CALPHAD-based alloy design for advanced automotive steels - Part I: Development of bearing steels with enhanced strength and optimized microstructure. (September 2016)

• Record Type: Journal Article
• Authors: Cha, Sung Chul; Hong, Seung-Hyun; Kim, Iksoo; Kim, Myung-Yeon; Park, Jihye; Suh, Jin-Yoo; Shim, Jae-Hyeok; Jung, Woo-Sang
• Is Part Of: Calphad. Volume 54(2016)
• Page Start: 165
• Page End: 171
• Publication Date: 2016-09
• Subjects: Alloy design -- Computer simulation -- Steels -- Mechanical property -- Precipitation; Phase diagrams -- Data processing -- Periodicals; Thermochemistry -- Data processing -- Periodicals; Diagrammes de phases -- Informatique -- Périodiques; Thermochimie -- Informatique -- Périodiques; Thermodynamica; Electronic journals; 541.363
• DOI: 10.1016/j.calphad.2016.04.007
• Languages: English
• ISSNs: 0364-5916

Abstract

Abstract: Alloy design is of prime importance for automotive steels to achieve desired properties, such as strength, hardenability and wear resistance. In the present study, CALPHAD-based computational techniques have been successfully utilized to develop advanced steels for automotive applications. The first part of this series describes an integrated computational approach for the compositional modification of bearing steels. A conventional 100CrMn6 bearing steel has been precisely redesigned to achieve strength enhancement with optimized cementite size distribution. The strength of the modified bearing steel was further improved by the addition of 0.2 wt% V using fine vanadium carbide precipitates. Experimental verification of the calculated results confirmed the reliability of the computational method employed in this study. Graphical abstract: fx1 Highlights: CALPHAD-based computational method is utilized to develop advanced bearing steels. The content of C and Mn is redesigned to enhance strength and hardenability. Composition of Si and V is modified for microstructural optimization. Experimental results confirm the reliability of the computational methods.