Process for the manufacture of a high strength chain and the pro

Details Process for the manufacture of a high strength chain and the pro Process for the manufacture of a high strength chain and the pro

1975-12-22

1977-01-11

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

59 35R, 59 78, 59 84, 75126B, 148 12B, 148 12F, 148 36, 148127, C21D 900

Patent

active

040025098

ABSTRACT:
The invention relates to a process for the manufacture of a chain having an ultimate tensile strength of at least 90 kg/mm.sup.2 and an impact strength at .+-. 0.degree. C of at least 2.8 kgm starting from a steel ingot containing C, Si, Mn, Cr, Mo, N, Al, Nb (Cb), and Fe in certain amounts, said ingot being hot rolled to a rod of a dimension suitable for use in a chain, cut into pieces of adjusted length and after resistance heating to 700.degree.-900.degree. C said pieces being bent and flash-butt welded to connected links of a chain, said chain being then normalized by heating to a temperature of 700.degree.-900.degree. C and then cooled in air. The invention also covers chains prepared by the process.

REFERENCES:
patent: 3124929 (1964-03-01), Kito et al.
patent: 3674570 (1972-07-01), Hallstrom
patent: 3899368 (1975-08-01), Waid

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