耐低溫衝擊性能之厚壁球墨鑄鐵之研發

Study on the Production of Heavy Section Ductile Irons with Specified Low Temperature Impact Property

蘇子銘(Tzu-Ming Su) ； 張瑞模(Re-Mo Chang) ； 潘永寧(Yung-Ning Pan)

《鑄造工程學刊》 37卷2期 (2011/06) Pp. 17-28

https://doi.org/10.29809/JTFS.201106.0003

摘要

本研究針對大型風力發電機之關鍵零組件，探討化學成分及熔鑄條件（球化、接種、澆鑄時間及溫度等）對於顯微組織（球化率、球墨數、波來鐵含量）及機械性質（抗拉強度、降伏強度、伸長率、低溫衝擊性能）的影響，以建立符合各種不同材質規格之合金設計及最佳熔鑄條件。此外，本研究以迴歸分析的方法，建立化學成分、顯微組織與機械性質之相關性迴歸方程式。此相關性迴歸方程式可針對不同規格要求的鑄件，提供最佳之合金設計及顯微組織，此外，亦可以由化學成分及顯微組織依據特定之迴歸方程式來預測鑄件之各項機械性質。

關鍵字

大型風力發電機 ； 球墨鑄鐵 ； 拉伸性質 ； 低溫衝擊強度 ； 合金設計

並列摘要

The primary purpose of this research is to investigate the effects of chemical compositions and selected processing parameters, including nodularization treatment, post inoculation, pouring time and pouring temperature, on microstructures (nodularity, nodule count and pearlite percentage) and mechanical properties (tensile strength, yield strength, elongation and low temperature impact value) of key cast components used in large-scale windmills. This study has established the optimal alloy design and process conditions for different targeted castings. In addition, regression analysis had been performed to correlate the mechanical properties with chemical compositions and microstructures. The attained regression equations can be used to obtain the appropriate alloy design for castings with specified specification. Furthermore, by employing these regression equations, the mechanical properties can be predicted based upon the chemical composition and microstructure.

並列關鍵字

Large-scale windmill ； ductile cast iron ； alloy design ； tensile property ； impact property