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:微观缺包括微孔
夹
,其中微孔由微气孔
微缩孔组成,夹
物按形
尺寸分为团簇状夹
、锥状夹
、粒状夹
、积聚物夹
、丝状夹
合形夹
。