In welding, as in any type of manufacturing, defects can be a common occurrence. The process of welding can create anomalies and deviations that are caused by incorrect welding processes and techniques. Understanding weld cracks, the most common of these issues, can help to correct them before they cause more significant problems that require more extensive remedies.
Perhaps the most serious of all welding defects is a weld crack. Weld cracks can occur on the surface, in the actual weld metal, and on the area exposed to the intense heat of the torch. Depending on the heat level in which these cracks occur, three types can be problematic.
Hot cracks happen during the process of welding or the operation of crystallization of the weld joint. Cold cracks appear after the weld has cooled completely and the metal temperature has stabilized. These cracks can form any time after welding is complete and typically are seen in welded steel. Finally, crater cracks occur while the welder completes a pass on the weld joint. The weld pool cools and solidifies, then shrinks to form a gap.
How Cracks Form
There are a variety of elements that are involved in weld crack formations. Use of hydrogen incorrectly, base metal contamination and inadequate joint design are among the top reasons weld cracks develop. Welders who begin welding without properly preheating in advance or who weld at high speeds with low current can anticipate cracks forming in their work. The problem can also lie with the material itself. High contents of sulfur and carbon in metal will also make the weld more tedious and easy to crack.
Avoiding Crack & Crack Remedies
Proper techniques and preparations always help keep the formation of weld cracks to a minimum. Preheating metal as required, adequate cooling of the weld area once completed, and displaying proper joint design will ensure that the weld is laid correctly. Using appropriate metal and welding speed for the amperage current also lowers the chances of cracks forming later.
Importance Of Experience
While there are many types of welding issues and reasons that they happen, cracks can be curtailed using experienced and professional welders. If a weld starts on the wrong foot, it will be problematic until corrected. Welds are meant to fuse two metal parts; they should be firm and stable to maintain the structure’s integrity. Poor welds can be unsightly at best and dangerous at worst. Don’t trust your weld to anyone but Epic Welding Inc., where quality is our top priority. Call Epic Welding LLC. Today to take care of all your welding needs safely and professionally.