超声施振温度和浇注角度对A356半固态组织的影响
Effects of Temperature in Ultrasonic Vibration and Pouring Angle on Structure of Semi-solid A356 Alloy
方 敏, 王家宣, 李文杰, 罗贻正
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作者单位：（南昌航空大学 航空制造工程学院，江西 南昌 330063）
中文关键字：超声波； A356合金； 晶粒； 细化
英文关键字：ultrasonic; A356 alloy; grain; refinement
中文摘要：通过施加试验研究了超声波施振温度和处理角度对A356合金半固态组织细化规律的影响。结果表明，在不施加超声波的情况下，斜浇道对A356半固态组织有较好的细化作用。经超声处理后，晶粒细化效果明显，且在不同的施振温度下，A356半固态组织有不同程度的细化。随着施振温度的升高，细化作用越好，但当温度提高到一定程度时，细化效果减弱。施振温度为660 ℃时，晶粒最细小。
英文摘要：The effects of temperature in ultrasonic vibration and pouring angle on the refinement of semi-solid A356 grain were studied. The results show that, without power ultrasound, the effect of oblique runner on the refinement of semi-solid A356 is significant. The structures of semi-solid A356 alloy are remarkably refined by ultrasonic treatment, and the structure refining effects are diverse at different temperature. The structure refinement improves with the increase of temperature, but over a certain temperature, the effect of refining grains decreases. When the vibration temperature is 660 ℃, the grain is smallest.