Vacuum Annealing Furnace

Name: Vacuum Annealing Furnace
Brand: SYNHTE

Vacuum Annealing Furnace for Precision Heat Treatment and Stress Relief Applications

The Vacuum Annealing Furnace is configured for clean batch annealing, stress relief, bright heat treatment and tempering where surface condition, thermal consistency and repeatable recipes matter.

It is suited to manufacturers who need to control oxidation, decarburization, discoloration and dimensional change through the combined selection of hot zone, vacuum system, loading, cooling and process recipe.

Selection starts with the alloy, part condition, required metallurgical result, surface-finish target, load geometry and production volume. SYNHTE can align the final configuration and acceptance plan with representative parts and agreed inspection criteria.

Our vacuum annealing furnaces are designed to perform precise thermal cycles under high-vacuum or protective gas conditions.

By effectively eliminating oxygen and other reactive gases during heating, the furnace helps prevent surface oxidation, decarburization, and discoloration, making it especially suitable for components with high surface finish requirements.

The equipment can be configured with graphite heating chambers or metallic hot zones, depending on processing temperature, material compatibility, and application needs.

The vacuum annealing furnace uses nickel-chromium/molybdenum heating elements, with a maximum operating temperature of 1300℃ and temperature uniformity maintained within ±5℃. In terms of vacuum performance, the ultimate vacuum is 5×10⁻⁴ Pa, the pressure rise rate is 0.5 Pa/h, and the gas-cooled pressure is 2 bar.

We offer standard models in the following sizes:

Effective zone size ranges from 300×300×450 mm to 1000×1000×1500 mm.

Loading capacity ranges from 100 kg to 1500 kg.

Heating power ranges from 80 kW to 450 kW.

For special furnaces, we can also provide solutions and designs according to customer requirements.

High vacuum level for oxidation-free heat treatment
Excellent temperature uniformity throughout the chamber
Programmable multi-step annealing process control
Rapid heating and controlled cooling capability
Optional nitrogen, argon, or hydrogen protective atmosphere
Intelligent PID temperature control system
Energy-efficient insulation structure
Horizontal or vertical chamber design available

The vacuum annealing furnace offers significant process advantages for modern industrial manufacturing:

Improves material ductility and toughness
Reduces internal stress after machining or forming
Enhances dimensional stability
Maintains bright and clean surface appearance
Minimizes distortion of precision parts
Supports repeatable mass production processes

Its robust structure and advanced control system ensure reliable long-term operation with low maintenance requirements.

Suitable for a wide range of heat treatment processes, including:

Vacuum annealing
Bright annealing
Stress relief annealing
Soft annealing
Recrystallization annealing
Degassing treatment
Diffusion heat treatment

This equipment is widely applied in:

Aerospace components
Automotive parts manufacturing
Medical device production
Tool and die industry
Powder metallurgy
Electronics and semiconductor materials
Stainless steel tube and strip processing

Compatible with multiple industrial materials, such as:

Stainless steel
Carbon steel
Copper and copper alloys
Titanium alloys
Nickel-based alloys
Magnetic alloys
Powder metallurgy parts

The vacuum annealing furnace can be equipped with flexible optional modules to meet different materials and process requirements.

Heating Chamber (Graphite / Metal)
Heating Element (Nickel-chromium / Molybdenum)
Vacuum System(Rotary vane pump / Diffusion pump / Molecular pump)
Protective Gas (Nitrogen / Argon / Hydrogen / Mixed gas)
Cooling System (Water cooling / Air cooling)
Control & Automation (PLC / touchscreen)
Chamber Customization (Horizontal / vertical / chamber sizes / Tray or fixture loading structures)

Selection, acceptance and RFQ checklist

Build a project-specific configuration from the published range by defining the material response, load arrangement, cooling target, traceability and acceptance method.