Calcium silicon manganese steel alloy in cored wire is an important auxiliary material for steelmaking. It has a high deoxidation effect and can remove oxygen in the steel. It can also be used as a warming agent.
Adding calcium silicon manganese steel alloy powder in the steel making process can improve the quality of the finished product. It can be inserted into the molten iron or steel at an ideal position through professional wire feeding equipment.
Calcium silicon is a kind of compound deoxidizer and desulfurizer in steelmaking. It is mainly used for removing gases and nonmetal inclusions in the iron smelting process. It is also used as an inoculum for cast metals, improving the quality of gray and white cast irons. It can increase the silicon and manganese content in molten iron, improve its fluidity and machinability, and also improve its ductility and impact strength.
The deoxidizer is widely used in the ladle refining of liquid steel. It is a highly efficient way to reduce oxygen and sulfur content and modify the shape of inclusions. It is much more effective than conventional aluminum alloy deoxidizers such as metal aluminum or silicon aluminum ferrum. This is mainly because these deoxidizers are easy to float in the molten steel and are easily burned by gasification.
To solve this problem, calcium silicon cored wire is invented. It is a type of linear material that consists of a layer of calcium-iron alloy powder and a sheath made of cold-rolled low-carbon steel strip. It is pushed into the liquid steel through professional cored wire machine so that it can be melted in the ideal position of the molten steel and can react with it. The core powder layer has sufficient ability to grab oxygen and sulfur atoms in the liquid steel, achieving the functions of deoxidation, desulfurization and removal of inclusions.
Compared with metal calcium, silicon calcium has a more powerful grasping ability of oxygen and sulfur atoms in the molten steel, thus it can effectively deoxidize and desulfurize the molten steel. As a result, the content of oxygen and sulfur in molten steel can be reduced to a very low level, and the form of sulfide can be changed, and the utilization rate of calcium can be greatly improved.
The preparation of calcium silicon alloy mainly includes crushing, mixing, heating, and cooling of the raw materials. The raw materials are usually crushed in a ball mill, and then they are heated in an electric furnace. The heating process is the most important one because it allows the raw materials to react at high temperatures.
The prepared calcium silicon alloy is then forged into rods and rolled into coils by professional cored wire machines. The coils are then inserted into the molten steel by using professional wire feeder equipment. This will enable the cored wire to be melted in the correct position, so that the metallurgical material can play its role more effectively.
In the production of cast iron, calcium silicon manganese steel alloy can also serve as an effective inoculant. It helps to form fine or spherical graphite in grey cast iron, makes the graphite distributed evenly, reduces the tendency of whiteness, and increases silicon and desulfurization, and therefore improves the quality of cast iron.
Calcium and silicon have a strong affinity for oxygen, sulphur and nitrogen. This makes them ideal compounds to be used as deoxidizers and desulfurizers in the steel industry. Calcium silicon also improves the performance of steel by increasing its plasticity, impact toughness and mobility.
The cored wire technology is an advanced method of refining metals outside the furnace, and is suitable for the steelmaking and foundry industries. It can significantly increase the efficiency of adding smelting materials to the molten steel and iron. It can be inserted into the desired position in the steel melt through professional wire feeding equipment, and it can also avoid unnecessary reactions between the alloy, air and slag. The process is safer, more effective and less costly than ordinary methods.
The alloy cored wire consists of an outer sheath made of high-quality steel and a powder filling with a ratio of calcium, silicon, aluminum, manganese, carbon, phosphorus and accompanying elements (nitrogen, magnesium, strontium and titanium) of 25 – 52 wt.%; calcium Ca
Silicon-manganese alloy is a metallic ferroalloy with medium and low carbon content, mainly used as a reducing agent for smelting iron and steel. It also acts as a compound deoxidizer and desulfurizer in the steel industry. It is produced mainly in open and fixed submerged heat electric furnaces, but rotary and closed electric furnaces are now widely used.
Both calcium and silicon have a strong affinity for oxygen, and calcium in particular has a very strong affinity not only for oxygen but also for sulfur and nitrogen, so the silicon-calcium alloy can work as an ideal compound deoxidizer and desulfurizer. It is applied to rail steel, low-carbon steel and other steel grades as well as special alloys such as nickel-based alloys and titanium-based alloys as a deoxidizer. It is also used as a temperature-gaining agent in converter steel-making workshops, as inoculant in the production of nodular cast iron and as an additive in the production of continuous casting.
The main function of the cored wire is to introduce calcium and silicon simultaneously into the molten metal. The metallurgical material inside the cored wire is vertically inserted into the molten steel or molten iron through specialized equipment, so that the powder layer can immerse into every corner of the molten metal and make a full chemical reaction. This helps avoid reactions with air and slag and increases the absorptivity of the metallurgy additives.
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