Features of this process have been demonstrated from the good characteristics and excellently even hardness of the sand mold, and low noise level detected.
以该法的砂型性能良好与砂型硬度高度均匀以及噪声测定水平，来显示此法的特色。
2
This kind of layer has high hardness and wear resistance, Application of sand sealing replaced mud sealing simplified operation and was favorable for layer quality.
这种渗层具有极高的硬度和耐磨性。试验采用的砂封法代替泥封法封箱，既简化了操作，又有利于渗层质量。
3
The results show that the strength and hardness of the mold produced by this method are much higher than those of normal sand mold, suitable for producing high precision thin wall castings.