Why is the weldability of pig iron poor?
It is not difficult to weld iron carbon steel welding rod, but, once the welding problems, especially to burst, basically announced the workpiece scrapped. If the crack is parallel to the weld cracking, the general can still re welding repair, but there are many perpendicular to the weld crack.
The best choice for cast iron welding, welding, cold welding directly on the line, the cast iron electrode is good, as long as no welding, or basically can guarantee success. Our company has been welding the cast iron for more than 10 years and basically no problems have occurred. Welding materials for you to introduce several of our regular use, MG289, MG210, key valuable equipment, but also the use of M777 welding rod. However, if you a burst, I suggest you give up, mainly because it is difficult to clean the crack.
1. from the chemical composition, the carbon content of steel is less than 2.11%; pig iron is greater than 2.11%2., from the performance point of view, pig iron crisp, steel, no pig iron brittle3., from the organization point of view, cast iron in the structure of Levin, there is no steel in the Levin body.
