电工钢 ›› 2021, Vol. 3 ›› Issue (3): 1-.

• •    下一篇

水轮发电机用冷轧磁极钢DEL550的研制

杨宏武,杜  蓉,谢  芬   

  1. 宝山钢铁股份有限公司 中央研究院(青山),湖北 武汉 430080
  • 出版日期:2021-06-28 发布日期:2021-06-29

Development of cold rolled pole sheet steel DEL550 for hydrogenerators

YANG Hongwu,DU Rong,XIE Fen    

  1. Central Research Institute(Qingshan),Baoshan Iron and Steel Co. Ltd., Wuhan 430080, China
  • Online:2021-06-28 Published:2021-06-29

摘要:

研制了一种高强度、高磁通、高精度的水轮发电机用冷轧磁极钢,通过几组不同化学组分试验,分析钢板的显微组织、力学性能和磁性能,找到适合的化学成分和工艺。结果表明,采用化学成分(质量分数)为C 0.69%Si 0.42%Mn 1.25%P 0.010%S 0.005%Als 0.033%Ti 0.088%Nb 0.039%的磁极钢,经过合适的工艺,能达到550 MPa磁极钢最优性能;钢板组织为铁素体+少量游离渗碳体,晶粒度为12级;钢板屈服强度高于550 MPa,伸长率超过10%,磁感应强度B50大于1.50 T,磁性能良好。

关键词: 磁极钢, 磁感应强度, 退火

Abstract: A cold rolled pole sheet steel with high strength, high magnetic induction intensity and high dimensional accuracy was developed in this paper. In order to find the proper components and technologies of the cold rolled pole sheet steel, the microstructures, mechanical properties and magnetic properties of the test steels with different components were analyzed. The results showed that the 550 MPa pole sheet steel with the component of C  0.69 %,Si 0.42 %,Mn 1.25 %,P≤0.010 %,S≤0.005 %,Als 0.033 %,Ti 0.088 % and Nb 0.039 % will get the best properties by proper technologies. The microstructure of the steel is ferrite and free cementite with the grain size of grade 12, and the yield strength is more than 550 MPa, and the elongation reaches above 10 %, and the magnetic properties are also excellent with the magnetic induction intensity B50 above 1.50 T.

Key words: pole sheet steel, magnetic induction intensity, annealing