Growth behavior of ultrafine austenite grains in microalloyed steel
来源期刊：Acta Metallurgica Sinica2009年第1期
论文作者：Shengjie YAO Linniu DU Guodong WANG Xianghua LIU
Key words：Ultrafine austenite grain; Growth; Microalloyed steel; Second-phase particle;
Abstract: Ultrafine austenite grains (UFAGs) with size of 1-5 μm were prepared through repet-itive treatment, four times, of rapid heating and quenching, and the growth behaviors of these UFAGs during both the reheating and cooling stages were investigated. The results indicated that UFAGs without pinning particles appeared with significant coarsening when the reheating temperature reached 1000 °C. Although coarsening still occurred in the cooling stage, the growth was obscured during the isothermal holding process at temperatures between 900 °C and Ar3.
Shengjie YAO1，Linniu DU1，Guodong WANG1，Xianghua LIU1
(1.State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110004,China)
Abstract:Ultrafine austenite grains (UFAGs) with size of 1-5 μm were prepared through repet-itive treatment, four times, of rapid heating and quenching, and the growth behaviors of these UFAGs during both the reheating and cooling stages were investigated. The results indicated that UFAGs without pinning particles appeared with significant coarsening when the reheating temperature reached 1000 °C. Although coarsening still occurred in the cooling stage, the growth was obscured during the isothermal holding process at temperatures between 900 °C and Ar3.
Key words:Ultrafine austenite grain; Growth; Microalloyed steel; Second-phase particle;
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