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液化裂纹是一种沿奥氏体晶界开裂的微裂纹,尺寸很小一般在0.5mm以下,尽管尺寸很小,却是冷裂纹、再热裂纹、脆性破坏和疲劳断裂的发源地。
The liquefied crack is a kind of micro-crack which cracks along the austenite grain boundary. The size of the liquefied crack is usually below 0.5mm. Although the size is small, it is the cradle of cold crack, reheat crack, brittle fracture and fatigue fracture.