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 ›› 2018, Vol. 39 ›› Issue (2): 65-67.

• 组织和性能 • 上一篇    下一篇

硼对780 MPa低碳贝氏体钢组织和力学性能的影响

赵燕青1,孙力1,刘宏强1,王九清2,安会龙1,罗应明2,车金锋2   

  1. 1河钢集团钢研总院,石家庄050023;
    2河钢集团舞钢公司,平顶山462500
  • 收稿日期:2017-10-30 出版日期:2018-04-01 发布日期:2022-07-04
  • 作者简介:赵燕青(1984-),男,硕士(2011年北京科技大学),工程师,2008年河北工业大学(本科)毕业,轧钢工艺及金属热处理研究。

Effect of Boron on Structure and Mechanical Properties of 780 MPa Low Carbon Bainite Steel

Zhao Yanqing1, Sun Li1 , Liu Hongqiang1, Wang Jiuqing2, An Huilong1, Luo Yingming2, Che Jinfeng2   

  1. 1 General Research Institute, Hesteel Group, Shijiazhuang 050023 ;
    2 Wuyang Iron and Steel Co Ltd, Hesteel Group, Pingdingshan 462500
  • Received:2017-10-30 Published:2018-04-01 Online:2022-07-04

摘要: 试验低碳贝氏体钢(/%:0.08C,0.11~0.13Si,1.10~1.20Mn,0.008~0.009P,0.002S,0.21~0.23Ni,0.020~0.021Ti,0.003~0.004Nb,0~0.0010B,0.000 7~0.0008O,0.0031~0.0033N)由50kg真空感应炉熔炼,轧成45mm钢板,并经930℃淬火,610℃回火。研究了0.0010%硼对780 MPa低碳贝氏体钢45mm板组织和力学性能的影响。结果表明,硼可显著提高试验钢的淬透性,不含硼试验钢淬火后得到粒状贝氏体,0.0010%硼试验钢淬火后得到板条贝氏体。硼明显改善试验低碳贝氏体钢的力学性能,含0.0010%硼试验钢淬、回火后的抗拉强度834MPa和屈服强度771MPa远高于不含硼试验钢的抗拉强度702MPa和屈服强度591MPa,实际生产中应加入适量硼可使低碳贝氏体钢得到板条贝氏体。

关键词: 硼, 低碳贝氏体钢, 组织, 力学性能

Abstract: The tested low carbon bainite steel (/%: 0.08C, 0.11~0.13Si, 1.10~1.12Mn, 0.008〜0.009P, 0.002S, 0.21~0.23Ni, 0.020~0.021Ti, 0.003〜0.004Nb, 0~0.0010B, 0.0007~0.0008O, 0.0031~0.0033N) is melted by a 50kg vacuum induction furnace, rolled to 45mm plate, quenched at 930℃ and tempered at 610°C. The effect of 0.0010% boron on structure and mechanical properties of 45mm plate of 780MPa low carbon bainite steel has been studied. Results show that boron can remarkably improve the hardenability of tested steel, the structure of quenched tested steel without bearing boron is granular bainite, and the structure of quenched 0.0010% boron tested steel is lath bainite. The boron can obviously improve the mechanical properties of tested low carbon bainite steel, the tensile strength 834MPa and yield strength 771MPa of quenched-tempered bearing 0.0010% boron tested steel is higher than the tensile strength 702MPa and yield strength 591MPa of quenched-tempered without bearing boron tested steel. Adding suitable boron in steel in practical production the low carbon bainite steel can get lath bainite structure.