Abstract Hot worked medium carbon steel wire, strip or bar is given a high elastic limit, good workability, freedom from surface tensile stresses, good stress corrosion resistance and low creep, by heating the steel prior to hot working, to a temperature such that the temperature immediately after hot working is 350*-500* C., while simultaneously imposing tension on the heated steel in the range between 15 percent of the tensile strength and the elastic limit, for a period of time not more than 10 seconds. Preferably, the steel is tensioned between the hot working mechanism such as a hot drawing die and an immediately preceding cold deformation mechanism such as a cold drawing die, the heat being applied by electric resistance between contact points constituted by the dies.
Inventors
👤 Willy Tournoy
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 10:21
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
A method as claimed in claim 1, and exerting said tension by means of said cold deformation.
Claim 2
Dependent Claim
31 words
A method as claimed in claim 1, in which said heating is effected by electric resistance through the workpiece by applying electrical contacts to two longitudinally spaced portions of the workpiece.
Claim 3
Dependent Claim
26 words
A method as claimed in claim 3, in which the cold deformation and hot reduction apparatuses are electrified to apply said electric current to the workpiece.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 1, in which said cold deformation and hot reduction are produced by drawing through dies.
Claim 5
Dependent Claim
33 words
A method as claimed in claim 5, in which said dies serve as electric contacts in sliding electrical contact with said workpiece thereby to apply said current to said workpiece between said dies.
Claim 6
Dependent Claim
22 words
A method as claimed in claim 1, in which said work-piece has a carbon content of 0.65 to 0.80 percent by weight.