Title:
METHOD FOR IMPROVING FATIGUE RESISTANCE OF HOLLOW CYLINDRICAL PARTS MADE OF STEEL
Document Type and Number:
Japanese Patent JP3881921
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method improving fatigue resistance of hollow cylindrical parts made of steel such as rollers for roller chains having hardness of HRC ≥45.
SOLUTION: The fatigue resistance of the hollow cylindrical parts made of steel is improved by passing a tool 8 having a spherical surface 7 of a diameter D3 greater than the inner diameter D1 of a pore section 9 of the hollow cylindrical parts 6 made of steel having the hardness of HRC ≥45 into this hole section 9 and expanding the external diameter D2 to ≥0.2%.
Inventors:
Akira Fujiwara
Hidemi Arai
Yasuhiro Kawamura
Ichiro Hara
Hidemi Arai
Yasuhiro Kawamura
Ichiro Hara
Application Number:
JP2002086520A
Publication Date:
February 14, 2007
Filing Date:
March 26, 2002
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
C21D7/02; C21D7/12; B21D39/14; (IPC1-7): C21D7/12
Domestic Patent References:
| JP10078088A | ||||
| JP62297414A | ||||
| JP54001030U | ||||
| JP59093827A | ||||
| JP2001508144A |
Attorney, Agent or Firm:
Ken Ochiai
Kazuaki Niki
Kazuaki Niki