碲处理对20CrMnTi齿轮钢中MnS夹杂物改性效果

doi:10.13228/j.boyuan.issn0449-749x.20190075

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Abstract In order to study the influence of tellurium treatment on the morphology of MnS inclusions in steel, the modification effect of high purity tellurium powder added to 20CrMnTi steel was studied by SEM-EDS scanning electron microscope. The results show that the average aspect ratio of inclusions in the steel decreases from 3.17 to 1.83, and the spheroidization effect is obvious. When the tellurium-sulfur ratio was controlled at 0.33, the inclusions in steels with different mass percent of sulfur had obvious differences in morphology. In steels with the mass percent of sulfur of 0.21%, large inclusions embedded in tellurides were formed in MnS, while in steels with the mass percent sulfur of 0.11%, complex inclusions encrusted with tellurides were formed. When the tellurium-sulfur ratio was 3.21, it was found that there was a single high tellurium phase in the steel, the tellurium layer on the outer layer of MnS was also thicker, and the modification rate was only 8.75%, which indicated that the high tellurium-sulfur ratio could not increase the amount of sulfide modification.

Key words： tellurium treatment MnS inclusion 20CrMnTi gear steel

Received: 27 February 2019

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	BAI Xu-xu
	YANG Shu-feng
	LIU Wei
	LI Jing-she
	LIANG Xue

Cite this article:

BAI Xu-xu,YANG Shu-feng,LIU Wei等. Effect of tellurium treatment on modification of MnS inclusion in 20CrMnTi gear steel[J]. Iron and Steel, 2019, 54(12): 35-41.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190075 OR http://www.chinamet.cn/Jweb_gt/EN/Y2019/V54/I12/35

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