Roman I Pankiw

US Patent:

8003045, Aug 23, 2011

Filed:

Jun 4, 2010

Appl. No.:

12/793930

Inventors:

Govindarajan Muralidharan - Knoxville TN, US
Vinod Kumar Sikka - Oak Ridge TN, US
Philip J. Maziasz - Oak Ridge TN, US
Roman I. Pankiw - Greensburg PA, US

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

C22C 38/44
C22C 38/48

US Classification:

420 53, 4205861, 148327, 148419

Abstract:

A cast, austenitic steel composed essentially of, expressed in weight percent of the total composition, about 0. 4 to about 0. 7 C, about 20 to about 30 Cr, about 20 to about 30 Ni, about 0. 5 to about 1 Mn, about 0. 6 to about 2 Si, about 0. 05 to about 1 Nb, about 0. 05 to about 1 W, about 0. 05 to about 1. 0 Mo, balance Fe, the steel being essentially free of Ti and Co, the steel characterized by at least one microstructural component selected from the group consisting of MC, MC, and M(C, N).

US Patent:

8318083, Nov 27, 2012

Filed:

Jul 20, 2010

Appl. No.:

12/839844

Inventors:

Roman I Pankiw - Greensburg PA, US
Govindarajan Muralidharan - Knoxville TN, US
Vinod Kumar Sikka - Oak Ridge TN, US
Philip J. Maziasz - Oak Ridge TN, US

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

C22C 30/00

US Classification:

4205841, 148327, 148442, 420 43, 420 53, 420586, 4205861

Abstract:

The present invention addresses the need for new austenitic steel compositions with higher creep strength and higher upper temperatures. The new austenitic steel compositions retain desirable phases, such as austenite, MC, and MC in its microstructure to higher temperatures. The present invention also discloses a methodology for the development of new austenitic steel compositions with higher creep strength and higher upper temperatures.

US Patent:

20060157161, Jul 20, 2006

Filed:

Jan 19, 2005

Appl. No.:

11/038923

Inventors:

Govindarajan Muralidharan - Knoxville TN, US
Vinod Sikka - Oak Ridge TN, US
Philip Maziasz - Oak Ridge TN, US
Roman Pankiw - Greensburg PA, US

International Classification:

C22C 38/44
C22C 38/48

US Classification:

148327000, 420053000

Abstract:

A cast, austenitic steel composed essentially of, expressed in weight percent of the total composition, about 0.4 to about 0.7 C, about 20 to about 30 Cr, about 20 to about 30 Ni, about 0.5 to about 1 Mn, about 0.6 to about 2 Si, about 0.05 to about 1 Nb, about 0.05 to about 1 W, about 0.05 to about 1.0 Mo, balance Fe, the steel being essentially free of Ti and Co, the steel characterized by at least one microstructural component selected from the group consisting of MC, MC, and M(C, N).

US Patent:

20070180884, Aug 9, 2007

Filed:

Feb 7, 2007

Appl. No.:

11/672439

Inventors:

Roman Pankiw - Scottdale PA, US
Dan Miller - Scottdale PA, US
Vincent Schiavoni - Greensburg PA, US

Assignee:

DURALOY TECHNOLOGIES, INC. - Scottdale PA

International Classification:

B21B 13/14

US Classification:

072241200

Abstract:

A water-cooled furnace roll has a hollow rotating arbor, having cooling fluid passages formed therein, wherein the arbor is formed from a heat resistant centrifugally cast alloy, and a plurality of annular tires spaced along said arbor and secured to the arbor, wherein the spaces between the tires is adapted to receive refractory material to insulate the arbor.

US Patent:

20090053100, Feb 26, 2009

Filed:

Dec 7, 2006

Appl. No.:

11/567944

Inventors:

Roman I. Pankiw - Greensburg PA, US
Govindarajan Muralidharan - Knoxville TN, US
Vinod Kumar Sikka - Oak Ridge TN, US
Philip J. Maziasz - Oak Ridge TN, US

International Classification:

C22C 30/00
C22C 33/00

US Classification:

420585, 4205861, 148419, 420590

Abstract:

The present invention addresses the need for new austenitic steel compositions with higher creep strength and higher upper temperatures. The present invention also discloses a methodology for the development of new austenitic steel compositions with higher creep strength and higher upper temperatures.