Ferrophosphorus is obtained from the electric furnace used in phosphorus production. It is a symbiotic compound containing 20-26% phosphorus and 0.1-6% silicon, capable of altering the corrosion resistance and chip resistance of steel. As an alloying agent in the steel industry, ferrophosphorus can also be utilized in the production of phosphates.
Our factory produces two varieties of ferrophosphorus: FeP1 and FeP2, with a phosphorus content ranging from 20-27%. Phosphorus is considered a harmful impurity in most steels; however, in certain circumstances, it exhibits unique functionalities. For instance, adding phosphorus to certain steel types can enhance strength, corrosion resistance, and machinability, albeit at the expense of increased brittleness.
The influence of ferrophosphorus on the properties of cast iron
The introduction of ferrophosphorus into cast iron can improve the fluidity of molten iron, thereby enhancing the performance and surface quality of castings. A 0.5% phosphorus content can elevate the tensile strength of gray iron. Wear-resistant cast iron containing approximately 0.15% phosphorus demonstrates a significant improvement in wear resistance. Train brake shoes, with a phosphorus content ranging from 0.7% to 1.0%, form a uniform binary phosphorus eutectic structure in castings, presenting a mesh-like distribution. The phosphorus eutectic exhibits high hardness, not only enhancing wear resistance but also improving thermal conductivity and heat resistance. This results in a uniform worn surface, reducing the likelihood of sparking during friction. Ultrafine powder of 20% ferrophosphorus can substitute for ultrafine zinc powder as a coating material. Additionally, ferrophosphorus serves as a protective material against ionizing radiation.
The influence of ferrophosphorus on the properties of steel
Ferrophosphorus is added to certain steels to boost strength, corrosion resistance, and machinability, albeit with the trade-off of increased brittleness. When incorporated into cast iron, ferrophosphorus enhances fluidity, casting performance, and surface quality. A phosphorus content of 0.5% improves the tensile strength of gray iron. Approximately 0.15% phosphorus in wear-resistant cast iron significantly enhances its wear resistance.
In conclusion, ferrophosphorus plays a multifaceted role in metallurgy, influencing the properties of both steel and cast iron. Its addition can lead to a range of benefits, from increased strength and wear resistance to improved casting performance. The diverse applications of ferrophosphorus underscore its importance in enhancing the overall quality and functionality of metal alloys across various industrial sectors.