The furnace is equipped with a high-efficiency forced convection system that continuously circulates heated protective gas throughout the chamber. Compared with natural convection heating, it delivers faster heat transfer and significantly reduces temperature differences between the outer and inner layers of tightly wound steel coils.

Benefits:

• Uniform heating across the entire coil
• Improved hardness consistency
• Shorter soaking time
• Reduced overall heat treatment cycle

A controlled protective atmosphere effectively minimizes oxidation and decarburization during heat treatment. Depending on the process requirements, the furnace can operate with nitrogen, cracked ammonia, or nitrogen-hydrogen mixed gas to maintain stable furnace conditions and produce clean steel surfaces.

Benefits:

• Reduced oxide scale formation
• Lower decarburization risk
• Improved surface finish
• Better product consistency after annealing

The furnace is designed to accommodate a wide range of steel grades and coil specifications, making it suitable for manufacturers with diverse production requirements.

Typical materials include:

• Carbon steel coils
• Alloy steel coils
• Bearing steel wire coils
• Spring steel wire
• Cold heading steel
• High-strength steel wire
• Special alloy wire materials

The PLC-based control system automatically manages every stage of the annealing cycle, including heating, soaking, cooling, and atmosphere regulation. Multiple process recipes can be stored for different steel grades, reducing manual operation and ensuring repeatable production quality.

Key functions:

• Multi-stage temperature programming
• Automatic heating and cooling control
• Real-time process monitoring
• Alarm and fault diagnosis
• Production data recording
• Recipe management for different materials