Title:
STEEL WIRE OR ROD SUPERIOR IN WIRE DRAWABILITY CAPABLE OF OMITTING HEAT TREATMENT PRIOR TO WIRE DRAWING, AND BEARING PARTS
Document Type and Number:
Japanese Patent JP3949926
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a steel wire or rod which has excellent wire drawability as in hot-rolled state, even when heat treatment such as spheroidizing annealing is omitted, and provide bearing parts obtained from the steel wire or rod.
SOLUTION: The steel wire or rod includes 0.8-1.3% C (by mass%, hereafter), and has 10 or less of an aspect ratio (a ratio of a major axis to a minor axis) of pro-eutectoid cementites, 2 μm or less of the minor axes, and 20 μm or less of the average size of an enclosed region by the pro-eutectoid cementite.
Inventors:
Masataka Shimotsuka
Onoe Yoshinori
Onoe Yoshinori
Application Number:
JP2001318539A
Publication Date:
July 25, 2007
Filing Date:
October 16, 2001
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
B21B1/16; C22C38/00; B21B3/00; C21D8/06; C22C38/04; C22C38/38; (IPC1-7): C22C38/00; B21B1/16; B21B3/00; C21D8/06; C22C38/04; C22C38/38
Domestic Patent References:
| JP10212528A |
Attorney, Agent or Firm:
Kyuichi Ueki
Etsushi Kotani
Etsushi Kotani