Bearings and precision parts easily develop fatigue failure due to decarburization and uneven hardness. Rexin vacuum quenching & tempering equipment achieves oxidation-free processing for GCr15 steel. Accurate thermal control stabilizes hardness and controls workpiece deformation.

Bearings, shaft sleeves and transmission precision parts are the core rotating components of mechanical equipment, and their service life and operational stability directly determine the overall performance of mechanical equipment. Heat treatment defect is the primary cause of part failure: surface decarburization and oxidation lead to reduced wear resistance, uneven hardness causes unstable operation, excessive residual stress leads to dimensional deformation, and unreasonable quenching and tempering processes cause early fatigue cracking. These problems lead to short part service life, equipment jitter and frequent maintenance, greatly increasing the production and after-sales costs of mechanical manufacturers.

Rexin provides full-process supporting heat treatment equipment for bearing and precision machinery manufacturing, including high-precision vacuum oil quenching furnaces, continuous mesh belt hardening lines and low-temperature stress-relief tempering furnaces. With 18 years of precision heat treatment process accumulation, we optimize the metallographic structure of bearing steel, strictly control workpiece deformation within 0.03mm, control hardness uniformity error within ±1.5HRC, and completely solve industry pain points such as decarburization, oxidation, uneven hardness and early fatigue failure. Our equipment supports both high-end customized precision parts and large-scale mass production of standard bearings, providing stable and high-yield heat treatment solutions for global precision machinery manufacturers.

1. Surface decarburization & oxidation defects Ordinary open heating causes serious surface decarburization and oxidation of bearing steel, forming a soft defect layer on the surface, reducing part wear resistance and precision, and affecting assembly matching. Rexin full vacuum/protective atmosphere closed heating completely isolates oxygen, realizes zero decarburization and zero oxidation bright heat treatment, retains the original high hardness and precision of parts.

2. Uneven hardness & unstable batch quality Ordinary furnaces have unbalanced temperature fields, resulting in large hardness differences between individual parts in the same batch, causing equipment jitter and abnormal wear during operation. Our multi-zone balanced temperature control system ensures hardness uniformity error ≤±1.5HRC, realizing 100% consistent mechanical performance of batch products.

3. Excessive residual stress & later deformation Quenching process will produce internal residual stress. Without precise tempering treatment, parts will deform and crack during long-term use. Our matched low-temperature slow tempering process thoroughly releases quenching residual stress, stabilizes part dimensional accuracy, and avoids later deformation and failure.

4. Early fatigue failure & short service life Unreasonable heat treatment process leads to disordered internal metallographic structure of steel, and parts are prone to fatigue cracking under high-speed friction and cyclic load. Our precise quenching and tempering process optimizes martensitic structure, greatly improving the anti-fatigue performance and wear resistance of bearing parts, and extending product service life by more than 30%.

High-Precision Vacuum Oil Quenching Furnace: Specialized for high-end ultra-precision bearings and mechanical parts, realizing zero decarburization, zero oxidation and 0.03mm ultra-low deformation processing, meeting high-precision assembly standards.

Continuous Mesh Belt Hardening Furnace: Support 24-hour unmanned continuous production, stable batch temperature and hardness, low failure rate, ideal for mass production of standard bearing parts.

Low-Temperature Stress-Relief Tempering Furnace: Thoroughly eliminate quenching residual stress, stabilize part size and hardness, improve product toughness and anti-fatigue performance, and avoid later cracking and deformation failure.

✅ Hardness uniformity error ≤ ±1.5HRC (far stricter than industry conventional ±3HRC standard)

✅ Zero surface oxidation & decarburization defect layer, no secondary processing required

✅ Dimensional deformation strictly controlled within 0.03mm, meeting precision assembly tolerance

✅ Complete residual stress release, no later deformation or cracking failure

✅ 100% batch quality consistency, supporting long-term OEM stable orders

Heat treatment quality is the decisive factor for the service life and operational stability of bearings and precision mechanical parts. Ordinary heat treatment equipment cannot meet high-end precision manufacturing standards due to insufficient temperature control precision and imperfect stress relief process. Relying on 18 years of industrial furnace manufacturing experience and mature precision heat treatment technology, Rexin effectively solves core industry pain points such as part decarburization, oxidation, uneven hardness and fatigue failure. With strict factory-level quality control standards and stable equipment performance, we provide cost-effective, high-yield and high-precision heat treatment solutions for global precision machinery manufacturers.

Struggling with bearing fatigue failure, uneven hardness or dimensional deformation? Contact us for free professional process guidance & factory ex-factory price.

Our Products: Mesh Belt Furnace, Vacuum Furnace, Box Furnace, Pit Nitriding Furnace, Brazing Line, Sintering Furnace

Related Application Industries: Heat Treatment Process, Hardware & Fasteners, Tooling & Cutting Tools, Stainless Steel Strip & Tube, New Energy Auto Parts, Powder Metallurgy, Heat Exchanger, Aluminum Alloy, Bearing Parts