定向凝固研究易切削鋼中硫化物的生成行為

夏云進; 王福明; 李長榮; 王金龍; 吳朝昀

doi:10.13374/j.issn1001-053x.2012.02.002

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定向凝固研究易切削鋼中硫化物的生成行為

doi: 10.13374/j.issn1001-053x.2012.02.002

夏云進^1,2,
王福明^1,2, ,,
李長榮³,
王金龍^1,2,
吳朝昀^1,2

1. 北京科技大學冶金與生態工程學院, 北京 100083;
2. 北京科技大學生態與循環冶金教育部重點實驗室, 北京 100083;
3. 北京科技大學材料科學與工程學院, 北京 100083

基金項目:

北京市教育委員會共建項目專項資助課題

國家自然科學基金資助項目(51174020)

詳細信息

通訊作者:
王福明,E-mail:fumingwang4@ustb.edu.cn

中圖分類號: TG142.13
計量
- 文章訪問數: 248
- HTML全文瀏覽量: 83
- PDF下載量: 4
- 被引次數: 0
出版歷程
- 收稿日期: 2010-11-02
- 網絡出版日期: 2021-07-30

Study on the formation behavior of sulfides in free-cutting steel by unidirectional solidification

1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Key Lab of the Ministry of Education of China for Ecologic & Recycle Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 通過定向凝固實驗研究了易切削鋼中硫化物的生成過程,并建立了枝晶臂間距、硫化物的平均直徑與凝固條件之間的關系.實驗結果表明:隨著溫度梯度和拉速的增大,MnS的平均直徑減小,數量增多;定向凝固過程中硫化物的完全析出溫度大約在固相線溫度下100℃左右,MnS形態的改變,主要受其組成元素的活度影響,即MnS形態的改變受其界面自由能的影響;對定向凝固實驗中鋼的枝晶臂間距、硫化物的平均直徑與凝固條件的關系進行了擬合,擬合結果與前人研究結果相吻合.
- 易切削鋼 /
- 夾雜物 /
- 硫化錳 /
- 枝晶 /
- 定向凝固
Abstract: The formation behavior of sulfides in free-cutting steel was investigated under unidirectional solidification.The relations of the dendrite arm spacing and sulfides' average diameter to solidification conditions were established.Experimental results show that the average diameter of MnS inclusions decreases with increasing temperature gradient around the solid/liquid zone and casting speed,but the number of MnS inclusions increases.The complete precipitation temperature of MnS is about 100℃ lower than the solidus temperature.The morphological changes of MnS are mainly effected by the activities of constituent elements,in other words,they are mainly influenced by interfacial energy.The relations of the dendrite arm spacing and sulfides' average diameter to solidification conditions were regressed,and the regression results are basically in agreement with the ones of previous researchers.
- free-cutting steel /
- inclusions /
- manganese sulfide /
- dendrites /
- unidirectional solidification