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Stephen D Ridder, Age 7315705 Jones Ln, Gaithersburg, MD 20878

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Known as:
Stephen Dr Ridder Stephen D Ritter Steve Ridder
Related to:
Adriane M Ridder 30

Stephen Ridder Phones & Addresses

15705 Jones Ln, Gaithersburg, MD 20878 (301) 330-0672

Damascus, MD

Foley, AL

Fairhope, AL

Arlington, VA

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Stephen D Ridder

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Work

Company: National institute of standards and technology Jan 1980 to Nov 14, 2016 Position: Materials engineer

Education

School / High School: National Institute of Standards and Technology

Skills

Powder Metallurgy • Process Control • Transport Phenomena

Languages

English

Interests

Motorcycling • Cooking • Skiing • Exercise • Investing • Outdoors • Electronics • Home Improvement • Reading • Sports • Music • Automobiles • Camping • Woodwork • Travel • Movies • Collecting • Home Decoration

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Research

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Stephen Ridder resumes & CV records

Resumes

Stephen Ridder Photo 21

Materials Engineer

Location:
15705 Jones Ln, Gaithersburg, MD 20878
Industry:
Research
Work:
National Institute of Standards and Technology Jan 1980 - Nov 14, 2016
Materials Engineer
Education:
National Institute of Standards and Technology
Skills:
Powder Metallurgy, Process Control, Transport Phenomena
Interests:
Motorcycling
Cooking
Skiing
Exercise
Investing
Outdoors
Electronics
Home Improvement
Reading
Sports
Music
Automobiles
Camping
Woodwork
Travel
Movies
Collecting
Home Decoration
Languages:
English

Publications & IP owners

Us Patents

Producing Void-Free Metal Alloy Powders By Melting As Well As Atomization Under Nitrogen Ambient

US Patent:
5114470, May 19, 1992
Filed:
Oct 4, 1990
Appl. No.:
7/593915
Inventors:
Francis S. Biancaniello - Gaithersburg MD
Gregg N. Janowski - Hoover AL
Stephen D. Ridder - Gaithersburg MD
Assignee:
The United States of America as represented by the Secretary of Commerce - Washington DC
International Classification:
B22D 2300
B22F 900
US Classification:
75338
Abstract:
A method of producing nitrogenated metal alloys which involves melting a al alloy under a nitrogen atmosphere and subsequently gas atomizing the molten alloy with nitrogen gas has been found to produce alloys powders having a high nitrogen content and a minimum amount of hollow particles. The resulting alloy powders which demonstrate superior mechanical properties and heat and chemical resistance are easily fabricated into articles utilizing powder metallurgical processes.

High Nitrogen Stainless Steel

US Patent:
6168755, Jan 2, 2001
Filed:
May 27, 1999
Appl. No.:
9/321113
Inventors:
Francis S. Biancaniello - Gaithersburg MD
Stephen D. Ridder - Gaithersburg MD
Rodney D. Jiggetts - Germantown MD
Assignee:
The United States of America as represented by the Secretary of Commerce - Washington DC
International Classification:
C22C 3838
C22C 3858
C22C 2914
B22F 312
US Classification:
420 57
Abstract:
Disclosed is a high nitrogen stainless steel alloy and alloy powder comprising chromium (Cr), molybdenum (Mo), manganese (Mn), nickel (Ni), nitrogen (N) and iron (Fe). The composition of the stainless steel alloy and powder comprises between about 27 and about 30% by weight Cr, between about 1. 5 and about 4. 0% by weight Mo, Mn present and is present in an amount up to 15% by weight, at least about 8% by weight Ni, and about 0. 8 to about 0. 97% by weight N with the balance being iron. It has been discovered that forming an alloy of this chemistry using nitrogen gas atomization process, followed by a consolidation process, the alloy is less likely to form detrimental ferrite, stable nitride and sigma (. sigma. ) phases, without the need for further processing, such as solution treating and quenching. This allows for the formation of stainless steel articles having a thicker cross-section with reduced processing cost.

Isbn (Books And Publications)

Liquid Metal Atomization: Fundamentals And Practice

Author:
Stephen D. Ridder
ISBN #:
0873394658

Possible Relatives

Deborah A Ridder  Eric T Ridder  James J Ridder  Kurt J Ridder  Linda R Ridder  Nancy A Ridder  Pamela J Ridder  Stephen R Stanek  Stephen S Stanfill  Stephen M Stanford 

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