a composite welding wire comprising a ductile core wire 101 and an outer surface layer 102 enriched with melting point depressants. The ductile core wire may be produced for example by hot or cold drawing of a standard or custom manufactured ductile nickel, cobalt and/or iron based alloy. The outer surface layer 102 may be bonded to the ductile core wire by slurry bonding, electrolytic bonding, pack boriding or gas boronizing.
Ductile iron, also known as nodular iron, has a unique microcrystalline structure that allows it to absorb and retain lubricants and trap non-abrasive wear particles. It is used for a variety of industrial applications such as steering knuckles, plow shares, locomotive and railroad gears, heavy equipment cylinder liners, engine blocks and frames and hydraulic components.
Nickel-chromium alloys are prized for their corrosion resistance and high strength. They are available in both solid and cored wire forms, including flux-cored, metal-cored, coiled and drum packaged products.
The E81T1-Ni1M flux-cored metal wire is designed to join low-alloy high-strength steels, such as those used in mining vehicles and other earthmoving equipment. Its composition allows it to reduce the continuous-cooling phase transition temperature and improve the microstructure in the weld zone. This improves the amount of acicular ferrite in the weld, which enhances the impact toughness and tensile properties of the weld.
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