Materials Transactions Online

Materials Transactions, Vol.58 No.02 (2017) pp.196-205
© 2017 The Japan Institute of Metals and Materials

Effect of Carbon Content on Static Recrystallization Behavior of Work-Hardened Austenite in Low Alloy Steel and Its Mechanism

Manabu Kubota1, Yukiko Kobayashi2, Kohsaku Ushioda3 and Jun Takahashi2

1Steel Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, Amagasaki 660-0891, Japan
2Advanced Technology Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, Futtsu 293-8511, Japan
3Technical Development Bureau, Nippon Steel & Sumitomo Metal Corporation, Futtsu 293-8511, Japan

Many studies have investigated the effect of alloying elements on the recrystallization behavior of work-hardened austenite. However, the recrystallization behavior of high carbon low alloy steel has not yet been systematically investigated. In this study, the effects of alloying elements, focusing on the carbon content, are examined by means of a double-hit compression test. The following conclusions were obtained:

(1) An independent effect of carbon content on the recrystallization behavior is not recognized.

(2) The effects of the Nb, Ti, and V additions on inhibiting recrystallization are amplified when the carbon content is increased from 0.1% to 0.55%.

(3) The carbon content dependency of the effects of the Nb and Ti addition on recrystallization becomes weaker when the deformation and holding temperature becomes lower.

(4) C-V complexes or very fine VC clusters are considered to be responsible for an inhibiting recovery and recrystallization of 0.55%C-0.1%V steel, which shows a very strong inhibition effect.

This Paper was Originally Published in Japanese in J. Japan Inst. Met. Mater. 80 (2016) 630-639.

[doi:10.2320/matertrans.M2016344]

(Received 2016/09/28; Accepted 2016/11/25; Published 2017/01/25)

Keywords: recrystallization, low alloy steel, high carbon steel, ausforming, alloying element

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