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由于鑄铁的可焊性不良,容易在焊接中产生白口区域和开裂,一般鑄件热焊时需将被焊工件預热到一定温度(650～700℃),并在整个焊接时間內要?终飧鑫露取5笮驮O备的鑄鉄件发生裂紋需焊接时,往往由于尺寸龐大,受到条件所限,不能使鑄件全部均匀地預热。我厂500公斤空气錘錘身和底板在凸緣部分发現裂縫共四处,裂縫最长处有400毫米,最短处达100毫米,并且开裂处已透穿。錘身和底板材料是鑄鉄,經化
Due to the poor weldability of cast iron, it is easy to produce white areas and cracking in the welding. In general, when the castings are hot welded, the workpiece to be welded should be preheated to a certain temperature (650-700 ° C) and welded throughout the welding time终 Xin Xin Lu take 5 笮 O pack O prepared pieces of castings crack, welding is often due to the size of large, subject to conditions, can not make the casting all preheat evenly. 500 kilograms of air hammer hammer body and the floor in our factory found a total of four cracks in the flange part, the longest crack 400 mm, the shortest at 100 mm, and cracking has been through. Hammer body and floor material is cast 鉄, by the chemical