积聚物

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.

观缺陷主要包括孔夹杂,其中孔由气孔孔组成,夹杂按形态尺寸分团簇状夹杂、锥状夹杂、粒状夹杂、夹杂、丝状夹杂混合形夹杂。