For some cranes with simple structure, large load, high strength requirements and small batch size, the ultra-large reducer is generally used with welded box. In order to ensure the welding strength and reduce the welding deformation, when the box is welded, Need to pay attention to some problems to ensure the quality of the box welding. 1. Box material selection Taking the figure box as an example, because a significant application characteristic of such a box is complicated working conditions and large load, the strength requirement is high, and at the same time, in order to ensure the welding quality and effect, the carbon equivalent of the material is not required to be too High, in order to improve the weldability of the material as much as possible; in addition, the cost factor should be considered. Therefore, in the material selection, the material of the reducer housing body should be selected from low-carbon structural steel such as Q345B, and the bearing seat material can be ZG310-570. The welding process can basically meet the welding requirements of the reducer. 2. Precautions when welding Because the welding of the reducer involves the welding of the main material Q345B and the welding of Q345B and ZG310-570 dissimilar materials, and at the same time, to minimize the welding deformation and improve the processing precision of the box, it is necessary to weld in different parts of the reduction casing. Different welding processes and parameters are used. For more details, please refer to the attached content or read "Metal Processing (Hot Processing)" No. 18 Stainless Steel Centrifual Pump Stainless Steel Centrifual Pump,Stainless Steel Centrifugal Pump,Stainless Centrifugal Pump,Centrifugal Stainless Steel Pump Hengshui Yuanhan Trading Co.,Ltd , https://www.hengshuiyuanhanpump.com