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
和
杂,其中
气
和
缩
组成,
杂物按形态和尺寸分
团簇
杂、锥
杂、粒
杂、积聚物
杂、
杂和混合形
杂。