焊接是许多工程结构制造和设计所采用的最普通的连接方式之一,并且也是最关键的工序之一,不仅要通过焊接工艺以及其返修工艺控制焊缝的显微组织和机械性能,而且焊接构件往往是结构中最薄弱的部位,因为焊缝可能带有裂纹或缺陷。这些缺陷是由于不适当的设计、制造厂工作质量不好或焊接工艺本身造成的。在大多数情况下,当发现不合格的焊接缺陷(如裂缝)时,通常最好的措施是及时进行返修。焊缝一般用批磨去除,然后进行重新焊接,如果第一次返修没 Welding is one of the most common connections used in the manufacture and design of many engineering structures and is also one of the most critical processes, not only controlling the microstructure and mechanical properties of the weld through the welding process and its rework process, but also welding Components tend to be the weakest part of the structure, as welds may have cracks or defects. These defects are due to improper design, poor quality of the work of the manufacturer or the welding process itself caused. In most cases, when unqualified welding defects (such as cracks) are found, it is usually best to rework in a timely manner. The weld is generally removed with a batch and then re-welded if not repaired for the first time