Study on CaO and CaS inclusions in pipeline steel during refining process

LI Shu-sen; REN Ying; ZHANG Li-feng; YANG Wen

doi:10.13374/j.issn1001-053x.2014.s1.031

Volume 36 Issue S1

Jul. 2021

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LI Shu-sen, REN Ying, ZHANG Li-feng, YANG Wen. Study on CaO and CaS inclusions in pipeline steel during refining process[J]. Chinese Journal of Engineering, 2014, 36(S1): 168-172. doi: 10.13374/j.issn1001-053x.2014.s1.031

Citation:

LI Shu-sen, REN Ying, ZHANG Li-feng, YANG Wen. Study on CaO and CaS inclusions in pipeline steel during refining process[J]. Chinese Journal of Engineering, 2014, 36(S1): 168-172. doi: 10.13374/j.issn1001-053x.2014.s1.031

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Study on CaO and CaS inclusions in pipeline steel during refining process

doi: 10.13374/j.issn1001-053x.2014.s1.031

1. School of Metallurgical and Ecological Engineerin, University of Science and Technology Beijing, Beijing 100083, China;
2. Technology and Quality Departments of Hebei Shougang Qian' an Iron & Steel Co., Ltd., Qian' an 064400, China

Received Date: 2013-10-22
Available Online: 2021-07-19

Abstract

Abstract

The morphology,size,and composition of inclusions were studied by scanning electron microscopy(SEM) in pipeline steel during refining process. The Ca-O equilibrium curve,Ca-S equilibrium curve,and the stability diagrams of inclusions(CaO and CaS) were discussed to explain the formation mechanism of CaO and CaS complex inclusions. The results show that the excessive addition of Ca-Si wireis the reason causing the formation of CaO and CaS complex inclusions.
- pipeline steel,
- calcium treatment,
- CaO,
- CaS,
- thermodynamics