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23Co14Ni12Cr3MoE钢奥氏体晶粒长大动力学
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-04-18
利用显微组织观察和理论模型分析的方法, 研究了二次硬化型超高强度23Co14Ni12Cr3MoE钢在800～1150 ℃之间的奥氏体晶粒长大动力学。
利用显微组织观察和理论模型分析的方法, 研究了二次硬化型超高强度23Co14Ni12Cr3MoE钢在800～1150 ℃之间的奥氏体晶粒长大动力学。结果表明: 该钢奥氏体平均晶粒尺寸随着加热温度的升高和保温时间的延长而增大, 其长大规律符合Beck方程, 奥氏体化温度宜控制在850~950 ℃; 在800～1 150 ℃范围内, 奥氏体晶粒长大指数随加热温度的升高而逐渐增大, 晶粒长大平均激活能为256.62 kJ·mol-1, 并建立了该钢在等温加热过程中的奥氏体晶粒长大动力学方程。
The kinetics of austenite grain growth in the ultra-high strength steel 23Co14Ni12Cr3MoE, was investigated by microstructure observation and theoretic model analysis at 800-1 150 ℃. The results indicate that the average austenite grain size of the steel increased when the heating temperature increased and the holding time prolonged. And the growth of austenite grain followed the Beck′s equation. The best austenitizing temperature should be controlled in 850-950 ℃. The grain growth exponent increased gradually with the increase of heating temperature, and the average activation energy was 256.62 kJ·mol-1 in the temperature range of 800-1 150 ℃. The equation of austenite grain growth for 23Co14Ni12Cr3MoE steel in isothemal heating process was established.
The kinetics of austenite grain growth in the ultra-high strength steel 23Co14Ni12Cr3MoE, was investigated by microstructure observation and theoretic model analysis at 800-1 150 ℃. The results indicate that the average austenite grain size of the steel increased when the heating temperature increased and the holding time prolonged. And the growth of austenite grain followed the Beck′s equation. The best austenitizing temperature should be controlled in 850-950 ℃. The grain growth exponent increased gradually with the increase of heating temperature, and the average activation energy was 256.62 kJ·mol-1 in the temperature range of 800-1 150 ℃. The equation of austenite grain growth for 23Co14Ni12Cr3MoE steel in isothemal heating process was established.
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