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杂,其中微孔由微气孔和微缩孔组成,杂态和尺分为团杂、锥杂、粒杂、积聚杂、丝杂和混合杂。