Aluminum diffusion treatment of our Calorizing, ALPLEX, etc., improves the high-temperature oxidation resistance of almost all materials, such as common steel, special steel, stainless steel, copper, etc.
Our Calorizing and ALPLEX have high-temperature oxidation resistance to machinery and machine parts, can extend the product life, improve the reliability of machine parts, and reduce maintenance costs.
| [Test condition] | |
|---|---|
| Material | STPG370 |
| Conditions | 900℃×1000hr |
Comparison of amount of oxidation
Our diffusion treatment, such as Chromizing or Vanadizing, significantly increase the surface hardness by 15 to 20 times compared with non-treated products of common steel.
Although it is possible to obtain a surface hardness close to our diffusion treatment even with general surface treatment, our diffusion treatment has the gradient function characteristic of concentration in the surface of diffused metal, so the treated layer is difficult to be exfoliated.
Therefore, it provides high abrasion resistance and exfoliation resistance, even in severe circumstances of rapid heating and cooling such as thermal shock.
Comparison of
various surface treatment hardness
Our chromizing (Chrocoat) and vanadizing treatments are more effective at preventing thermal shock than nitriding and PVD, and their coating layer adhere more strongly to the base metal.
| [Test condition] | |
|---|---|
| Material | SKD61 |
| Conditions | One charge defined as heating at 500°C × 2 min. followed by water cooling (spray) for 10 sec. |
Durability comparison of various surface treatment
Our Calorizing treatment has the excellent erosion resistance to molten zinc, solder, etc. It is used for equipment and components of continuous galvanizing line for automobile bodies and electrical appliance housings.
In addition, Chromizing and Vanadizing treatment has the superior erosion resistance to molten aluminum compared to nitrided products.
Our Calorizing treatment can extend the product life by prevention from carburizing or nitriding to furnace components and jigs during carburizing or nitriding of automotive parts, machine tool parts.
Normally, these materials are expensive due to high content of nickel and chromium, but our diffusion treatment prevents from cracking and deformation of products by carburization, which leads to extend the product life and reduce running costs.
| [Test condition] | |
|---|---|
| Material | SCH13、Calorized SCH13 |
| Time | heating at 930°C × 12 Hr. 10 charge |
| Conditions | solid carburizing |
Comparison between calorizing and non treatment at carburization resistance
| Adhesion to base metal |
Alloying with base metal |
Coating layer thickness |
Coating density |
Coating uniformity |
Coating surface roughnes |
Product shape |
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| Diffusion treatment | ◎ | ○ | ○ | ○ | ○ | △ | ○ | ||||||||||||||||||||||||||||||||||||||
| hot dipping | ○ | ○ | △ | ○ | × | △ | △ | ||||||||||||||||||||||||||||||||||||||
| plating | × | × | ○ | × | × | ○ | △ | ||||||||||||||||||||||||||||||||||||||
| thermal spraying | △ | × | ○ | × | × | △ | × | ||||||||||||||||||||||||||||||||||||||
| P.V.D | △ | × | × | ○ | ○ | ○ | × | ||||||||||||||||||||||||||||||||||||||
| C.V.D | △ | ○ | × | ○ | ○ | ○ | × | ||||||||||||||||||||||||||||||||||||||
| Classification |
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Variety of coating materials Diversity |
Diversity of materials to be treated |
Distortion after treatment |
Deterioration of mechanical properties of object |
Economy cost |
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| Diffusion treatment | ○ | △ | △ | △ | △ | ○ | ||||||||||||||||||||||||||||||||||||
| hot dipping | ○ | × | × | × | ○ | ○ | ||||||||||||||||||||||||||||||||||||
| plating | ○ | ○ | ○ | ○ | ○ | ○ | ||||||||||||||||||||||||||||||||||||
| thermal spraying | ○ | ○ | ○ | △ | ○ | × | ||||||||||||||||||||||||||||||||||||
| P.V.D | × | ○ | ○ | ○ | ○ | × | ||||||||||||||||||||||||||||||||||||
| C.V.D | × | ○ | ○ | ○ | ○ | × | ||||||||||||||||||||||||||||||||||||
| Classification |
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