通过设计合理的化学成分,采用铁水预处理—120t转炉—LF精炼—FTSC连铸机—2机架粗轧+5机架精轧—卷取工艺流程,借助控轧控冷工艺,成功生产了高耐候性Q450NQR1货车车厢板.检验结果表明:该钢板组织为铁素体(F)+少量珠光体(P),晶粒度评级为12级;板卷各项力学性能均能满足要求,平均屈服强度509.2 MPa,平均抗拉强度580 MPa,平均屈强比0.88,平均伸长率30.1％,-40℃V型冲击功达到170J左右.该产品耐腐蚀性能优良,与Q345B相比,Q450NQR1 144h的腐蚀率要低33.33％,可满足供货要求.
参考文献
| [1] | 李晓非,金纪勇,李文权.Si-Cr-Nb高强钢轨钢的研制[J].钢铁,2001(12):46-50. |
| [2] | 钱余海,李自刚.加速腐蚀环境下高强耐候钢Q450NQR1的耐蚀性能研究[J].宝钢技术,2007(02):5-8. |
| [3] | 文小明.铁道货车用Q450NQR1高强钢的研制开发[C].第4届中国金属学会青年学术年会论文集,2008:152-156. |
| [4] | H. E. Townsend .Effects of alloying elements on the corrosion of steel in industrial atmospheres[J].Corrosion: The Journal of Science and Engineering,2001(6):497-501. |
| [5] | Masato Yamashita .Structure of Protective Rust Layers Formed on Weathering Steels by Long-term Exposure in the Industrial Atmospheres of Japan and North America[J].ISIJ International,1998(3):285-290. |
| [6] | Ouchi Chiaki;Sampei Tetsuya;Kozasu Isao .The Effect of Hot Rolling Condition and Chemical Composition on the Onset Temperature of Gamma-Alpha Transformation After Hot Rolling[J].Transactions of the ISIJ,1982,22(03):214. |
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