Heat Treatment Furnace for 304 316 410 Stainless Steel Mirror Bright Annealing

Stainless Steel Bright Annealing Furnace with Protective Atmosphere

Stainless Steel Bright Annealing Furnace (bright annealing furnace) is dedicated heat treatment equipment for stainless steel. It completes high-temperature solution annealing in sealed high-purity reducing atmosphere. Workpieces come out with mirror bright oxide-free surface, internal stress relief and material softening without pickling or polishing post-treatment.

Applicable for full stainless steel series (201, 304, 304L,316L, 410, 430),410 hardness up to HV800 after treatment. Working temperature: 1020℃–1080℃.

Applicable Workpieces: Stainless steel tubes, sheets, strips, bars, wires, fasteners, tableware, kitchen hardware, refrigeration accessories, medical components, electronic hardware & connectors, energy storage liquid cooling plates, new energy auto parts, aerospace precision hardware.

Fill the furnace with ammonia dissociated gas or high-purity hydrogen, and maintain slight positive pressure to isolate air. Workpieces are heated and soaked at solution temperature to fully dissolve carbides into austenite, then rapidly cooled to skip 550–850℃ carbide precipitation zone, ensuring excellent corrosion resistance and bright metallic surface.

1. High-purity reducing atmosphere without oxygen, no discoloration or oxide scale on parts

2. Rapid cooling system with standard cooling rate to stabilize stainless steel metallographic structure

3. Full fiber energy-saving lining, multi-zone independent PID control for uniform and accurate temperature

4. Slightly positive pressure sealed chamber to prevent air infiltration and workpiece oxidation

5. Matched with roller mesh belt for fully automatic continuous assembly line production

1. Cost & eco saving without pickling: Eliminate pickling, grinding and polishing processes to reduce hazardous waste disposal cost and achieve green production

2. Improved material performance: Completely relieve internal stress caused by stamping and drawing, form uniform and dense grains, and greatly enhance corrosion resistance

3. 24h continuous mass production: Stable integrated assembly line operation with large output for standardized mass processing

4. Energy saving with waste heat recovery: Composite heat preservation structure improves thermal efficiency with lower energy consumption than traditional batch furnaces

5. High-end industry adaptation: Suitable for high-cleanliness and high-appearance requirement products in food, medical, precision electronics and automotive decoration fields

1.Solution annealing: Soften stainless steel & improve ductility for subsequent bending & stamping

2.Stress relief: Prevent deformation & cracking after stamping/bending, stabilize workpiece dimension

3.Bright surface protection: Avoid high-temperature oxidation, no pickling/polishing required, eco-friendly & labor-saving

4.Brazing capability: Realize reliable brazing between copper and stainless steel with smooth welding seams

Applicable Materials: Stainless steel 201, 304, 316L, 410,430

Heating Temperature: 1020℃–1100℃

Soaking Time: 10–30min (adjusted by workpiece thickness)

Cooling Rate: ≥55℃/s

Protective Atmosphere: Ammonia dissociated gas (75% H₂+25% N₂), high-purity hydrogen

Furnace Pressure: Slight positive pressure +50~+200Pa

Processed Workpieces: Stainless steel tubes, sheets, strips, bars, wires, fasteners, tableware, medical devices, electronic hardware