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:微主要包括微孔和夹杂,其中微孔由微气孔和微缩孔组成,夹杂物按
和尺寸分为团簇状夹杂、锥状夹杂、粒状夹杂、积聚物夹杂、丝状夹杂和
夹杂。