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Jul. 27, 2026
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The continuous stainless steel bright annealing furnace is a fully automatic mesh-belt thermal processing system engineered for high-precision stainless steel annealing applications. Different from conventional open-type annealing equipment that causes unavoidable surface oxidation, discoloration and inconsistent finish, this furnace adopts a fully sealed nitrogen-hydrogen shielding atmosphere system, completely isolating oxygen invasion throughout the entire heating and cooling cycles.
This advanced thermal processing equipment enables one-step oxidation-free bright annealing for diverse stainless steel components, eliminating secondary post-processing procedures such as acid pickling and manual polishing. Equipped with multi-zone independent PID closed-loop temperature control and a heavy-duty continuous conveying structure, the equipment delivers stabilized metallographic structure, consistent mechanical properties and uniform mirror-bright surface finish, ensuring high and stable batch qualification rates. It is widely adopted for standardized mass production of stainless steel tubes, strips, profiles and precision hardware components across global metal manufacturing industries.
Traditional open-atmosphere annealing processes have long restricted product consistency and production efficiency, creating universal technical bottlenecks for stainless steel processing manufacturers. Exposed heating environments inevitably lead to workpiece oxidation, surface discoloration and blackening, requiring additional polishing and chemical treatment that increase labor costs, time consumption and environmental pressure. In addition, uneven temperature distribution in conventional furnaces results in inconsistent material hardness, residual internal stress and irreversible thermal deformation of finished precision parts.
Moreover, conventional batch-type furnaces can only perform intermittent processing, failing to support high-volume, non-stop industrial production and limiting factory capacity expansion. Standardized general-purpose equipment also cannot adapt to customized workpiece dimensions, variable production speeds and differentiated workshop layout requirements. Our continuous shielding atmosphere bright annealing furnace thoroughly solves the above industry pain points through fully sealed gas protection, high-precision zoned thermal control and automated inline production design, effectively improving product yield and reducing comprehensive operational costs.
The fully welded sealed furnace chamber is filled with customized nitrogen-hydrogen mixed shielding gas, completely blocking oxygen and moisture intrusion during high-temperature thermal processing. Processed stainless steel workpieces obtain uniform, flawless mirror-bright surfaces without oxidation spots or surface discoloration. It completely eliminates the need for post-process polishing, pickling and other secondary treatments, greatly simplifying the production workflow and lowering overall manufacturing costs.
The furnace adopts segmented independent PID intelligent closed-loop temperature regulation, maintaining internal temperature uniformity within ±2℃. Accurate and stable thermal distribution effectively eliminates residual internal stress generated during heating and cooling processes, stabilizes material toughness, hardness and structural uniformity, and ensures zero quality deviation in large-batch continuous production.
Constructed with thickened SUS310S high-temperature resistant mesh-belt and reinforced heat-insulating furnace body structure, the equipment supports long-term stable unattended operation. The integrated automatic feeding, constant-temperature heating and gradient discharging system realizes fully streamlined inline production, perfectly meeting high-capacity, high-efficiency continuous manufacturing demands for industrial stainless steel components.
This annealing furnace is compatible with all mainstream industrial stainless steel grades, covering 200-series, 300-series and 400-series materials including 201, 304, 316, 410, 416 and 420. It stably and precisely processes stainless steel tubes, strips, sheets, profiles and various precision hardware components, delivering excellent adaptability for diversified standardized and customized thermal processing scenarios.
We provide full-range personalized non-standard customization services tailored to diverse production demands. Customizable parameters include furnace body effective length, mesh-belt width, adjustable working temperature range, conveying operating speed and shielding gas distribution configuration. All thermal processing solutions are designed and optimized according to clients’ actual workpiece specifications, daily production capacity and on-site workshop spatial layout.
The continuous bright annealing furnace adopts a modular segmented integrated structural design. The entire annealing process is completed in a fully sealed low-oxygen shielding atmosphere environment to avoid external air interference. Workpieces are stably and continuously conveyed by the high-temperature resistant mesh-belt through three core functional zones to complete standardized, high-precision thermal treatment.
In the preheating zone, uniform low-temperature heating removes surface oil stains, dust and residual lubricants, effectively preventing local thermal deformation and cracking caused by rapid temperature rise. The high-temperature constant-temperature annealing zone adopts multi-zone balanced heating to complete material recrystallization and thorough residual stress relief under stable low-oxygen shielding atmosphere, optimizing the internal metallographic structure and mechanical properties of stainless steel materials. The sealed gradient slow cooling zone adopts circulating shielding gas cooling to avoid secondary oxidation and thermal stress concentration, ensuring consistent bright surface finish and high-precision dimensional stability of finished components.
