Shanxi Jianing Forging has gathered real-world cases of wind power flange rings, ring gears, bearing rings, roller rings, and other ring landings, with a complete range of finished forging products for carbon steel, stainless steel, and alloy rings, providing reference for product selection and non-standard solutions.
In shipbuilding, ring forgings, as key structural components, directly affect the reliability and service life of hull connections. Recently, a ship parts factory in Xi'an, Shaanxi, set high technical specifications and delivery requirements for ring forgings while advancing a new type of ship parts project. As a long-term provider of precision forging, Caring Forging provided targeted solutions for this project.
A ship parts factory undertook a batch of supporting orders for large ocean-going vessels and needed to purchase various specifications of annular forgings for hull connectors and support structures. The factory's original suppliers could not meet new design standards in terms of precision, batch stability, and material mechanical properties, so they sought cooperation with forging manufacturers with mature process capabilities. After understanding the project background, Jianing Forging quickly organized a technical team to coordinate and developed a complete process plan from material selection to post-forging heat treatment.
This customer faced three core challenges when purchasing ring forgings: 1. Strict tolerances for inner and outer diameters of forgings, making it difficult to control deformation in traditional open-die forging processes, resulting in excessive machining allowance for subsequent processing; Second, the marine environment places high demands on the low-temperature impact toughness of forgings. Ordinary carbon steel cannot meet the standards and requires the use of microalloyed forging materials; Third, the overall delivery cycle is compressed to within 45 days, whereas conventional forgings usually take more than 60 days from mold preparation to finished product inspection. If these issues are not resolved, they will directly affect the assembly efficiency of customers' ship parts and the certification schedule of final products.
To address these pain points, Jianing Forging, leveraging its expertise in the ring forgings field, has launched the following solution: using CNC ring milling machines combined with preforming processes to control internal and external diameter dimensional deviations within equipment precision, effectively reducing subsequent machining allowances. In terms of materials, low-carbon steel grades with optimized microalloy ratios are selected. Through temperature-controlled forging and normalizing heat treatment, the impact toughness of the forgings stably reaches the design value at -20°C. At the same time, by linking parallel production scheduling with hot quenching and tempering processes, the delivery cycle was shortened to 42 days, and an additional ultrasonic inspection was added to support internal quality. The final delivered ring forgings successfully passed the customer's factory re-inspection, and all mechanical tests for the trial hull nodes after assembly met specifications.
