stereoscan

The pattern of fracture by impact penetration test and tensile fatigue test of thermite welding with stereoscan was observed,and the component of defect with energy spectrum was analyed.

微观缺陷主要包括微孔和夹杂,其中微孔由微气孔和微缩孔组成,夹杂物和尺分为夹杂、锥夹杂、粒夹杂、积聚物夹杂、丝夹杂和混合夹杂。