Heat Treatment Solutions for Automotive Parts
Automotive parts have clear requirements on hardness, structure stability, and surface condition. In actual production, the main issues are usually process stability, oxidation control, and production efficiency. Our equipment is used to solve these problems in continuous or batch production environments.
Typical Problems in Automotive Heat Treatment
Hardness variation between batches
Inconsistent temperature control or atmosphere fluctuation leads to uneven hardness. This affects gear wear resistance and fastener strength.
Surface oxidation and decarburization
Poor atmosphere control causes scale and carbon loss. Additional machining is often required after heat treatment.
Low efficiency in batch production
Traditional batch furnaces cannot match the output required for automotive supply chains.
Risk of hydrogen embrittlement
Electroplated fasteners may crack if hydrogen is not removed after plating.
The following parts are commonly processed using our heat treatment furnaces:
• Transmission gears and shafts
• Engine components (valves, pins, small shafts)
• Bolts, nuts and other fasteners
• Springs and suspension parts
• Bearings and precision machined part
Equipment Selection Based on Process
Mesh Belt Quenching Furnace
Used for small and medium automotive parts that require continuous processing. Typical applications include bolts, nuts, small gears and bearing components.
•Continuous operation, stable output
•Controlled atmosphere reduces oxidation
•Easy integration with washing and tempering sections
•Suitable for: fastener heat treatment line, automotive small parts quenching
Pit Annealing Furnace
Mainly used for long or heavy parts such as shafts and bars. Also used for spheroidizing annealing before machining.
•Good temperature uniformity in vertical loading
•Suitable for large batch annealing
•Stable structure after long holding time
•Suitable for: shaft annealing, automotive bar heat treatment
Vacuum Annealing Furnace
Used for parts that require clean surface and precise structure control. Common in high value automotive components.
•No oxidation during heating
•No decarburization
•Better surface quality after treatment
•Suitable for: precision automotive parts, high-end heat treatment
Process Improvement After Equipment Upgrade
- Hardness fluctuation reduced (more stable between batches)
- Surface oxidation reduced, less post-processing required
- Production efficiency improved with continuous operation
- Lower rejection rate in mass production
- More stable process control through atmosphere system
Production Line Configuration
The equipment can be used separately or combined into a production line:
Loading → Heating → Quenching (mesh belt furnace) → Cleaning → Tempering → Optional annealing (pit furnace or vacuum furnace) → Cooling → Unloading
Configuration depends on part type, required hardness, and production volume.
CHTEE Industrial Heat Treatment Furnace
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