氧含量、溫度與鉍對易切削鋼中MnS形貌的影響

林騰昌; 朱榮; 姚柳潔; 劉潤藻

doi:10.13374/j.issn2095-9389.2018.s1.006

氧含量、溫度與鉍對易切削鋼中MnS形貌的影響

doi: 10.13374/j.issn2095-9389.2018.s1.006

1. 鋼鐵研究總院冶金工藝研究所;
2. 北京科技大學冶金與生態工程學院

基金項目:

國家重點研發計劃資助項目 (2017YFB07B030400)

國家自然科學基金資助項目 (51674092)

詳細信息

通訊作者:
林騰昌, E-mail:lintengchang@126.com

中圖分類號: TG142.1
計量
- 文章訪問數: 16
- HTML全文瀏覽量: 4
- PDF下載量: 0
- 被引次數: 0
出版歷程
- 收稿日期: 2018-02-01
- 網絡出版日期: 2023-07-18

Influence of temperature,oxygen,and Bi on the morphology of MnS in free-cutting steel

1. Institute for Metallurgical Process,Central Iron and Steel Research Institute;
2. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing

摘要

摘要: 運用熱態實驗、化學分析、掃描電鏡分析、熱力學計算等方法研究了全氧、溫度和Bi元素對MnS夾雜物形貌的影響.結果表明, 鋼中較高的氧含量、高溫加熱和Bi均可有效降低鋼中夾雜物的長寬比, 并可以提高大粒徑夾雜物的比例.統計分析發現, MnS夾雜物的長寬比隨全氧含量升高而降低.無論在鑄態鋼或軋材中, 夾雜物的長寬比隨著單個夾雜物的面積增大而增大.隨熱處理溫度的升高, 鋼中出現大粒徑的夾雜物, 同時夾雜物的外圍輪廓變得清晰.900℃和1200℃熱處理后鋼中面積0⁵μm²夾雜物長寬比低于2.0, 比加熱前夾雜物長寬比降低了43%.熱態實驗發現T.O=2.2×10^-5、0.0010%Bi的易切削鋼中, 面積0⁵μm²夾雜物長寬比低于1.6, 比900℃和1200℃熱處理后的夾雜物的長寬比降低了20%以上.
- 氧含量 /
- 溫度 /
- 鉍 /
- 夾雜物 /
- 形貌
Abstract: The influence of oxygen, temperature, and Bi on the morphology of MnS inclusions in free-cutting steel was studied using thermal experiments, chemical analysis, scanning electron microscopy (SEM) research, and thermodynamic calculations.The results show that high oxygen content, high temperature heating, and Bi can effectively reduce the aspect ratio of inclusions in steel and improve the proportion of large particle size inclusion.Statistical analysis reveals that the aspect ratio of MnS inclusions reduce when the total oxygen content becomes higher.The aspect ratio of inclusions increases as the area of a single inclusion in as-cast steel or rolled wire increases.With the increase of the heat treatment temperature, large particle inclusions were found in samples, and the contour of inclusions became clearer.The aspect ratio of inclusions with an area of 0-5μm²became less than 2.0 after 900℃and1200℃heating, which was lower than the aspect ratio before heat treatment by 43%.Thermal experiments reveal that in S-Bi freecutting steel with total oxygen (TO) content of 2.2×10^-5and Bi content of 0.0010%, the aspect ratio of inclusions with area of 0-5μm²is less than 1.6, which is 20%lower than that after 900℃and 1200℃heat treatment.
- oxygen content /
- temperature /
- bismuth /
- inclusion /
- morphology

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參考文獻(17)

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