公开(公告)号：US20240035110A1

公开(公告)日：2024-02-01

申请号：US18247564

申请日：2022-12-08

申请人： DAYE SPECIAL STEEL CO., LTD.

发明人： Xiaoliang DONG ,  Xiuli ZHANG ,  Lixin ZHOU ,  Yinghua LEI ,  Xianhua WANG ,  Guangpeng XU ,  Peng XU ,  Guoyang SUN ,  Zaoyu LI ,  Jun ZHANG ,  Dong RUAN

IPC分类号： C21D9/52 ,  C22C33/04 ,  C21C5/00 ,  C21D8/10 ,  C21D1/84 ,  C22C38/54 ,  C22C38/52 ,  C22C38/48 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00 ,  C21C5/52

CPC分类号： C21D9/525 ,  C22C33/04 ,  C21C5/005 ,  C21D8/105 ,  C21D1/84 ,  C22C38/54 ,  C22C38/52 ,  C22C38/48 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21C5/52 ,  C21D2211/001

摘要： The present invention discloses a method for manufacturing a low-carbon nitrogen-containing austenitic stainless steel bar, which sequentially includes the following steps: smelting, electroslag remelting and forging; in the electroslag remelting process, the steel ingot obtained in the smelting process is used as an electrode bar of an electroslag furnace, remelting with specific slag and crystallizing; in the forging process, forging the crystallized steel ingot into a material by a specific forging method; the specific slag comprises CaF2 (65-70%), Al2O3 (15-20%), CaO (5-10%) and MgO (2-5%) in percentage by weight; specific forging methods include upsetting-and-drawing and radial forging, wherein the upsetting-and-drawing includes: a pass deformation is less than 35%, a pass reduction is 50-80 mm, a pass heating temperature is 1130-1150° C., and a pass deformation method is ellipse-ellipse-circle. The method can obtain the low-carbon high-strength nitrogen-containing austenitic stainless steel with uniformly distributed chemical composition and tissues, high purity and high strength.

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.