Effect of Postdeformation Pause on Structure and Properties of Accelerated-Cooled Bearing Steel  Full text

L. A. Vakula¹, V. M. Krasnopolskiy¹, V. I. Fomin², I. V. Beketov²

¹ Ukrainian State Scientific and Engineering Center “Energostal”
10/14 Radishcheva St., office 318, Kyiv, 03680, Ukraine
² JSC “Oskolsky Electrometallurgical Works”
Staryy Oskol, Belgorod region, 309515, Russia

UDC 669.018.24:620.178

Metall. Min. Ind.,  2010, Vol. 2, No. 4, pp. 286-290

Abstract

Effect of pause between rolling end and start of accelerated cooling on microstructure and properties of bearing steel bar rolled on mill 350 at JSC “Oskolsky Electrometallurgical Works” is investigated. It is recommended to reduce the pause as much as possible. For this purpose the accelerated cooling unit should be placed on the minimum distance from the last stand and it is necessary to start cooling from the first section and use the last mill stand as finishing one.

Keywords: ACCELERATED COOLING, SELF-TEMPERING TEMPERATURE, MICROSTRUCTURE, CARBIDE NETWORK, GRAIN SIZE, HARDNESS