Steering rack comprising steel bar with rack teeth

Details Steering rack comprising steel bar with rack teeth Steering rack comprising steel bar with rack teeth

2004-05-27

2010-02-16

Yee, Deborah (Department: 1793)

Metal treatment

Stock

Ferrous

C148S320000

Reexamination Certificate

active

07662245

ABSTRACT:
A steel bar for a steering rack that contains 0.50 to 0.60% by mass of C, 0.05 to 0.5% by mass of Si, 0.2 to 1.5% by mass of Mn, 0.0005 to 0.003% by mass of B, 0.005 to 0.05% by mass of Ti, 0.0005 to 0.1% by mass of Al, and 0.002 to 0.02% by mass of N is provided. Given D as a diameter of the steel bar, then the steel bar is adjusted in such a manner that quenched and tempered structures in a portion of the steel bar at a depth of D/4 from a surface satisfy conditions I), II), and III) as follows: I) a sum of a tempered bainitic structure and a tempered martensitic structure accounts for 30 to 100% in area percentage; II) a regenerated perlite structure accounts for 0 to 50% in area percentage; and III) a sum of the tempered bainitic structure, the tempered martensitic structure, and the regenerated perlite structure accounts for 50 to 100% in area percentage.

REFERENCES:
patent: 4765849 (1988-08-01), Roberts
patent: 5454883 (1995-10-01), Yoshie et al.
patent: 5473960 (1995-12-01), Sakamoto et al.
patent: 1069201 (2001-01-01), None
patent: 2345116 (2000-06-01), None
patent: 62-178472 (1987-08-01), None
patent: 62-180018 (1987-08-01), None
patent: 63-065020 (1988-03-01), None
patent: 4-254547 (1992-09-01), None
patent: 05-222450 (1993-08-01), None
patent: 07090484 (1995-04-01), None
patent: 9-25541 (1997-01-01), None
patent: 09287054 (1997-11-01), None
patent: 10-008136 (1998-01-01), None
patent: 10-8189 (1998-01-01), None
patent: 10195589 (1998-07-01), None
patent: 2000-153336 (2000-06-01), None
patent: 2001-79639 (2001-03-01), None
patent: 2003-166036 (2003-06-01), None

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