X70管線鋼中含Nb相的析出行為

王鳳琴; 解家英; 胡本芙

doi:10.13374/j.issn1001-053x.2011.11.009

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X70管線鋼中含Nb相的析出行為

doi: 10.13374/j.issn1001-053x.2011.11.009

1. 首鋼技術研究院寬厚板所, 北京 100043;
2. 北京科技大學材料科學與工程學院, 北京 100083

詳細信息

通訊作者:
王鳳琴,E-mail:wfq@mail.shougang.com.cn

中圖分類號: TG141.4
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- 文章訪問數: 235
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- 被引次數: 0
出版歷程
- 收稿日期: 2010-08-12
- 網絡出版日期: 2021-07-30

Precipitation behaviour of Nb in X70 pipeline steel

1. Wide and Heavy Plate Research Department, Shougang Technology Institute, Beijing 100043, China;
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 以首鋼生產的某X70管線鋼成分為基礎,利用Thermo-Calc軟件計算了不同溫度下鋼中析出相的組成、相的析出溫度及Nb元素的析出規律,研究了鋼中Nb和C含量對Nb析出規律的影響,利用熱模擬和掃描電鏡等手段分析了鋼中Nb合金相的析出溫度.結果表明,平衡態下該X70管線鋼中的析出相主要為Ti、Nb的碳氮化物、合金滲碳體、Ti₄C₂S₂、MnS、AlN、M₇C₃和Mo碳化物.Nb析出相主要以Nb和C元素為主,其中固溶Ti和N元素.隨Nb和C含量的增加,Nb合金相的析出溫度升高,在同一溫度下Nb的析出量增加.
- 管線鋼 /
- 合金化元素 /
- 析出 /
- 相成分 /
- 鈮
Abstract: Based on the composition of X70 pipeline steel produced in Shougang Group,the phase structure,the precipitation temperature of phases and the precipitation behaviour of Nb at different temperatures were analyzed by calculation with Thermo-Calc software.The effect rules of Nb and C contents on the precipitation behaviour of Nb were studied.The precipitation temperature of Nb in the steel was analyzed by thermal simulation and scanning electron microscopy(SEM).It is indicated that precipitation phases in the steel are the carbonitrides of Ti and Nb,alloying cementite,Ti₄C₂S₂,MnS,AlN,M₇C₃ and Mo carbides.The Nb precipitation phase mainly consists of the elements of Nb and C,and in the Nb precipitation phase,Ti and N are dissolved.With increasing Nb and C contents,the precipitation temperature of the Nb alloy phase rises and the precipitated Nb content at the same temperature increases.
- pipeline steel /
- alloying elements /
- precipitation /
- phase composition /
- niobium