Electroslag remelting is a steelmaking method that uses the resistance heat generated when an electric current is passed through molten slag to melt metal electrodes. In this process, the metal electrode is heated and melted, and falls in the form of droplets through the slag layer into the metal molten pool of the water-cooled crystallizer, and finally crystallizes into a steel ingot. The heat generated in this process can be calculated by the formula Q = I2R, where Q represents the heat generated per unit time, I represents the current intensity, and R represents the slag resistance.
During the electroslag remelting process, the metal electrode is buried in the slag layer. After electricity is applied, the slag heat resistance generated by the molten slag causes the electrode to gradually heat up until it melts. The melting process starts from the surface layer in the high-temperature zone and accumulates at the ends of the electrodes to form molten droplets. Through the triple action of gravity, slag-liquid interfacial tension and electrodynamic force, the superheated molten droplets drip from the end of the electrode and fall through the slag layer into the crystallizer when g+R*>σ. During the whole process, the electrode continues to melt, and the metal liquid in the water-cooled crystallizer increases and solidifies into an ingot. During the process of the molten droplets passing through the slag layer, the molten metal and the molten slag have a large contact surface, which promotes the metallurgical reaction of the slag-metal, thus removing a large amount of impurities in the metal.
Electroslag remelting offers many advantages in superalloy production. First, it can purify high-temperature alloys, reduce segregation in the alloy, and improve the crystal structure of the alloy ingot. Secondly, the high-temperature alloy remelted by electroslag has good forgeability, the surface quality of the forged material is excellent, and the yield rate is high. Therefore, electroslag remelting plays a very important role in the production of high-temperature alloys.
For electroslag furnace remelting, the selection of appropriate equipment and process parameters is crucial. In terms of equipment, an electroslag furnace is a must-have, capable of melting metal electrodes through resistive heat generated by electric current. At the same time, the design of the water-cooled crystallizer also needs to consider the falling and solidification process of metal droplets.
The selection of process parameters needs to be determined based on specific alloy materials and product requirements. Including the selection of parameters such as current intensity, slag resistance, electrode material and size, slag layer thickness, etc. Reasonable selection of these parameters can affect the remelting effect and the quality of the finished product.
During the electroslag remelting process, quality control is also required. By controlling parameters such as current intensity, slag resistance and slag layer thickness, the control and purification effect of the molten metal can be achieved. At the same time, reasonable control and treatment are also required for segregation and defects in alloys.
The application of electroslag remelting in superalloy production has achieved remarkable results. Many high-temperature alloy grades incorporate this process, resulting in improved metal quality and product performance. In my country, the electroslag remelting process has become one of the main process routes for producing high-temperature alloys and has achieved gratifying development and innovation.
In short, electroslag furnace remelting, as a new smelting method, plays an important role in the production of high-temperature alloys. Through the selection of appropriate equipment and process parameters, the purification and refining of high-temperature alloys can be achieved and the quality and performance of the products can be improved. The electroslag remelting process has achieved significant development in our country and has gradually approached or caught up with the world’s advanced level.
Tianjin Anton Metal Manufacture Co., Ltd. is a company specializing in the production of various nickel-based alloys, Hastelloy alloys and high-temperature alloy materials. The company was established in 1989 with a registered capital of 10.0 million, specializing in the production and sales of alloy materials. Anton Metal’s products are widely used in aerospace, chemical industry, electric power, automobile, nuclear energy and other fields, and can also provide customized alloy material solutions according to customer needs. If you need to know the price consultation of alloy materials or provide customized alloy material solutions, please feel free to contact the sales staff.
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Post time: Nov-25-2023
