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.

结果表明:陷主要包括孔和杂,其中孔由气孔和缩孔组成,杂物按和尺寸分为团簇状杂、锥状杂、粒状杂、积聚物杂、丝状杂和混杂。