Heat treatment is a critical part of manufacturing across industries, from aerospace to automotive, from metal fabrication to composite production. Each process has specific requirements for temperature control, atmosphere, and cycle duration. Choosing the right industrial oven is essential to achieving consistent, high-quality results. Explore our full range of heat treatment ovens and furnaces.
In this article, we explore the top five heat treatment processes and the types of industrial ovens best suited to each.
1. Annealing
Purpose: Relieves internal stresses, increases ductility, and refines microstructure in metals and alloys.
Industries: Aerospace, automotive, tool manufacturing, metalworking
Oven Type Needed:
- High-temperature industrial box ovens
- Optional: Inert gas atmosphere control for oxidation-sensitive materials
Key Features to Look For:
- Uniform temperature distribution
- Precise cycle control for ramp-up and soak times
- Programmable control systems for repeatability
2. Tempering
Purpose: Reduces brittleness in hardened steel and improves toughness.
Industries: Tool & die, manufacturing, aerospace, automotive
Oven Type Needed:
- Medium-temperature box or batch ovens
- Can also be done in conveyor/tunnel ovens for high-volume applications
Key Features to Look For:
- Stable mid-range temperature control (150–650°C)
- Multi-zone temperature management for consistent results
- Adjustable dwell times to match material specs
- Stress Relieving
Purpose: Reduces residual stresses from machining, welding, or forming processes without altering the overall material properties.
Industries: Fabrication, machining, heavy industry
Oven Type Needed:
- Large-capacity industrial ovens
- Custom box ovens designed for oversized or heavy parts
Key Features to Look For:
- Gradual, controlled heating and cooling cycles
- Precise low-to-mid temperature control (typically 500–700°C)
- High load-bearing capability for large components
4. Curing (for Composites, Coatings, and Adhesives)
Purpose: Hardens or sets materials like polymers, coatings, or adhesives via thermal activation.
Industries: Composites, aerospace, automotive, electronics
Oven Type Needed:
- Custom curing ovens (often box or tunnel style)
- May require a vacuum or forced-air convection
Key Features to Look For:
- Excellent airflow for even heat distribution
- Tight temperature uniformity tolerances (±2°C or better)
- Programmable logic controllers (PLCs) for accurate curing profiles
5. Drying and Preheating
Purpose: Removes moisture or prepares components for further processing.
Industries: Pharmaceuticals, electronics, ceramics, general manufacturing
Oven Type Needed:
- Low-temperature drying ovens or preheat ovens
- Batch or continuous, depending on production scale
Key Features to Look For:
- Uniform, gentle heating below 150°C
- Airflow control to manage moisture removal
- Energy-efficient insulation for prolonged drying cycles
Choosing the Right Oven for Your Heat Treatment Needs
At Caltherm, we specialise in designing and manufacturing custom industrial ovens for all major heat treatment applications. Whether you’re annealing aerospace components or curing composite panels, our ovens deliver:
✅ Precision temperature control
✅ Energy-efficient operation
✅ Custom sizing and configuration
✅ Compliance with CE and UKCA standards
✅ Integration with existing production lines
Ready to Improve Your Heat Treatment Process?
Contact Caltherm today to discuss your application and request a custom quote. Our engineering team is ready to help you find the optimal thermal solution.
Explore our range of heat treatment ovens and furnaces, custom built in the UK