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.

　
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  • 結果表明:微觀(guān)缺陷主要包括微孔和夾雜,其中微孔由微氣孔和微縮孔組成,夾雜物按形態(tài)和尺寸分為團簇狀夾雜、錐狀夾雜、粒狀夾雜、積聚物夾雜、絲狀夾雜和混合形夾雜。
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