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23Co14Ni12Cr3MoE鋼奧氏體晶粒長大動力學
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更新時間：2015-04-18
利用顯微組織觀察和理論模型分析的方法, 研究了二次硬化型超高強度23Co14Ni12Cr3MoE鋼在800～1150 ℃之間的奧氏體晶粒長大動力學。
利用顯微組織觀察和理論模型分析的方法, 研究了二次硬化型超高強度23Co14Ni12Cr3MoE鋼在800～1150 ℃之間的奧氏體晶粒長大動力學。結果表明: 該鋼奧氏體平均晶粒尺寸隨著加熱溫度的升高和保溫時間的延長而增大, 其長大規(guī)律符合Beck方程, 奧氏體化溫度宜控制在850~950 ℃; 在800～1 150 ℃范圍內, 奧氏體晶粒長大指數(shù)隨加熱溫度的升高而逐漸增大, 晶粒長大平均激活能為256.62 kJ·mol-1, 并建立了該鋼在等溫加熱過程中的奧氏體晶粒長大動力學方程。
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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