铝合金超声铸造；超声波电源；频率控制；功率控制。

Aluminum ultrasound casting; ultrasound power; frequency tracking; power control.

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采用对所研制的粘结剂进行超声波振荡及混砂时加入有机高聚物yppj对铝镁硼复合磷酸盐铸造粘结剂热硬砂进行改性。

The heat cured sand of Al-Mg-B compound phosphate inorganic binder was modified by ultrasonic oscillation to binder and adding organic polymer YPPJ while mixing of sand.

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分析了汽轮机厚断面球铁件轴承座的设计特点、铸造技术和超声波探伤。

The design characteristics, foundry technology and ultrasonic test method of heavy section ductile iron bearings for steam turbines was described and analyzed.

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