微合金元素Ti-Nb对低碳贝氏体钢组织和力学性能的影响

特殊钢 ›› 2010, Vol. 31 ›› Issue (1): 52-54.

微合金元素Ti-Nb对低碳贝氏体钢组织和力学性能的影响

曹慧泉^1,2, 颜慧成¹, 夏政海³, 罗登³, 李广敏¹, 仇圣桃¹

1钢铁研究总院国家连铸技术工程研究中心，北京100081 ；
2湖南华菱管线股份有限公司，长沙410011；
3湖南华菱湘潭钢铁有限公司，湘潭411101

收稿日期:2009-07-06 出版日期:2010-02-01 发布日期:2022-10-27
作者简介:曹慧泉(1966-),男，博士研究生，钢铁冶金和品种开发.

Effect of Microalloying Elements Ti-Nb on Structure and Mechanical Properties of Low Carbon Bainitic Steel

Cao Huiquan^1,2, Yan Huicheng¹, Xia Zhenghai³, Luo Deng³, Li Guangmin¹ , Qiu Shengtao¹

1 National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081 ；
2 Hunan Valin Steel Tube and Wire Co Ltd, Changsha 410011;
3 Xiangtan Steel Co Ltd, Hunan Valin, Xiangtan 411101

Received:2009-07-06 Published:2010-02-01 Online:2022-10-27

摘要/Abstract

摘要： 试验的700 MPa级低碳贝氏体钢由30 kg真空感应炉熔炼铸成断面100 mm×50 mm扁锭-轧成12mm板。通过CCT曲线和3～30℃/s冷却速度下组织的分析,研究0.01Ti-0.03Nb和0.06Ti-0.05Nb两种微合金化对(%)0.059～0.066C、1.41～1.67Mn、0.30～0.36Si、0.37～0.48Cu、0.21～0.24Ni、0.18～0.22Mo、0.000 8～0.002 2Bs、0.002 6N低碳贝氏体组织和力学性能的影响。结果表明,0.06Ti-0.05Nb钢的强度高于0.01Ti-0.03Nb钢,但前者Ti含量高,-40℃冲击功较后者低。700 MPa级低碳贝氏体钢合适的微合金化Ti-Nb成分为0.04%～0.05%Nb-0.015%～0.025%Ti。

关键词: 低碳贝氏体钢, Ti-Nb微合金化, 组织, 力学性能

Abstract: Test 700 MPa low carbon bainitic steel is melted by a 30 kg vacuum induction furnace, cast to 100 mm x 50 mm flat ingot and rolled to 12 mm plate. Based on CCT curves and analysis on structure of steel at cooling rate 3 ~30 Y/s, the effect of two group microalloying： 0. 06Ti-0. 05Nb and 0. 01Ti-0. 03Nb on structure and mechanical properties of low carbon bainitic steel- % : 0. 059 ~0. 066C, 1. 41 ~ 1. 67Mn, 0. 30 ~0. 36Si, 0. 37 ~0. 48Cu, 0. 21 ~0. 24Ni, 0. 18 ~ 0. 22Mo, 0.000 8 ~0. 002 2Bs, 0. 002 6N has been studied. Results show that the strength of steel with 0. 06Ti-0. 05Nb is higher than that of steel with 0. 01Ti-0. 03Nb, but the impact energy at -40 °C of the former, of which the Ti content is higher, is lower than that of the later. The available microalloying Ti-Nb content in 700 MPa low carbon bainitic steel is 0.015% -0. 025%Ti-0. 04% ~0. 05% Nb.

Key words: Low Carbon Bainitic Steel, Ti-Nb Microalloying, Structure, Mechanical Properties

曹慧泉, 颜慧成, 夏政海, 罗登, 李广敏, 仇圣桃. 微合金元素Ti-Nb对低碳贝氏体钢组织和力学性能的影响[J]. 特殊钢, 2010, 31(1): 52-54.

Cao Huiquan, Yan Huicheng, Xia Zhenghai, Luo Deng, Li Guangmin, Qiu Shengtao. Effect of Microalloying Elements Ti-Nb on Structure and Mechanical Properties of Low Carbon Bainitic Steel[J]. Special Steel, 2010, 31(1): 52-54.