Method for predicting solidification microstructure of electroslag remelting ingot

Abstract

The invention provides a method for predicting solidification microstructure of electroslag remelting ingot, which relates to the technical field of metallurgical smelting. A method for predict solidification microstructure of electroslag remelting cast ingot include collecting equipment parameters and process parameter of electroslag remelting, and obtaining thermophysical parameter data of steelgrade by adopting solute microsegregation model according to composition of electroslag remelting steel grade; Then a macro-and micro-scale mathematical model of ESR process is established. Finally,the parameters of electroslag remelting process and thermophysical parameters of steel are used as the input values of macro-and micro-scale mathematical model of electroslag remelting process to predict the morphology of solidification structure of ingot under different electroslag remelting process conditions. The method for predicting solidification microstructure of electroslag remelting casting ingot provided by the invention has the advantages of low cost, high efficiency, comprehensive analysis and the like compared with the experimental measurement method, and can provide intuitionistic and reliable information for optimizing electroslag remelting process conditions.

Description

technical field [0001] The invention relates to the technical field of metallurgical smelting, in particular to a method for predicting the solidified microstructure of an electroslag remelted ingot. Background technique [0002] Electroslag Remelting (ESR) is a special smelting method that combines refining and directional solidification, which can greatly improve the performance of the original remelted electrode material. In the electroslag remelting process, the current flows into the slag through the consumable electrode, then enters the liquid metal molten pool and solidifies the ingot, and finally flows out from the bottom of the ingot. Since the conductivity of the slag in the entire power supply circuit is much greater than that of the consumable electrode, ingot and external short network, the slag pool will occupy most of the voltage drop of the secondary voltage of the transformer, thereby generating a large amount of Joule heat in the slag pool, which is Electr...

AI Technical Summary

Problems solved by technology

Since electroslag remelting is a special smelting process that integrates metal melting, refining and solidification forming, it involves the coupling calculation of macro and micro physical fields. Most of the existing mathematical models of electroslag remelting ingot solidification structure are based on ProCAST commercial software of Module established (document: Rao Lei, Bruce Lee, Geng Maopeng, et al. Foundry, 2010, 59(6): 594-596; Chen Mingqiu, Li Baokuan, Zhao Lin. Journal of Materials and Metallurgy, 2011, 10(S1): 139-146 ; Li B K, Wang F, Zhang H, et al., Journal of Iron and Steel Research, International, 2011, 18(S2): 159-165; Li B K, Wang Q, Wang F, et al., JOM, 2014 , 66(7): 1153-1165; Zhang He, Lei Hong, Geng Dianqiao, etc. Industrial Heating, 2013, 42(6): 42-46. etc.). Difficult to meet the requirements of electroslag remelting production process process optimization and solidification structure control

Images