公开(公告)号：US11821465B2

公开(公告)日：2023-11-21

申请号：US17673942

申请日：2022-02-17

申请人： AKTIEBOLAGET SKF

发明人： Feizhou Zhang ,  Staffan Larsson

IPC分类号： F16C33/62 ,  F16C33/34 ,  C21D9/38

CPC分类号： F16C33/62 ,  C21D9/38 ,  F16C33/34 ,  F16C2204/72 ,  F16C2223/12 ,  F16C2223/16

摘要： An inner ring or and outer ring for a roller bearing includes: 0.30-0.45 wt. % carbon, 0.1-0.7 wt. % silicon, 0.6-0.9 wt. % manganese, 0.9-1.2 wt. % chromium, 0.15-0.7 wt. % molybdenum, 0-2.0 wt. % nickel, 0-0.02 wt. % phosphorus, and 0-0.02 wt. % sulfur, the balance being iron and unavoidable impurities. The microstructure of the steel composition contains bainite, and a carbonitrided case layer is provided on a surface of the inner ring or outer ring.

公开(公告)号：US20220268315A1

公开(公告)日：2022-08-25

申请号：US17673942

申请日：2022-02-17

申请人： AKTIEBOLAGET SKF

发明人： Feizhou Zhang ,  Staffan Larsson

IPC分类号： F16C33/62 ,  F16C33/34 ,  C21D9/38

摘要： An inner ring or and outer ring for a roller bearing includes: 0.30-0.45 wt. % carbon, 0.1-0.7 wt. % silicon, 0.6-0.9 wt. % manganese, 0.9-1.2 wt. % chromium, 0.15-0.7 wt. % molybdenum, 0-2.0 wt. % nickel, 0-0.02 wt. % phosphorus, and 0 -0.02 wt. % sulfur, the balance being iron and unavoidable impurities. The microstructure of the steel composition contains bainite, and a carbonitrided case layer is provided on a surface of the inner ring or outer ring.

公开(公告)号：US20230147672A1

公开(公告)日：2023-05-11

申请号：US17962476

申请日：2022-10-08

申请人： Aktiebolaget SKF ,  SKF (China) Co Ltd

发明人： Feizhou Zhang ,  Meng Zhang ,  Ming Li ,  Yunfeng Song ,  Ping Huang ,  Karl Åke Staffan Larsson

IPC分类号： C21D6/00 ,  C22C38/18 ,  C22C38/02 ,  C21D9/40

CPC分类号： C21D6/008 ,  C22C38/18 ,  C22C38/02 ,  C21D6/005 ,  C21D6/002 ,  C21D9/40 ,  C21D2211/001

摘要： The invention provides a heat treatment method for a steel product. The steel product includes at least 0.5-0.7% of Si by weight; the method provides the following steps: step 1) putting the steel product under an Austenitizing temperature of 830-890° C. and lasting for a first time to Austenitize the steel product, step 2) immersing the Austenitized steel product in a salt bath at an isothermal temperature of 200-350° C. and lasting for the second time. The method of the invention improves the toughness and elongation of the steel product, keeps the wear resistance of the product, and can be well applied to the fields of thin section ring of bearings and the like. The invention also provides a steel product and a bearing ring.