Development Of A Fast Thermal Analysis System For Compacted Graphite Iron

The compacted graphite iron which has the merit of the flake graphite iron andthe spheroidal graphite iron has good demands in many fields in future. Combiningwith a project of development for cylinder body of compacted graphite iron ofJiangling’s foundry of Jiangxi, this paper did many experiments and developed a fastthermal analysis system using for its production.Firstly, the hardware and software of the experiment was designed according tothe experiment facts and its surrounding conditions. It has accomplished thetemperature data collection, display of the cooling curve and calculation ofcharacteristic values. And its function of temperature data collection and calculationof characteristic values was verified by comparing its experiment results with thesite’s result of Jiangling’s foundry. As for the hardware part, intelligent temperaturedata collection module and industrial tablet, which developed and made by YanhuaCorporation, was adopted and the function of two way’s temperature data acquisitionand processing was accomplished. For the other part, its software, three functionsincluding the carbon and silicon analysis, the vermicularizing analysis and thehistorical data query was developed via C#as programming tool and Access databaseas story.Then, multigroup characteristic values of cooling curve was exactly computedaccording to the collected temperature data processed by the average filtering methodand differential thermal analysis. Compared with the data using in the spot thermalanalyzer, the accuracy of the system’s data processing method was verified.Lastly, studing the relation between characteristic parameter values of the coolingcurve and the graphite morphology of solidified structure, the conclusin that when theminimum eutectic temperature was located in and and the highesteutectic temperature was located in and, the graphite shape wascompacted grahpite was preliminarily drew. Using the intelligent freezing curverecognition and database technology, the feasibility of quantitative evaluation to judge thequilty of vermicular cast iron was preliminarily discussed via the way of sample curve.