• 作者： 洪銘然;林世昌;程一麟; 何正行
• 作者服務機構： 國立成功大學礦冶及材料科學研究所;中國鋼鐵公司研究發展處
• 中文摘要： 低碳鋼板的超音波衰減，化學成分，肥來鐵晶徑，降伏強度，抗拉強度及延脆轉移溫度間獲得回歸式。降伏強度，抗拉強度及轉移溫度的相關係數及標準誤差各為 0.80，0.92，0.77 及 2.55 kg/m㎡，1.19 kg/m㎡，6.26°C。超音波衰減法的機械性質估計結果較金相法稍差，但不失為有力非破壞檢測法之一。
• 英文摘要： Regression equations were obtained among ultrasonic attenuation (10 MHz), chemical composition,ferrite grain size, yield strength, tensile strength and ductile-to-brittle transition temperatures for low car-bon steel plates. The correlation coefficients and standard errors were found to be 0.80, 0.92 and 0.77, and2.55 kg/m㎡, 1.19 kg/m㎡ and 6.260°C for yield strength, tensile strength and transition temperature, re-spectively．Ultrasonic attenuation provides an estimate of mechanical properties only slightly less accuratethan that of the metallographic technique and is thought to be a potent nondestructive method for pre-dicting the mechanical properties of commercial low carbon steel plates.
• 中文關鍵字： regression equation; ultrasonic attenuation; chemical composition; ferrite grain size; tensile and yield strength; ductile-to-brittle transition temperature
• 英文關鍵字： --