层状裂纹是7003铝合金挤压材料对焊接头中最主要的缺陷之一。
Lamellar tearing is one of the main defects in flash-butt welded joint of Al—Zn—Mgallog type 7003.
这种方法不仅容易在锻件心部产生层状裂纹，而且浪费了大量原材料和加工工时。
This method frequently caused the layer-shaped cracks in the center of the forgings, and also wasted a large number of the raw materials and working hours.
结果表明：等离子喷涂硅灰石涂层具有粗糙的表面和层状结构，涂层内部存在一些气孔和微裂纹。
The results indicate that the plasma sprayed wollastonite coating has a rough surface and lamellar structure including some pores and microcracks.
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