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 ›› 2009, Vol. 30 ›› Issue (5): 58-59.

• 组织和性能 • 上一篇    下一篇

超低碳贝氏体钢DB800的研制

陈忠伟,江雅民   

  1. 西北工业大学凝固技术国家重点实验室,西安710072
  • 收稿日期:2009-04-23 出版日期:2009-10-01 发布日期:2022-11-18
  • 作者简介:陈忠伟(1970-),男,博士,副教授,金属材料凝固组织与控制。

Study on Ultra-Low Carbon Bainite Steel DB800

Chen  Zhongwei  ,  Jiang  Yamin   

  1. State Key Laboratory of Solidification,Northwestern Polytechnical University,Xi'an 710072
  • Received:2009-04-23 Published:2009-10-01 Online:2022-11-18

摘要: 测试和研究了50 kg真空感应炉熔炼、控轧控冷16 mm超低碳贝氏体DB800(%:0.058C、0.29Mo、0.05Nb、0.08V、0.02Ti、0.001B)板材的连续冷却转变(CCT)曲线、组织转变和力学性能。结果表明,该试验钢种在冷却速率约为10℃/s的水冷条件下的组织为粒状贝氏体(TEM下呈板条状形貌)。试验钢种具有优良的综合力学性能:抗拉强度885 MPa,屈服强度733 MPa,伸长率15.2%,-20℃纵向冲击韧性值46 J和极优的冷弯性能。

关键词: 超低碳贝氏体钢DB800, 显微组织, 力学性能

Abstract: The CCT(continuous cooling transformation)curves,microstructure transformation and mechanical prop-erties of 16 mm plate of ultra-low carbon bainite steel DB800 (%:0.058C,0.29Mo,0.05Nb,0.08V,0.02Ti, 0.001B) melted by 50 kg vacuum induction furnace and control-rolled and cooled have been measured and studied. Results show that the structure of test steel water cooled with cooling rate 10 ℃/s is globular bainite which presents lath morphology by TEM observation; the test steel has excellent comprehensive mechanical properties:tensile strength-885 MPa,yield strength-733 MPa,elongation- 15.2%,longitudinal impact energy at -20 ℃-46 J and nice cold-bending property.

Key words: Ultra-Low Carbon Bainite Steel DB800, Microstructure, Mechanical Properties