In the building materials heavy industry industry, the quality of large cylindrical forgings directly affects the stability and safety of equipment operation. Jianing Forging provides a complete set of high-precision cylindrical forging solutions tailored to the actual needs of a heavy building materials factory in Mudanjiang, Heilongjiang, helping customers improve production line efficiency and product reliability.

Case Summary

The client for this cooperation is a heavy building materials factory in Mudanjiang, Heilongjiang, whose core equipment components require a batch of custom large tube forgings. Since the forging must operate long-term in high-temperature, high-pressure, and heavy-duty environments, the customer has set strict standards for material uniformity, dimensional accuracy, and comprehensive mechanical properties. Jianing Forging, leveraging its technical expertise in the field of large cylindrical forgings, undertook the full-process production tasks for this batch.

Customer pain points

The client faced multiple challenges during project advancement: first, traditional forging processes struggled to meet the precision requirements for large wall thickness and high coaxiality of cylinder forgings, resulting in excessive clearance during installation; Second, internal defects such as segregation and looseness in the raw materials affect the service life of the forging; Third, delivery cycles are tight, and most suppliers on the market cannot complete the entire process including quenching and tempering and flaw detection within the specified time. These issues not only caused multiple rework but also slowed down the entire line's commissioning schedule.

Product advantages

To address customer pain points, Jianing Forging provides systematic solutions from the following dimensions:

• Material optimization and cleanliness control: Selecting high-quality alloy steel ingots, multi-pass forging and high-temperature diffusion annealing to eliminate segregation, helps the internal structure of the cylinder to be dense and uniform.
• Fine forming process: Uses large-tonnage presses combined with specialized die dies to achieve synchronous molding of inner and outer diameters of the cylinder, controlling single-side machining allowance within a reasonable range to reduce subsequent processing volume.
• Stable quenching and tempering heat treatment: Customizing quenching and tempering curves based on workpiece cross-sectional dimensions helps reduce overall hardness to meet usage requirements while eliminating residual stress.
• Strict full-process testing: ultrasound and magnetic particle flaw detection combined with hardness and tensile testing, with reports issued for each item, helping to prevent defects exceeding standards.

The final delivered cylinder forgings passed customer acceptance in one go, with assembly precision and service life meeting expectations, effectively supporting the customer's equipment to be put into production on schedule.