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2006年薄板坯连铸连轧国际研讨会

作者： LIU De-lu1 MAO Xin-ping2 NI Xiao-qing1 LI Lie-jun2 LOU Yan-zhi1 (1. School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China 2. Guangzhou Zhujiang Iron and Steel Co . Ltd Guangzhou 510730 China)

The microstructure and precipitation behavior of the carbonitride in low carbon ti-microalloyed steels produced by CSP process was studied by means of TEM and various techniques. The steels are consis

关键词： ti microalloyed steels EAF-CSP process interphase precipitation ti Carbonitrides

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Precipitation characteristic of high strength steels microalloyed with titanium produced by compact strip production

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Journal of University of Science and Technology Beijing 2008年第4期15卷 389-395页

作者： Jian Zhou Yonglin Kang Xinping Mao School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China CSP Institute for Technology Guangzhou Iron ＆ Steel Enterprises Group Guangzhou 510730 China

Transmission electron microscopy （TEM） and physics-chemical phase analysis were employed to investigate the precipitates in high strength steels microalloyed with ti produced by compact strip production （CSP）. It was seen that precipitates in ti microalloyed steels mainly included tiN, ti4C2S2, and tiC. The size of tiN particles varied from 50 to 500 nm, and they could precipitate during or before soaking. The ti4C2S2 with the size of 40-100 nm might precipitate before rolling, and the tiC particles with the size of 5-50 nm precipitated heterogeneously. High ti content would lead to the presence of bigger tiC particles that precipitated in austenite, and by contrast, tiC particles that precipitated in ferrite and the transformation of austenite to ferrite was smaller. They were less than 30 nm and mainly responsible for precipitate strengthening. It should be noted that the tiC particles in higher ti content were generally smaller than those in the steel with a lower ti content.

关键词： compact strip production (CSP) precipitation ti microalloyed steels nanometer particle

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