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Expanite A/S[redigér | rediger kildetekst]
Expanite A/S is a supplier of surface hardening and [treatment] of stainless steel. Primary facility (600m2) in Hillerød, Denmark R&D facility incl. lab and experimental furnaces, US treatment facility near Cleveland, Ohio, German treatment facility near Stuttgart, China treatment facility in Taicang.
Based on ongoing research since 2000, and founded in 2010 by leading scientists in the field of surface hardening on Stainless Steel, Expanite has its roots deeply planted in a fact-driven environment.
The Expanite treatment makes it possible to increase the surface hardness of stainless steels by a factor of 10, while maintaining or even improving corrosion resistance. You can choose to have your material processed in our facilities in a few days. You can also opt for a fully automatic solution installed directly in your production line.
History[redigér | rediger kildetekst]
Arises from Danish Technical University in Copenhagen DTU. Expanite founded in 2010 by [Marcel Somers], Ph.D. Thomas L. Christiansen, Ph.D. Thomas Strabo Hummelshøj
Technology[redigér | rediger kildetekst]
Expanite High-T The purpose of this process is to dissolve nitrogen in the surface of stainless steel to a depth in the range of 0.2-2 mm. Peak hardness ranges from 280HV on austenitic grades to 700HV on martensitic/ferritic grades.
Expanite Low-T The purpose of this process is to dissolve nitrogen and carbon in the surface of stainless steel to a depth in the range of 5-45 µm. Peak hardness ranges from 1000-1200HV on austenitic grades to 1200-1800HV on martensitic/ferritic grades.
SuperExpanite The purpose of this process is to combine ExpaniteHigh-T and ExpaniteLow-T processes to achieve higher load bearing and corrosion properties. Firstly, the ExpaniteHigh-T process is applied to create a deep case detph with moderate nitrogen content. Secondly, the ExpaniteLow-T process is applied to create a high-hardness surface on top of the ExpaniteHigh-T zone.
The Expanite processes does not result in a coating, but a diffusion zone with an increased carbon and nitrogen content. We call this zone expanded austenite, expanded martensite, or simply, Expanite.
Patents[redigér | rediger kildetekst]
“The SuperExpanite patent” is issued in US, Japan, China and South Africa and also in fx. Brazil, Russia, Korea and Europe the patent applications are pending.
References[redigér | rediger kildetekst]
Surface hardening of stainless steel