含錫C-Mn鋼中錫的析出相

孫桂林; 宋波

doi:10.13374/j.issn2095-9389.2017.11.011

含錫C-Mn鋼中錫的析出相

doi: 10.13374/j.issn2095-9389.2017.11.011

孫桂林^1,2, ,,
宋波²

1) 安徽工業大學冶金工程學院, 馬鞍山 243002
2) 北京科技大學冶金與生態工程學院, 北京 100083

詳細信息

中圖分類號: TG142.1
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- 被引次數: 0
出版歷程
- 收稿日期: 2017-04-13

Identification of Sn precipitates in C-Mn steel containing Sn

SUN Gui-lin^{1,2
, ,},
SONG Bo²

1) School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243002, China
2) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 利用掃描電鏡/能譜儀和透射電鏡表征了殘余元素Sn在C-Mn鋼中的存在形式,同時考察了熱處理溫度對含Sn析出相類型的影響.結果表明:Fe-5% Sn中Sn以第二相形式在晶界與晶內析出;Fe-1.5% Sn-0.2% S中Sn以第二相形式在直徑2~4 μm的球形MnS夾雜物上異質析出.透射電鏡分析和熱處理實驗結果表明:在Fe-5% Sn及Fe-1.5% Sn-0.2% S中MnS夾雜上析出的含Sn第二相結構為四方晶系的FeSn₂相.
- 錫 /
- 硫化錳 /
- 析出相 /
- 異質形核 /
- 形貌
Abstract: In most steels, tin (Sn) is a tramp element due to its hot shortness at grain boundaries and the surface, although Sn also has a vital influence on free-cutting steel, electrical sheets, cast iron, and stainless steel. If the problem of hot shortness is solved, scrap recycling will become much easier and Sn can even be used as an important alloying element. As such, it is most important to investigate the forms of Sn precipitation in C-Mn steels at high temperatures. In this study, Fe-5% Sn and Fe-1.5% Sn-0.2% S steels were investigated to clarify the types of Sn precipitates. The morphology, size, and structure of Sn precipitates were characterized by scanning electron microscopy with energy dispersive spectroscopy and transmission electron microscopy. The influence of heat treatment temperature on the type of Sn precipitates was also investigated. The results show that Sn-riched particles precipitate at grain boundaries and in grains in Fe-5% Sn steels, whereas in Fe-1.5% Sn-0.2% S steels, heterogeneous Sn particles precipitate in the size of spherical MnS inclusions with diameters ranging between 2-4 μm. The transmission electron microscopy analysis and heat treatment experimental results show a FeSn₂ structure with a tetragonal system for Sn precipitates in Fe-5% Sn and Fe-1.5% Sn-0.2% S steels.
- tin /
- manganese sulfide /
- precipitate /
- heterogeneous precipitation /
- morphology

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