Technical Flow Diagram： Feed → Preheating Zone → High-Temperature Constant Temperature Annealing Zone → Sealed Gradient Slow Cooling Zone → Discharge
Continuous Bright Annealing Furnace — Top View
|
Item |
Technical Specification |
| Applicable Materials | Full series of industrial stainless steel, including 304, 316, 410, 201, 416, 420 and other mainstream stainless steel grades |
|
Rated Power |
120KW – 260KW (customized according to production scale) |
|
Rated Voltage |
380V, 3-phase industrial power frequency |
|
Temperature Range |
Normal working temperature: 650℃ – 1050℃; Standard annealing process temperature: 1020℃–1080℃; Max temperature: 1100℃ |
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Temperature Uniformity |
≤±2℃ |
|
Heating Control Mode |
Multi-zone independent PID intelligent temperature control |
|
Core Process & Protective Atmosphere |
Nitrogen-hydrogen mixed protective atmosphere, oxidation-free mirror bright annealing process |
|
Internal Oxygen Content |
≤50ppm, zero oxidation annealing |
|
Mesh Belt Specification |
250mm / 300mm / 400mm width optional, SUS310S heat-resistant steel |
|
Conveying Speed |
80–400mm/min, infinitely variable frequency speed regulation |
|
Production Mode |
Fully automatic 24-hour continuous uninterrupted operation |
|
Finished Workpiece Surface Hardness |
HV 800, stable and controllable after standard annealing process |
|
Processing Workpieces |
Stainless steel tubes, strips, sheets, fasteners, auto parts, kitchen hardware and precision fittings |
|
Customizable Items |
Furnace length, mesh belt width, working temperature, running speed, gas proportion and system configuration |
This continuous shielding atmosphere bright annealing furnace is widely applied in new energy equipment manufacturing, automotive precision component processing, refrigeration and home appliance production, precision electronics and metal hardware manufacturing industries. It is specially suitable for mass high-precision bright annealing of stainless steel heat exchanger parts, cooling pipe fittings, precision fasteners, kitchen stainless steel structural parts and electronic conductive components. With mature, stable and verifiable thermal processing technology, our equipment has supported standardized and customized production lines for numerous metal processing enterprises worldwide.
Types of Applicable Components
Precision Fasteners
Cooling Pipe Fittings
Stainless Steel Heat Exchanger Parts
Spring Components
Electronic Conductive Terminals
Automotive Precision Components
Refrigeration Structural Parts
Metal Hardware Components
Real Photos of Components Treated with Our Bright Annealing Furnace at Customer Factory
Dongguan Rexin Machinery is a professional high-tech manufacturer specializing in the R&D, structural optimization and customized production of industrial atmosphere heat treatment furnaces. We have accumulated in-depth technical reserves and rich on-site practical experience in protective atmosphere annealing, brazing and tempering systems, providing stable, efficient and cost-effective thermal processing equipment solutions for global industrial manufacturers.
All our annealing furnaces adopt high-purity heat-resistant stainless steel materials and standardized industrial manufacturing processes, featuring stable long-term operation, low energy consumption, low failure rate and high production yield. We provide one-stop full-lifecycle services including personalized thermal process solution design, factory direct supply, on-site installation and commissioning, professional operational technical training and long-term after-sales maintenance support, ensuring stable and worry-free production cooperation for every global client.
We provide complete supporting heat treatment equipment to form a full-process thermal processing production line, including stainless steel brazing furnaces, box-type tempering furnaces and mesh-belt hardening furnaces. Customized integrated production line solutions can be tailored to match clients’ full manufacturing process and technical requirements.
Our Products
18+ years factory for continuous bright annealing & brazing furnaces. Custom industrial heat treatment furnaces for stainless steel components, fasteners and auto parts. Global export & full technical support.
Does bright annealing equipment require post-polishing or acid pickling?
No secondary polishing or acid pickling treatment is required. The fully sealed nitrogen-hydrogen shielding atmosphere effectively isolates oxygen invasion during high-temperature heating, enabling workpieces to obtain uniform mirror-bright surface finish directly after annealing. It eliminates traditional post-processing procedures, greatly reducing labor input and overall production costs.
Can this continuous annealing furnace support long-term mass production?
Yes. The optimized integral furnace structure and heavy-duty SUS310S mesh-belt conveying system support stable 24/7 non-stop automatic inline production, fully meeting the high-efficiency and large-scale production requirements of modern stainless steel processing factories.
What stainless steel grades are compatible with this furnace?
The equipment supports mainstream industrial stainless steel materials, covering full series of 200-series, 300-series and 400-series stainless steel, especially suitable for precision annealing of 304, 316 and 410 stainless steel workpieces, adapting to most commercial stainless steel precision annealing and mass production scenarios.
Is non-standard customization available for the annealing furnace?
We support comprehensive non-standard customized services. We can flexibly adjust the furnace body length, mesh-belt width, working temperature curve, operating speed and shielding gas system configuration according to clients’ actual workpiece dimensions, production capacity targets and workshop layout conditions.
What are the advantages of continuous mesh-belt furnaces over traditional batch box furnaces?
Different from intermittent batch-type box furnaces with low efficiency and unstable batch consistency, our continuous mesh-belt annealing furnace realizes fully automated inline assembly line production. It features higher operational efficiency, more uniform thermal field distribution and superior batch quality stability, which is more suitable for modern large-scale and standardized industrial production.
What complete after-sales support is provided?
We provide a 1-year full equipment warranty, overseas remote guidance and on-site installation & commissioning services, professional operator technical training, as well as lifelong free technical consultation and paid after-sales maintenance services to ensure long-term stable equipment operation.
Get Custom Solution & Quotation
If you are looking for high-stability, low-consumption and high-efficiency customized stainless steel bright annealing equipment for your production line, please provide your detailed workpiece parameters, target production capacity and workshop layout conditions. Our professional engineering team will formulate the most scientific and economical annealing furnace solution and deliver a competitive factory-direct quotation within 24 working hours. >>> Contact Us
If you are interested in any of our products or would like to make your customized order, please feel free to contact us. We are looking forward to establish successful business relations with you.
