公开(公告)号：US20230054329A1

公开(公告)日：2023-02-23

申请号：US17792473

申请日：2021-11-23

申请人： DAYE SPECIAL STEEL CO., LTD.

发明人： Mengdi HU ,  Yinghua LEI ,  Zhou ZHANG ,  Ruihai HU ,  Wenchao ZHENG ,  Zhanzhong WANG ,  Lixin ZHOU ,  Guanghui LIU

IPC分类号： C22B9/18 ,  C22B9/00 ,  C22B9/04 ,  C22B9/10 ,  C22C38/44 ,  C22C38/06 ,  C22C38/04 ,  C22B1/00

摘要： Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, ≤0.4% of Si, 0.5-0.7% of Mn, ≤0.012% of P, ≤0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.