一、缺陷类型在许多文献资料中,对焊接出现的种种缺陷、产生原因以及预防方法,都曾作过叙述与研究,本文只着重剖析其中几个严重影响焊接接头性能的缺陷,而对其它一般问题则不涉及。大家知道,焊缝中的缺陷导致了焊缝本身的不连续性,从而降低了焊接接头的许用应力。这里所说的“不连续性”,并不完全是指接缝金相组织的变化,而是指焊缝内部存在的某种“中断”。这种中断所处的位置、大小及方向、对接头性能的影响很大,特别是当它的方向与主应力的方向相垂直 First, the type of defect In many literature, the welding defects, causes and prevention methods have been described and studied, this article focuses only on the analysis of several serious defects that affect the performance of welded joints, and other general The problem is not involved. As we all know, defects in the weld led to the discontinuity of the weld itself, thereby reducing the allowable stress of the welded joint. The term “discontinuity” referred to here does not refer entirely to changes in the microstructure of the joint, but rather to some kind of “interruption” within the weld. The location, size and direction of such an interruption can have a significant effect on the performance of the joint, especially if its orientation is perpendicular to the principal stress