Review of Te treatment to control MnS inclusions in steel
ZHOU Quanlei1, YANG Wen1, ZHANG Lifeng2
1. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China
Abstract：With the development of steel industry towards high speed and precision, sulfur is usually added to steel to improve its workability. The morphology and distribution of manganese sulfide inclusions in steel have an important influence on steel properties. The goal of manganese sulfide inclusions control is to avoid the generation of large size manganese sulfide and to obtain spindle-shaped manganese sulfide as small and uniform distribution as possible. By adding appropriate sulfur elements and controlling the size and morphology of manganese sulfide inclusions, the free-cutting steel can obtain excellent workability while maintaining strength and toughness. The addition of tellurium can adjust the size and morphology of sulfide in steel, and the MnS inclusions are modified to MnTe-MnS inclusions during solidification, which are usually spherical or nearly spherical, reduces the proportion of large-sized dendritic manganese sulfide and improves the mechanical properties and cutting performance of steel. When the tellurium-sulfur mass ratio in steel is higher than 0.2, the aspect ratio of sulfide in steel will be significantly reduced, and the workability and cutting properties of steel will be improved. The mechanism of Te treatment on the modification of manganese sulfide inclusions in steel and the law and mechanism of tellurium influence on cutting properties of steel are summarized and elaborated, so as to provide reference for further research and development of Te application in steel industry.
周全磊, 杨文, 张立峰. 碲处理控制钢中硫化锰夹杂物综述[J]. 中国冶金, 2023, 33(10): 8-16.
ZHOU Quanlei, YANG Wen, ZHANG Lifeng. Review of Te treatment to control MnS inclusions in steel[J]. China Metallurgy, 2023, 33(10): 8-16.
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2023, Vol. 33 
