Oil-tempered wire and method of manufacturing the same

Details Oil-tempered wire and method of manufacturing the same Oil-tempered wire and method of manufacturing the same

1996-06-21

1999-05-18

Zimmerman, John J.

Metal treatment

Stock

Ferrous

420105, 428544, 148663, B21F21/00

Patent

active

059047879

ABSTRACT:
A high-toughness, quenched, oil-tempered wire for springs which is less likely to suffer a permanent set and is high in strength and toughness. The wire is made of a steel containing predetermined amounts of C, Si, Mn, Al and Ti, to which are selectively added predetermined amounts of V, Mo, W and Nb. After quenching and tempering, the content of retained austenite is 1-5 vol. %, and/or the number of carbides having a diameter of 0.05 .mu.m or more is 5 or less per .mu.m.sup.2 as viewed on a transmission electron microscope image.

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Patent Abstracts of Japan, Publication No. 59096246 A, Steel Wire for Cold Formed Spring of Extra High Strength Its Production and Cold Formed Spring of Extra High Strength Obtained from Said Steel Wire, Publication Date Jun. 2, 1984.
Patent Abstracts of Japan, Publication No. 03162550 A, High Strength and High Ductility Oil Tempered Steel Wire and Its Manufacture, Publication Date Jul. 12, 1991.

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