|
细化NV颗粒尺寸对提高SAE6140钢强韧性的研究
|
Abstract:
采用转炉冶炼SAE6140合结钢,根据钢中V含量添加微量的N元素,使N含量达到设计目标,可有效提高钢材强韧性、降低生产成本、还减少后续热处理工序。结果表明:钢中[V]设计为0.10%~0.15%,添加氮[N]含量在0.0070%~0.0100%,再利用控轧控冷工艺控制VN颗粒尺寸:20~100 nm占80%,可将屈服强度Rel提高80~170 MPa、延伸率A提高3%~5%、冲击功AKu2提高10~20 J。
The converter was used to smelting SAE6140 composite steel. According to the V content in the steel, trace N elements were added to make the N content reach the design goal, effectively improving the strength and toughness of steel, reducing the production cost and reducing the subsequent heat-treatment process. The results show that the content of vanadium [V] is 0.10%~0.15%, the content of nitrogen [N] is 0.0070%~0.0100%; then the controlled rolling and controlled cooling process is used to control the VN particle size: 20~100 nm accounts for 80%. The yield strength Rel can be increased by 80~170 MPa, the elongation A after fracture can be increased by 3%~5%, and the impact energy AKu2 can be increased by 10~20 J.
[1] | 刘健, 张开坚, 陆建生, 等. 微合金元素钒在钢板中的强化机理及应用[J]. 四川冶金. 2009, 31(2): 15-18. |
[2] | R?兰纳伯格, 等, 著. 钒在微合金钢中的作用[M]. 杨才福, 柳书平, 张永权, 编译. 北京: 钢铁研究总院, 2000: 18-30. |
[3] | 高吉祥, 李春艳, 朱达炎, 等. VN微合金化超细晶高强钢的组织性能研究[J]. 冶金丛刊, 2011(2): 22-24. |
[4] | 丛晓艳. VN元素在微合金化钢中的作用和开发前景[J]. 湖南冶金, 2004, 32(3): 3-5. |
[5] | 杨作宏, 陈伯春. 谈微合金元素Nb、V、Ti在钢中的作用[J]. 甘肃冶金, 2000(4): 20-22. |
[6] | 项程云, 主编. 合金?结构钢(特殊钢丛书) [M]. 北京: 冶金工业出版社, 1998, 2002(重印): 69, 75-77. |
[7] | 冯运莉, 刘国强. VN微合金化HRB400热轧钢筋的研究[J]. 河北冶金, 2020(6): 14-17. |