Process for forming a prestress anchorage by drawing a steel sle

Details Process for forming a prestress anchorage by drawing a steel sle Process for forming a prestress anchorage by drawing a steel sle

1984-07-03

1985-12-24

Moon, Charlie T.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

24129W, 29452, 29520, 148 39, 148152, 403282, C21D 110, C21D 140, C21D 142

Patent

active

045604240

ABSTRACT:
A process for forming a prestressed anchorage by drawing a steel sleeve over a metal core of elongate shape having a substantially round section, consisting in using a sleeve having an inner diameter substantially equal to the outer diameter of the metal core, in forming a grooved portion or indentations in the inner cylindrical surface of the sleeve, in subjecting the inner cylindrical surface of the sleeve and its grooving to surface heat treatment adapted to increase the hardness thereof and to give thereto a value greater than that of the metal core, by causing the tempering depth to increase from one end to the other of the sleeve and in anchoring the sleeve on the metal core, in a way known per se, by drawing the sleeve through a draw-plate.

REFERENCES:
patent: 2256455 (1941-09-01), Crawford
patent: 2315558 (1943-04-01), Somes
patent: 2357733 (1944-09-01), Guderian
patent: 2375481 (1945-05-01), Lee et al.
patent: 2604419 (1952-07-01), Herbenar
patent: 2638367 (1953-05-01), Bergan
patent: 2832118 (1958-04-01), Ehmann
patent: 3559270 (1971-02-01), Beghi
patent: 3583060 (1971-06-01), Sigmans
patent: 3748723 (1973-07-01), Tomioka
patent: 4261769 (1981-04-01), Usui

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