The reason of the Weld Joint Cracking on high frequency welding pipe was investigated by using macroscopic observation, metallographic technology, fracture analysis and EBSD technology.
本文通过使用宏观观察、金相分析、断口分析和电子背散射衍射（EBSD）等分析手段对高频焊管焊后弯管开裂的原因进行了分析。
After that the computer image processing technology is used to carry on binary processing for metallographic image, tracking arithmetic makes accurate calculation of individual grain area very easy.
运用计算机图像处理技术对金相图像进行二值化处理后，采用图像跟踪算法可使单个晶粒面积的精确求取变得十分容易。
Metallography detection is a technology that studies about the relationship between the structure and the performance of metal material based on the metallographic theory.
以金相学理论基础，金相检测是一种用于研究金属材料内部结构组织与材料性能之间关系的检测技术。
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