Material: Ordinary austenitic stainless steels such as 304, when used in the temperature range of 450–850°C (the sensitization temperature range), are susceptible to chromium carbide precipitation at grain boundaries, leading to chromium depletion and consequent vulnerability to intergranular corrosion. In 321 stainless steel, titanium is added due to its stronger affinity for carbon than chromium. Titanium preferentially forms titanium carbides, effectively inhibiting the formation of chromium-depleted zones at grain boundaries and significantly enhancing resistance to intergranular corrosion. Studies have also confirmed that 321 stainless steel does not require additional stabilization heat treatment after welding, and its welded joints maintain good resistance to intergranular corrosion — outperforming 310 stainless steel, which does not contain titanium.

Dimensional Accuracy Assurance: The machining process follows a sequence of roughing, medium roughing, semi-finishing, and finishing on CNC machining centers. Finished products are inspected using CMM (coordinate measuring machine) inspection and GOM 3D scanning to ensure product quality.

Anti-deformation Process: Stainless steel components are prone to deformation during machining. We adopt a cutting process combining stress relief and coolant-assisted cold cutting, ensuring that flatness after machining is controlled within 0.1 mm per meter.

Custom Cutting Tools: Stainless steel tends to cause rapid tool wear during machining. Based on the compositional characteristics of this material, we have developed custom cutting inserts specifically designed for machining it. This increases cutting efficiency by 60–80% and reduces tooling costs by 50–60%.

Typical Customers: Leading nuclear power companies both domestically and internationally.

CMM Inspection: After the product is machined, GOM 3D scanning inspection is carried out and an inspection report is issued.