Patents Granted For The SAT12® Process
Read about and download United States Patents granted for the SAT12 process.
Low-Temperature Case-Hardening Processes
Inventors
Peter C Williams, Cleveland Heights, OH
Steven V. Marx, University Heights, OH
Assignee
Swagelok Company, Solon, OH U.S.A
Patent Number: 6,093,303 B1
Date of Patent July 25, 2000
Abstract
A method of case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activate surface at a temperature below that temperature which would promote the formation of carbides. In one embodiment the surface is activated by disposing a layer of iron over the surface of the article.
Download patent number 6,093,303 B1
Selective Case Hardening Processes at Low Temperature
Inventors
Peter C Williams, Cleveland Heights, OH
Steven V. Marx, University Heights, OH
Assignee
Swagelok Company, Solon, OH U.S.A
Patent Number: 6,165,597 B1
Date of Patent: December 26, 2000
Abstract
A selectively case hardened steel article by low temperature carburization includes a body made of chromomium-bearing nickel or ferrous-based all0y (for example stainless steel), a first portion of the body having a first hardness characteristics, and a second portion of the body having a second hardness characteristic; the second portion being less than the entire body and substantially free of carbides. One method for selective case harding by low-temperature carburization includes the steps of applying a carbon blocking mask over surface areas of the article that are not going to be carburized; activating those surface areas that are to be carburized; diffusing carbon into the activated surface areas at temperature below which carbides readily form; and remove the carbon blocking mask.
Download patent number 6,165,597 B1
Selective Case Hardening Processes at Low Temperature
Inventors
Peter C Williams, Cleveland Heights, OH
Steven V. Marx, University Heights, OH
Assignee
Swagelok Company, Solon, OH
Patent Number: 6,461,448 B1
Date of Patent October, 8, 2002
Abstract
A method for case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activated surface of the article at a temperature below that temperature which would promote the formation of carbides. In one embodiment the surface is activated by disposing of a layer of iron over the surface of the article.
Download patent number 6,461, 448 B1
Modified Low-Temperature Case-Hardening Process
Inventors
Peter C Williams, Cleveland Heights, OH
Steven V. Marx, University Heights, OH
Assignee
Swagelok Company, Solon, OH U.S.A
Patent Number: 6,547,888 B1
Date of Patent April, 15, 2003
Abstract
An iron-containing workpiece is cased hardened by low-temperature carburization during which one or more process steps - including adjusting the carburization temperature, adjusting the concentration of the carburization specie in the carburization gas and reactivating the surfaces to be carburized - is carried out to enhance the overall rate and uniformity of the carburization with minimized soot generation whereby carburization can be completed faster than possible in the past.
Download patent number 6,547,888 B1
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