High strength bolt superior in delayed fracture resistant...

Details High strength bolt superior in delayed fracture resistant... High strength bolt superior in delayed fracture resistant...

2006-07-04

2006-07-04

Yee, Deborah (Department: 1742)

Metal treatment

Stock

Ferrous

C148S334000, C148S335000, C470S017000

Reexamination Certificate

active

07070664

ABSTRACT:
A high strength bold superior in delayed fracture resistant property has a bolt tensile strength of 1200 N/mm2. A high strength bolt comprised of a head portion and shaft portion formed by a steel material, wherein the relation between a bolt tensile strength TS (N/mm2) and tempering temperature T (° C.) satisfies the following expression (1), the relation between the bolt tensile strength TS (N/mm2) and the carbon equivalent Ceq(%) calculated from the chemical composition of the steel material used for the high strength bolt satisfies the following expression (2), and the tensile strength of the bolt is refined to a range of 1200 N/mm2to 1600 N/mm2by quenching and tempering:in-line-formulae description="In-line Formulae" end="lead"?TS≦1.1T+850  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?TS≦550Ceq+1000  (2)in-line-formulae description="In-line Formulae" end="tail"?where,Ceq=C+(Mn/6)+(Si/24)+(Ni/40)+(Cr/5)+(Mo/4)+(V/14).

REFERENCES:
patent: 61-130456 (1986-06-01), None
patent: 64-52045 (1989-02-01), None
patent: 1-191762 (1989-08-01), None
patent: 2-267243 (1990-11-01), None
patent: 3-6352 (1991-01-01), None
patent: 3-173745 (1991-07-01), None
patent: 3-229009 (1991-10-01), None
patent: 4-29607 (1992-01-01), None
patent: 5-9653 (1993-01-01), None
patent: 5-70890 (1993-03-01), None
patent: 6-89768 (1994-11-01), None
patent: 7-126799 (1995-05-01), None
patent: 7-278735 (1995-10-01), None
patent: 8-225845 (1996-09-01), None
patent: 2000-328191 (2000-11-01), None
patent: 2001-62639 (2001-03-01), None
patent: 2001-288538 (2004-10-01), None
patent: WO 00/18975 (2000-04-01), None

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