专利检索 ap:("ILJIN GLOBAL CO., LTD.") AND inv:"Yoon Gil CHOI" 第 1 页

1.

发明申请
BEARING STEEL AND MANUFACTURING METHOD THEREFOR 审中-公开

公开(公告)号：US20190256939A1

公开(公告)日：2019-08-22

申请号：US16313583

申请日：2017-06-30

申请人： ILJIN GLOBAL CO., LTD.

发明人： Oh Chul KWON , Seon Ho LEE , Yoon Gil CHOI , Chirl Soo SHIN

IPC分类号： C21D9/40 , F16C19/18 , C22C38/50 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D6/00 , C21D1/28 , C21D1/18

摘要： A bearing steel according to an embodiment of the present disclosure includes, as a chemical composition: 0.51 to 0.56 wt % of carbon (C); 0.30 to 0.55 wt % of silicon (Si); 0.60 to 0.90 wt % of manganese (Mn); 0.025 wt % or less (excluding 0 wt %) of phosphorus (P); 0.008 wt % or less (excluding 0 wt %) of sulfur (S); 0.01 to 0.20 wt % of chromium (Cr); 0.08 wt % or less (excluding 0 wt %) of molybdenum (Mo); 0.25 wt % or less (excluding 0 wt %) of nickel (Ni); 0.01 to 0.20 wt % of vanadium (V); 0.20 wt % or less (excluding 0 wt %) of copper (Cu); 0.003 wt % or less (excluding 0 wt %) of titanium (Ti); 0.01 to 0.05 wt % of aluminum (Al); 0.0015 wt % or less (excluding 0 wt %) of oxygen (O); 0.001 wt % or less (excluding 0 wt %) of calcium (Ca); and iron (Fe) and unavoidable impurities as a remainder.