1.Very shallow nitriding by the gas method

Very low concentration nitriding without the compound layer by the gas nitriding method
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2.Feature

| (1) |
Since it is nitrided without making a compound layer (white layer) form in the surface, the surface does not become rough. |
| (2) |
Since there is no compound layer (white layer), tipping resistance improves. |
| (3) |
Since there is similarly no compound layer (white layer), heat check resistance improves. |
| (4) |
It is effective in ground processing of dry coating. |
| (5) |
It is small distortion nitriding. |
| (6) |
Weldability is good. |
| (7) |
The finish skin is good. |
| (8) |
Re-nitriding processing is possible. |
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3.Usage

Precise die, Tools, Ejector pin, Punch. etc. |
4.Cross-sectional structure and hardness plofile curve

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| 1.
Cross-sectional structure of SKH51 |
2.
hardness plofile curve of SKH51 |
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