By B I Medovar, V Ya Saenko, G M Grigorenko, Yu M Pomarin, V I Kumysh
The e-book describes the tactic of remelting consumable electrodes with an electrical are burning among the skin of a liquid slag tub and a consumable electrode in a water-cooled copper mildew. the tactic combines the chances of therapy of liquid steel with the electrical arc within the gasoline surroundings and the liquid slag and some great benefits of plasma-arc and electro slag remelting. The technological probabilities, layout positive aspects of melting platforms and result of experimental and business melting trials of steels and alloys are defined. as well as remelting structural steels, specific recognition is given to the opportunity of alloying the steel with nitrogen from the gasoline section, with no utilizing dear nitrogen-bearing nonmetallic compounds, e.g. silicon nitride. it's proven that arc slag remelting is additionally used successfully in generating ingots of titanium and its alloys. the implications got during this procedure are in comparison with electro slag remelting and plasma arc remelting. info on power intake and steel caliber also are offered.
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Additional info for ARC-Slag Remelting of Steel and Alloys
This is one of the main advantages of ASR in comparison with VAR. 8 Arc slag remelting a hollow-section electrode. 1) ingot; 2) metal bath; 3) slag bath; 4) electric arc; 5) consumable electrode; 6) liquid metal film; 7) droplets; 8) water-cooled stool. The depth of the metal bath in melting ingots by the ASR method is smaller than in ESR and the bath is flatter. This is explained by the fact that due the generation of a large part of heat in the arc column in the ASR method, the bath surface is heated more uniformly.
These circumstances reduce the specific consumption of electric energy is ASR in comparison with ESR. 5 m long. Melts were produced with a solid start under ANF-6 flux. The crystallizer was sealed using a flux gate and filled with argon. The following parameters were recorded during melting under the ASR conditions: the intensity and form of current curves Iwork, the voltage between the upper clamp of electrode and the stool, and current Im supplied to the mould. 5 m is determined from the equation where Pel is the parameter of the cross-section of the electrode, cm; wel is the depth of current penetration, cm; Del is the specific resistivity of metal, cm m.
Thus, the amount of the gas impurity in the resultant droplet is Q3. The impurity balance in the first stage is as follows: Q1+Q2=Q3. This equation will now be expanded: where Vm is the linear electrode melting rate, Sf is the area of contact of the film with the gas atmosphere, Cf and Ce is the gas concentration in the film and equilibrium concentration, respectively. Equation (5) will be transformed to the form convenient for application: This dependence determines the degree of saturation of the metal with the gas impurity in the first stage.
ARC-Slag Remelting of Steel and Alloys by B I Medovar, V Ya Saenko, G M Grigorenko, Yu M Pomarin, V I Kumysh