Vermicular graphite cast iron molten iron inoculation multi-feature-point double-sample-cup thermal analysis and evaluation method

Abstract

The invention discloses a vermicular graphite cast iron molten iron inoculation multi-feature-point double-sample-cup thermal analysis evaluation method. Thevermicular graphite cast iron molten iron inoculation multi-feature-point double-sample-cup thermal analysis evaluation method comprises the following steps: in vermicular graphite cast iron production, performing stokehole double-sample-cup collection of an inoculation molten iron thermal analysis cooling curve, and extracting a plurality of groups of feature points on the inoculation molten iron thermal analysis cooling curve; substituting the extracted multiple sets of feature points into a pre-calibrated inoculation index calculation model for calculation, and obtaining an inoculation index calculation value; and comparing the obtained inoculation index calculation value with a pre-calibrated inoculation effect index section range, and evaluating the inoculation effect of the vermicular graphite cast iron according to the inoculation effect index section range where the inoculation index calculation value is located. By adopting the method, the inoculation effect of the vermicular graphite cast iron molten iron can be evaluated more reasonably and accurately, an adjustment basis is provided for dynamic adjustment of the inoculation state in the production process, a good evaluation effect is achieved, and the quality of the cast iron molten iron is ensured. The method 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...

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Problems solved by technology

However, due to the small number of comparison feature points, the weigh

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