Numerical analysis of effect of the solutes on formation of MnS in non-tempered steel. (3rd July 2019)

• Record Type: Journal Article
• Authors: Xie, Jian-bo; Hu, De-lin; Fu, Jian-xun; Liu, Hui
• Is Part Of: Ironmaking & steelmaking. Volume 46:Number 6(2019)
• Page Start: 542
• Page End: 549
• Publication Date: 2019-07-03
• Subjects: Micro-alloyed non-tempered steel -- coupling -- micro-segregation -- solidification -- MnS precipitation; Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1080/03019233.2018.1475453
• Languages: English
• ISSNs: 0301-9233

Abstract

ABSTRACT: To analyse the effects of solute elements on formation of MnS in the micro-alloyed non-tempered steel, a novel coupling model of micro-segregation and MnS precipitation during solidification was built using the finite-difference method. Non-tempered 49MnVS3 steel was used to detect the effects of concentrations of elements on the precipitation behaviour of MnS. The results show that with contents of Mn at 0.05∼2%, S at 0.001∼0.3%, Si at 0.3∼0.7%, P at 0.001∼0.05%, C at 0.05∼1.0%, the precipitation temperature of MnS raised from 1360 to 1432°C, 1397 to 1447°C, 1425 to 1418°C, 1425 to 1418°C, dropped from 1488 to 1358°C, and its precipitation solidification ratio dropped from 1 to 0.785, 1 to 0.51, 0.883 to 0.866, 0.88 to 0.86, 0.96 to 0.77, respectively; the observed temperature of MnS by HT-SM was 1427.2°C, close to the calculated temperature of 1420.6°C by the proposed the diffusion control growth model.