Forgings are objects that are pressed by the metal to shape the required shapes or appropriate compressive forces through plastic deformation. This power is typically achieved by using a hammer or pressure. The forging process builds fine granular structures and improves the physical properties of the metal. In the practical use of parts, a correct design can make the particle flow in the direction of the main pressure.
Large flange is the first cut into the appropriate strip, the length of the sliver according to the size of the large flange specifications. Then use the coil ring machine coil to make the circle, with the electrode to weld the interface firmly, the weld place to carry on the X-ray test. And then press the pressure machine, and then use the lathe to process water, chamfer and other processes, the last is to use the division plate with the drill hole drilling machine to punch holes in the processing. When the bolt hole is punched, the bolt hole can not be punched in a large flange welded joints.
The production process of large flange has three kinds of forging and coiling and splicing. Product size is too large can only be used for rolling and splicing process.
The technological characteristics of ring forgings are as follows: the smelting and forging processes influence the microstructure and properties of forgings to a considerable extent. In view of the annular forgings produced by the GH4169 alloy bar with vacuum induction and vacuum self consumption remelting double smelting process, the internal macrostructure defects were analyzed, and the macroscopic and microscopic microstructure was observed by dissecting the defect position. As well as the analysis of the defect region and the normal region of the matrix, the formation of the low macrostructure of ring forgings may be due to NB, ti element segregation, δ phase and MC Enrichment, which are the defects in smelting, Non-dominant inducing factors of forging process.
The advantages of the forgings are the stretching length, the retractable cross-section, the length that can be contracted, the transverse cross-section that can be stretched, the length that can be changed, and the cross-section that can be changed. The types of forgings are: free forging/hand forging, die/precision forging, top forging, rolling and forging.