Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Reexamination Certificate
2008-10-31
2011-12-27
Roe, Jessee R. (Department: 1733)
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
Reexamination Certificate
active
08083866
ABSTRACT:
A method for hardening the surfaces of work pieces made from stainless steel includes submerging the work pieces into a molten salt bath having the composition: potassium acetate 60-100 weight %; sodium acetate 0-100 weight %; metal salt 0-2 weight %, and are subjecting the work pieces to the molten salt bath for a period of 24 to 240 hours, during which the temperature of the molten salt bath is maintained less than 400° C.
REFERENCES:
patent: 2249581 (1941-07-01), Solakian
patent: 2537830 (1951-01-01), Holden
patent: 3840450 (1974-10-01), Inoue
patent: 4461655 (1984-07-01), Kerridge
patent: 10 2006 026883 (2007-08-01), None
patent: 0 054 962 (1982-06-01), None
“Kolsterisieren®, Korrosionefestes Oberflächenhärten von austenitischem, rostfreiem Stahl”. Informationsblatt der Bodycote Hardiff bv, Parimariboweg 45, NL-7333 Apeldoorn. info@hardiff.de. [Klosterizing® Corrosion-Resistant Surface Hardening of Austentic, Non-Rusting Steel].
Spies, H.-J. et al., “Structure and properties of stainless steels after plasma immersion ion implantation and plasma nitriding”,Mat.-wiss. u. Werkstofftech,1999, pp. 457-464, 30, Wiley-VCH Verlag GmbH.
“Stahl Merkblatt 821; Edelstrahl Rostfrei-Eigenschaften”,Informationsstelle Edelstahl Rostfrei PF 102205, 40013 Dusseldorf, www.edelstahl-rostfrei.de. [Steel Leaflet 821; Non-Rusting Characteristics of Stainless Steel].
Guenther, F. et al., “Surface hardening of austenitic steels under maintenance (preservation) of the corrosion resistance by low pressure and plasma caburizing”,Haerterei-Techn. Mitt., 2000, pp. 74-84, 56.
Van Der Jagt, R.H., “Kolsterising-Surface Hardening of Austenitic and Duplex Stainless Steels without Loss of Corrosion Resistance”,Heat Treatment of Metals, 2000, pp. 62-65, 3.
Sun, Y., Bell, T. (1999). The Response of Austenitic Stainless Steels to Low-Temperature Plasma Nitriding.Heat Treatment of Metals, pp. 9-16 (1999).
Alwart et al., “Low-temperature nitrocarburizing”, Advanced Materials & Processes, American Society for Metals Metals Park, Ohio, vol. 154, No. 3., pp. 41-43, 1998.
Baudis et al., “English and Translated title” [Analyses for understanding the chemical reactions during the nitrocarburizing in molten salt], HTM Haerterei, Technical Information, Publishing vol. 58, No. 5, pp. 251-256, 2003.
European Search Report issued in EP Application No. 08 018 519.2-2122 dated Dec. 16, 2010.
European Office Action issued in EP Application No. 08 01 8519 dated Dec. 16, 2010.
Baudis Ulrich
Merz Michael
Durferrit GmbH
Kinberg Robert
Roe Jessee R.
Thelen Leigh D.
Venable LLP
LandOfFree
Method for hardening the surfaces of work pieces made of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for hardening the surfaces of work pieces made of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for hardening the surfaces of work pieces made of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4295495