Title:
高強度ドライブシャフトとその製造方法
Document Type and Number:
Japanese Patent JP4219023
Kind Code:
B2
Abstract:
Disclosed are a high strength drive shaft and a process for producing the same. The high strength drive shaft comprises as a steel material, by weight, carbon: 0.48 to 0.58%, silicon: 0.01 to 0.15%, manganese: 0.35 to 0.75%, sulfur: 0.005 to 0.15%, molybdenum: 0.1 to 0.35%, boron 0.0005 to 0.005%, aluminum: 0.015 to 0.05%, and titanium: 0.02 to 0.08%, the proportion of the effective case depth of an involute serration in its end of the drive shaft being 0.3 to 0.7 in terms of the ratio of the effective case depth t to the radius r, t/r. The involute serration in its end preferably has a former austenite grain size of not less than 8 in terms of the grain size number specified in JIS (Japanese Industrial Standards). A steel comprising the above constituents and having a hardness of 85 to 95 HRB is machined and form rolled into a shaft, and the shaft is induction hardened and then tempered at 120 to 200° C. to produce the high strength drive shaft.
Inventors:
Tatsuro Ochi
Hideo Kanizawa
Kenichiro Naito
Tamura Joji
Masayoshi Saga
Hideo Kanizawa
Kenichiro Naito
Tamura Joji
Masayoshi Saga
Application Number:
JP34485298A
Publication Date:
February 04, 2009
Filing Date:
November 19, 1998
Export Citation:
Assignee:
Nippon Steel Corporation
Honda motor industry stock company
Honda motor industry stock company
International Classes:
F16C3/02; C21D9/28; C22C38/00; C22C38/22; C22C38/28; C22C38/32; C22C38/60; F16D1/00; C21D1/10
Domestic Patent References:
| JP5320825A | ||||
| JP4141521A | ||||
| JP9280262A | ||||
| JP10195589A |
Attorney, Agent or Firm:
Nobuyuki Hayashi
Yasuhiko
Yasuhiro Hagiwara
Yasuhiko
Yasuhiro Hagiwara