Heat Treatment Line

The RRX8-95X95X26-10-SP roller hearth furnace heated salt bath is Martensitic& Bainite multi-purpose quenching production line, which is equipped with vacuum lock chambers. After quenching, the decarburization layer < 0.02μm, the oxidation depth < 15μm. High-end products can realize zero decarburization. The contents of martensite, bainite, troostite, and retained austenite meet the requirements of GB/T 3489, and passed the wind power products certification of high-end customers in July 2025. We focus on automotive bearings and motor bearings heat treatment, specialized in controlling taper and angular deformation for Class 7 bearing components after quenching. The Advantages are minimal distortion and uniform heat-treated microstructure, and consistent hardness. The surface of the parts is bluish-black with uniform color, and without mottling, which exceeds the requirements of GB/T 34891.

Martensitic& Bainite production line (machining range≤φ900*235mm), which completed equipment transformation on June 8, 2025. On the basis of martensitic quenching, it added the bainite isothermal quenching function. Inspection shows that for products with an effective wall thickness of 25mm , 5μm<bainite structure< 25μm, the surface has no oxidation, there is no troostite(in the 3mm surface layer area), the core troostite＜5%, and the structure and hardness are uniform. The line passed the wind power products certification of high-end customers in August 2025.

RGW400 Gas-Fired Mesh Belt Protective Atmosphere Martensitic Quenching Line, the quenching medium adopts Duratherm’s bright rapid quenching oil, ensure minimal distortion and uniform microstructure. This line is suitable for the heat treatment of light series and extra-light series small bearing components. Under protective atmosphere, decarburization layer <0.02mm.