Method for the manufacture of a spring band clip

Details Method for the manufacture of a spring band clip Method for the manufacture of a spring band clip

1996-10-09

1998-11-03

Ip, Sikyin

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148578, 148567, 148568, 148625, 148636, 148645, 148286, C21D 902, C22C 3822

Patent

active

058302905

ABSTRACT:
The subject invention provides a method for manufacturing a spring band clip, wherein an alloyed steel is shaped, annealed, levelled into a narrow band, then shaped by stamping and bending into a non-machined clip, and the surface of the non-machined clip is smoothed and treated to produce resistance to corrosion; wherein the steel comprises iron as the main component and one or more of the following components by weight: 0.32 to 0.55% C; up to 2.0% Si; up to 2.0% Mn; up to 0.04% P; up to 0.04% S; 17.5 to 20% Cr; up to 1% Ni; 0.5 to 2.5% Mo; up to 0.5% V; up to 0.1% Al; up to 0.1% Co; up to 0.4% Cu; up to 0.4% Pb; up to 0.1% Se; up to 0.1% Te; up to 0.005% Ti; up to 0.1% W; up to 0.05% Zr; up to 0.01% O.sub.2 ; up to 0.01% N; up to 0.1% Bi; up to 0.001% B; up to 0.05% Nb; wherein the non-machined clip is austenitized prior to being smoothed and is converted into martensite by heat treatment in a salt-, oil-, or water bath, or by quenching at about the austenitizing temperature. The subject method of manufacture affords a product with good corrosion resistance, sufficient mechanical strength and spring capacity, while avoiding the need for an anti-corrosion coating which is harmful to the environment.

REFERENCES:
patent: 3691601 (1972-09-01), Hough
patent: 4148699 (1979-04-01), Mayer et al.
patent: 4846904 (1989-07-01), Arai et al.
patent: 5186768 (1993-02-01), Nomoto et al.

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