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减少铸造绽内的晶粒长大现象用真空自耗电孤法冶炼的金属,大都在铸成锭子时;有柱状晶粒成长。柱晶方向垂直于凝固面。此种现象在浇铸纯钼、铌及钒时给铸造和挤压操作造成很大困难。在浇铸各种合金时又有柱状偏析发生。电机转子用钢鍜件的内部有硫及其它元素在柱状晶粒的表面及末端析出,使得鍜件内部有大量杂质密集。应用超声波可以使小型铸件晶粒变小。重量在22.6公斤以下的铸钢件,或者1吨重的鍜造钢锭,应用超声波均获得良好结果。0.453公斤钢大约需要200～2500瓦特的动力;这表示1087公斤的钢锭需要几十万千瓦的动力。
Reduce the growth of the phenomenon of grain growth in the casting bloom Vacuum self-consumable method of smelting metal, mostly cast into the spindle; have columnar grain growth. Columnar direction perpendicular to the solidification surface. This phenomenon causes great difficulties in casting and extrusion operations when casting pure molybdenum, niobium and vanadium. Columnar segregation occurs when casting various alloys. Inside the steel rotor of the motor rotor, sulfur and other elements are precipitated on the surface and end of the columnar crystal, so that a large amount of impurities are dense inside the silicon rotor. Ultrasound can make smaller castings smaller grains. Castings of steel weighing less than 22.6 kg, or 1 ton heavy ingot steel ingot, all achieved good results with ultrasonic waves. 0.453 kilograms of steel requires about 200 to 2500 watts of power; this means that 1087 kilograms of ingots need hundreds of thousands of kilowatts of power.