Thermodynamic behaviour of nitrogen in the carbon saturated Fe-Mn-Si alloy during casting. (2nd September 2020)

• Record Type: Journal Article
• Authors: Paek, Min-Kyu; Jeon, Junmo; Lindberg, Daniel
• Is Part Of: International journal of cast metals research. Volume 33:Number 4/5(2020)
• Page Start: 226
• Page End: 232
• Publication Date: 2020-09-02
• Subjects: Nitrogen -- defect -- blowholes -- grey cast iron -- transition temperature -- Fe-Mn-Si-C-N system; Metal castings -- Periodicals; Founding -- Periodicals; Foundry research -- Periodicals; Foundry chemistry -- Periodicals; 671.2
• DOI: 10.1080/13640461.2020.1834176
• Languages: English
• ISSNs: 1364-0461

Abstract

ABSTRACT: The evolution of nitrogen gas formation in cast iron was studied based on the information of the N solubility in the carbon-saturated iron-containing Mn and Si over the wide temperature range. In order to verify the accuracy of the Fe-Mn-Si-C phase diagram, the transition temperatures of the Fe-Mn-2.7 wt%Si-Csat alloys were measured according to the Mn concentration using a differential scanning calorimetry under the purified Ar atmosphere. The recent thermodynamic modelling result of the Fe-Mn-Si-C-N system was used to describe the solubility limit of N in liquid and solid solution in the carbon saturated iron alloys. The cooling and quenching experiments were also carried out to check the effects of temperature and phase transformation on the N solubility limit in the temperature range from 500°C to 900°C.