Product Info

Carburizing furnaces enhance metal surface hardness and durability through carbon diffusion. This guide explains how they work, types available, and how to select the right one for your application.

■ What Is a Carburizing Furnace?
A carburizing furnace is a high-temperature system used to diffuse carbon into the surface layer of steel and metal parts. This process improves wear resistance, hardness, and service life of critical components. It is widely applied in industries like automotive manufacturing, tool production, and aerospace engineering.

■ How Carburizing Furnaces Work
Carburizing involves three key steps at temperatures between 850–950°C:
1. Heating
・ The metal part is heated to a temperature where its surface can absorb carbon.
2. Carbon Diffusion
・ Carbon-rich gases like methane (CH₄) or carbon dioxide (CO₂) are introduced.
・ Carbon atoms penetrate the metal surface, forming a hardened layer.
3. Quenching
・ The part is quickly cooled using water or oil.
・ This locks in the hardened surface, boosting strength and durability.

■ Types of Carburizing Furnaces
1. Vacuum Carburizing Furnace
✅ Operates under vacuum to reduce oxidation
✅ Delivers precise carbon control
✅ Ideal for aerospace and high-precision applications
2. Continuous Carburizing Furnace
✅ Equipped with conveyor feeding for high-volume processing
✅ Commonly used in automotive and mass manufacturing
3. Batch Carburizing Furnace
✅ Suitable for large, customized, or complex parts
✅ Allows flexible, part-specific treatment

■ Key Advantages of Carburizing
✔️ Improves surface hardness and wear resistance
✔️ Extends the lifespan of mechanical parts
✔️ Enhances performance under high-friction conditions
✔️ Offers consistent quality with advanced furnace control systems

■ How to Choose the Right Carburizing Furnace
🔹 Workpiece Type: Size and material determine furnace design
🔹 Production Volume: Choose batch or continuous types accordingly
🔹 Control Precision: Essential for maintaining consistent treatment quality

■ Recommended Product: HI-SHIFTER™ Batch Gas Carburizing Furnace from Chugai Ro (Thailand) Co., Ltd.
The HI-SHIFTER™ is Japan’s first batch-type gas carburizing furnace, developed to support a wide range of heat treatment processes—not only carburizing but also clean treatments required by modern factories. The latest model, "Flameless HI-SHIFTER™," features a vacuum chamber and advanced vacuum exhaust system for enhanced safety and energy efficiency. These innovations reduce operational workload and improve overall process efficiency.

■ For more details, please download the PDF or contact us at your convenience.

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