1. What is electroslag remelting?
1. Slag is the refining agent of the electroslag remelting process, and the main part of the chemical reaction in the remelting process is the slag/gold interface at the electrode, where the metal film conditions are more ideal for the rapid reaction. Ripple protects the metal from contamination The slag acts as a transport medium for the reaction components.
2. Electroslag remelting, also known as electroslag ingot and electroslag refining. The principle is a method of metal refining using an electric current through the heat generated by the slag.
3. What is electroslag remeltingElectroslag remelting steel is a method that uses the resistive heat generated when the current passes through the slag as a heat source for smelting. Its main purpose is to purify the metal and obtain an ingot with a clean tissue and uniform density.
4. Using electroslag remelting technology, high-strength and plastic-tough cannon steel can be smelted for high-pressure tank guns, but the wall thickness of the body tube is still thick, and the self-tightening technology of the body tube can allow the wall thickness of the body tube to be thinned at the same technical performance level of the body tube
, and can greatly improve the fatigue life of the body.
Second, the main role of electroslag remelting
1. The electroslag melting and casting process fundamentally solves the main contradiction of the general casting process, which combines the advantages of electroslag resolubilization-obtaining metals of high metallurgical quality and casting-casting special-shaped parts refinement blanks, and has the characteristics of dense structure and no anisotropy similar to that of ordinary smelted deformed metals.
2. In addition, electroslag remelting technology can also save energy, improve production efficiency and reduce production costs. However, there are some problems with electroslag remelting technology. First of all, the investment and maintenance costs of electroslag remelting equipment are high. Secondly, a large amount of exhaust gas and waste residue will be generated during the electroslag remelting process, which needs to be treated and discharged.
3. In addition, after electroslag remelting, the thermoplasticity of steel and toughness of steel are improved. Improved mechanical properties. After electroslag remelting, the micro-segregation and inclusions of the steel ingots are improved, and the structure of the steel is uniform and dense, so as to improve the mechanical properties of the steel, especially the longitudinal and transverse performance differences of the steel and the center and edge are significantly improved.
4. The metal enters the slag pool from above the molten pool, and then is heated, melted, refined and superheated, and subjected to vibration, stirring and electrochemical action. Therefore, it is obviously important to form a slag pond and keep it in the right conditions. Slag has the following functions.
5. Electroslag remelt slag is an alkaline melt containing CaO, CaFAl2OMgO, SiO2 and other components that have appropriate conductivity at high temperature and have the ability of desulfurization, dephosphorization, and removal of non-metallic inclusions. The slag pool is the core part of the electroslag remelting process, which plays an extremely important role in the melting, refining and solidification of metals.
6. The effect of electroslag on die steel After electroslag remelting, the structure and properties of die steel are significantly improved, which is mainly manifested in the following aspects: improving the low-magnification structure of steel. In the case of electroslag remelting, the direction of crystallization changes due to the rapid solidification of the molten steel, which is significantly improved compared with ordinary die-cast ingots.