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Sub-Zero Treatment |
| After years of scepticism cryogenic treatment of metals has become an accepted and popular technique as a secondary process to follow the quenching of heat-treated parts.
Some of the benefits that it offers are:
- improved stress relief
- better dimensional stability
- more uniform structural stability
- improved wear resistance
- useful technique for shrink fitting
These improvements are connected to the transformation of retained austenite in to martensite and/or the precipitation of newly formed carbides arising from the sub-zero treatment process. Best results are seen for tool steels and high carbon steels (wear improvements by more than 500 percent!), where the amount of retained austenite normally is high. Liquid nitrogen is with its extremely low temperature (-196° C) an effective cooling medium. To serve our customers we have developed several cold boxes for cryo-treatment using liquid nitrogen.
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| Anders Astrom |
| Telephone: | 0049/89/31001 - 678 |
| Fax: | 0049/89/31001 - 699 |
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