ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2008, Vol. 29 ›› Issue (5): 16-18.

• 试验研究 • 上一篇    下一篇

Cu在贝氏体钢铁素体中的比界面能及熟化速率计算

李广敏1,2,颜慧成2,仇圣桃2,雍岐龙2,项金钟1   

  1. 1. 云南大学材料系,昆明 650091 ;
    2. 钢铁研究总院先进钢铁流程及材料国家重点实验室,北京 100081;
  • 收稿日期:2008-03-03 出版日期:2008-10-01 发布日期:2023-01-04
  • 作者简介:李广敏(1982-),男,硕士,贝氏体钢研究。

Calculation of Specific Interfacial Energy and Ripening Rate for Cooper in Ferrite of Bainite Steel

Li Guangmin1,2 , Yan Huicheng2 , Qiu Shengtao2 , Yong Qilong2 , Xiang Jinzhong1   

  1. 1. Department of Material, Yunnan University, Kunming 650091 ;
    2. State Key Laboratory of Advanced Iron and Steel Process, Central Iron and Steel Research Institute, Beijing 100081;
  • Received:2008-03-03 Published:2008-10-01 Online:2023-01-04

摘要: 0.06C-0.40Cu贝氏体钢铁素体中析出ε-Cu与基体保持Kurdjumov-sachs半共格关系,错配位错理论计算出ε-Cu与基体的比界面能随温度升高而增大,Cu在823 K的扩散速率比在723 K大1 000倍,ε=Cu熟化速率提高10倍左右。当ε-Cu析出尺寸为4.5 nm,520℃熟化速率0.312 7 nm-1/3,得出ε-Cu颗粒尺寸为9.92 nm,钢的屈服强度提高142.8 MPa。

关键词: 铁素体, ε-Cu, 比界面能, 熟化速率

Abstract: Cu precipitated in feirite of 0.06C-0.40Cu bainite steel is kept with matrix in semi-coherent Kurdjumov-sachs relation, according to the theory of mismatch dislocation, with increasing temperature the calculated specific interfacial energy between ε-Cu and ferrite matrix increases, the coefficient of diffusion of Cu at 823 K is 1 000 times more than that at 723 K, and the ripening rate of ε-Cu increases approximately by 10 times. As ε-Cu precipitated size is 4.5 nm, ripening rate at 520 °C is 0.3127 nm-1/3, the ε-Cu particle size is 9.92 nm, yield strength of steel increases by 142.8 MPa.

Key words: Ferrite, ε-Cu, Specific Interfacial Energy, Ripening Rate