Nb和热处理对C-Mn-Si系冷轧双相钢组织和性能的影响

特殊钢 ›› 2008, Vol. 29 ›› Issue (2): 13-15.

Nb和热处理对C-Mn-Si系冷轧双相钢组织和性能的影响

张增良¹ 宋仁伯^2,3 程知松⁴ 赵征志¹赵爱民¹刘光明^³ 熊爱明^³

1北京科技大学冶金工程研究院，北京100083;2北京科技大学材料科学与工程学院，北京100083;
3首钢技术研究院，北京100041;4高效轧制国家工程研究中心，北京100083

出版日期:2008-04-01 发布日期:2023-01-17
作者简介:张增良(1981-),男，硕士研究生，汽车用冷轧高强度钢的研究。

Nb and Heat Treatment on Structure and Properties of C-Mn-Si Series Cold Rolled Dual Phase Steel

Zhang Zengliang¹,Song Renbo^2,3,Cheng Zhisong¹,Zhao Zhenghi¹,Zhao Aimin¹,Liu Guangning³and Xiong Aiming³

1 Institute of Metallurgy Engineering Research,University of Science and Technology,Beijing 100083;
2 School of Materials Science and Engineering,University of Science and Technology,Beijing 100083;
3 Shougang Research Institute of Technology,Beijing 100041;4 National Engineering Research Center for Advanced Rolling Technology,University of Science and Technology,Beijing 100083

Published:2008-04-01 Online:2023-01-17

摘要/Abstract

摘要： 用25kg真空感应炉冶炼的含Nb双相钢(%:0.19~0.21C、0.7~0.8Si、1.9~2.1Mn、0.02~0.04Nb) 和不含Nb双相钢(%:0.17~0.19C、0.4~0.6Si、1.7～1.9Mn),经实验室双辊轧机轧成3.5 mm板，再冷轧至1.0 mm和1.36 mm钢板。冷轧板通过盐浴炉加热至740～820℃缓冷至680℃,再以≥50 ℃/s冷至280 ℃保温240 s 空冷。结果表明，随加热温度提高，铁素体-马氏体组织中的马氏体量增加；当加热温度为820 ℃时C-Mn-Si双相钢抗拉强度可达1050 MPa,加Nb后由于晶粒进一步细化，820 ℃加热时，其抗拉强度可达1200 MPa。

Abstract: The dual phase steel adding Nb(0.19～0.21C,0.7～0.8Si,1.9~2. 1Mn,0.02～0.04Nb)and no adding Nb(0. 17~0. 19C,0.4~0.6Si,1.7~1.9Mn)were melted by using a 25 kg vacuum induction furnace and hot rolled to 3.5 mm plate by two-high mill then cold rolled to1.0 mm and 1.36 mm sheet in laboratory. The cold sheet heated in salt bath furnace to740~820 ℃,slow cooled to 680 ℃ then fast cooled with cooling rate ≥50 ℃/s to 280 ℃ for 240 s,air cooling. Results showed that with increasing heating temperature,the martensite content in ferrite-martensite struc- ture increased;As heating temperature was 820 ℃,the tensile strength of C-Mn-Si dual phase steel no adding Nb was up to1050 MPa,and as adding Nb to furher fine grain of structure, the tensile strength of steel was up to 1200 MPa.

张增良宋仁伯程知松赵征志赵爱民刘光明熊爱明. Nb和热处理对C-Mn-Si系冷轧双相钢组织和性能的影响[J]. 特殊钢, 2008, 29(2): 13-15.

Zhang Zengliang, SongRenbo, Cheng Zhisong, Zhao Zhenghi, Zha Aimin, Liu Guangning, Xiong Aiming. Nb and Heat Treatment on Structure and Properties of C-Mn-Si Series Cold Rolled Dual Phase Steel[J]. Special Steel, 2008, 29(2): 13-15.