A method for thermal analysis and evaluation of vermicular graphite cast iron molten iron inoculated with multiple feature points and double sample cups

Abstract

The invention discloses a method for thermal analysis and evaluation of a multi-feature point double-sample cup for inoculation of molten iron in vermicular graphite cast iron, which includes collecting double-sample cups in front of the furnace for thermal analysis and cooling curves of inoculated molten iron in the production of vermicular graphite cast iron, and extracting the inoculated Multiple groups of feature points on the cooling curve of molten iron thermal analysis; bring the extracted multiple groups of feature points into the pre-calibrated inoculum index calculation model for calculation, and obtain the inoculum index calculation value; combine the obtained inoculation index calculation value with the pre-calibrated The inoculation effect index section range is compared, and the inoculation effect of vermicular graphite cast iron is evaluated according to the inoculation effect index section range of the inoculation index calculation value. The invention can make the evaluation of the inoculation effect of the vermicular graphite cast iron molten iron more reasonable and accurate, provide adjustment basis for the dynamic adjustment of the inoculation state in the production process, achieve a good evaluation effect, and ensure the quality of the cast iron molten iron. It also has a certain evaluation effect on the inoculation effect of cast iron molten iron in other graphite forms.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a method for thermal analysis and evaluation of a multi-feature-point double-sample cup for inoculation of vermicular graphite cast iron molten iron. Background technique [0002] The inoculation of cast iron is to add one or several substances into the molten iron, which can change the structure of the casting and improve the performance, but has little effect on the chemical composition of the cast iron. Inoculation in cast iron can promote graphitization, which is very important for the production of high-quality compacted graphite iron. Production and practice have proved that inoculation treatment can not only eliminate the white structure caused by the addition of vermicularizers, separate part of the carbon in the cementite, and re-grow into new worm-like graphite or spherical graphite; it can also create more Graphite crystallization core increases the number...

AI Technical Summary

Problems solved by technology

However, due to the small number of comparison feature points, the weight coefficient is difficult to determine, and the practicability is poor.

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