Quality control is necessary during every operation of the production process, including welding. It is only with sufficient control checks in place that you can expect to produce quality pieces that will meet the required performance standards and last a long time.
Welding defects are also quite common. Fortunately, with welding repairs, it is possible to correct these defects for a better output. Here are a few things to keep in mind with welding repairs
1. You Can Do Without Some Welding Repairs
Not every welding flaw has to be corrected. This is especially true if the defect, such as an imperfect shape and other superficial imperfection, falls within the acceptable limits as provided for during project design. Others, such as cracks, will have a profound effect on the performance of the finished products and affect their longevity. You have no option but to take care of such defects immediately.
2. Identify The Type And Cause Of The Defect
Rushing to do some welding repairs without analysing the type, root cause and extent of the defect can quickly become counterproductive. Was the defect a result of too much current? Did using the wrong size of electrode cause the welding defect? How deep into the weld does the defect extend?
Only by carefully analysing these parameters can you identify the right method to go about your welding repairs. Take, for example, surface and subsurface porosity resulting from the use of a backing bar made of a material that is different from the material of the workpiece. It is easy to make the mistake of using the same backing bar during welding repairs if you don't take the time to analyse the defects properly.
3. Always Use The Correct Technique
In the same way that some defects will be the result of neglecting to use the right techniques, working on welding repairs without considering the proper techniques may only cause more damage than good. If the repair requires, say, targeted grinding, applying the right technique will ensure that the surrounding area on the workpiece is not affected in the least during repairs. In extreme cases, you may be forced to do away with the workpiece and redo the fabrication process from scratch.
Avoiding welding defects in the first place is always the most ideal option. However, with the right knowledge, technique and equipment, you can expect excellent results from your welding repairs.