On the Properties of High Strength Oil Tempered Carbon Steel Wire

Abstract

In this paper, we described the properties of high strength oil tempered wires that were manufactured by the new type furnace equipped with high frequency induction heater. High strength grade wires were obtained for commercial carbon steel and Si-Cr steel by the method of tempering at the low temperature.
The test results are as follows:
(1) In this new manufacturing process, wire is heated rapidly to austenitizing temperature and austenite grain size is controlled fine. Therefore, 195kgf/mm² grade high strength oil tempered carbon steel wire shows good mechanical properties.
(2) High strrength oil tempered carbon steel wire shows high fatigue strength and low residual shear strain in the clamping test at the room temperature. But, heat resitivity of this wire is less than that of Si-Cr steel oil tempered wire.
(3) The heat sensitivity of high strength oil tempered carbon steel wire is more than that of usual grade wire. Therefere, tempering temperature after coiling must be controlled more severely in the use of this wire.