01 What is Vacuum Carburizing?

Vacuum carburizing is a completely new concept carburizing method created by combining gas carburizing and vacuum technology. It is environmentally friendly and of high quality.

Vacuum carburizing is a revolutionary method of carburizing by using a vacuum to drastically reduce the amount of carrier gas and using only a very small amount of unsaturated chain hydrocarbon gas as carburizing gas.

02 Hardness distribution of vacuum carburizing

A deep carburized layer can be obtained in a short time.
When carburized at 800°C or lower for several minutes, uniform carburization with a total hardened layer depth of 50~100 μm was confirmed.

Carburization time is about 1/2 that of gas carburization, shortening delivery time. Low cost.

03 Surface Microstructure of Vacuum Carburization

Compared to gas carburizing, vacuum carburizing can carburize deep into the pores. Since the atmosphere does not contain oxygen components, the alloying elements on the surface are not oxidized. Oxygen contamination on the surface can cause cracks (abnormal carburizing layer), which leads to improved quality of the finished product. Finish surface is excellent, so finishing can be eliminated.

04 Other Features

• In the gas carburizing method, the surface is oxidized by oxidation components in the furnace atmosphere, resulting in a light gray color. Highly concentrated carburizing is possible without sueting.
• Highly concentrated carburization features excellent sliding and mold release properties.
• No emission of carbon dioxide, a greenhouse gas. Environmentally friendly treatment.
• Surface hardening of austenitic stainless steel is possible.