Forging has a long history in China, which has been continued by the production method of hand workshops. It was probably in the early 20th century. It only gradually emerged as a mechanical industrialized production method in the railroad, military, and shipbuilding industries. The main sign of this transformation was
At present, there are four main production methods for flanges: casting, welding, forging, and rolling after forging. These production methods have their characteristics and are suitable for different types of flanges and flange manufacturers of different scales and levels. This article introduces a closed precision forging process applied to automated
Flange products are widely used, and their annual consumption is large. The closed-die forging process is used to precision form small and medium-sized flanges, which can save material and provide good performance of forgings, showing the advantages of “finer, cleaner, and more economical” in mass production. This paper introduces a
By adopting a more refined tempering process and improving the furnace charging, layering, and increasing the auxiliary support points, we can meet the requirements of high hardness and high uniformity of large ring forgings and effectively reduce the deformation. Our company has often undertaken the quenching and heat treatment of
Adopting an optimized free forging process can avoid material waste caused by the excessive amount of forging required for the small shafts at both ends of the flange shaft in traditional processes while also avoiding some quality hazards brought about by traditional forging methods to a greater extent. Traditional forging
By analyzing the solid solution and precipitation mechanism of nitrogen in F55 duplex stainless steel within the forging temperature range, the forging process is improved to solve the problems of surface cracks and delayed surface cracking in large-sized F55 duplex stainless steel after forging. The nitrogen precipitated along the grain