Ultrasonic flaw detection in large-grained materials is difficult because of multiple scattering from material microstructure (grain noise).
由于粗晶材料中材料微结构引起的散射(结构噪声)，使得超声探伤比较困难。
Through test analysis, we found that it is caused by the large size grain in this section, as well as the structure stress in this section over the material strength.
经试验分析是由于该段晶粒粗大，淬火时组织应力超过该段的材料强度所致。
The invention not only has quite good drying effect to materials with heavy viscosity and large grain size, but also has no phenomenon of sticky material clogging.
本发明不仅对粘性大、粒度大的物料具有较好的烘干效果，而且不会发生物料粘结堵料的现象。
The invention not only has quite good drying effect to materials with heavy viscosity and large grain size, but also has no phenomenon of sticky material clogging.
本发明不仅对粘性大、粒度大的物料具有较好的烘干效果，而且不会发生物料粘结堵料的现象。
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