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Author: A. F. Hoenie
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 38
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Book Description
Numerous industrial users were asked for their appraisal of vacuum-degassed steel. Their responses regarding the merits of this vacuum treatment were varied. The producers and users of large forgings reported fewer internal defects, improved toughness, and decreased processing time through shorter hydrogen relief treatments. Improved fatigue life in applications such as bearings was attributed to fewer and smaller nonmetallic inclusions in vacuum-degassed steel. The users of medium and small forgings reported only marginal improvement in properties and little or no change in rejection rates by nondestructive testing. Unfortunately, many of the users could not give a meaningful evaluation because they knew that frequently their suppliers filled orders with vacuum-degassed steels even though such treatment was not specified. Consequently, these users are unable to separate the air melted and the vacuum-degassed steels in their stock for comparison. A more comprehensive study of fully identified steels, steelmaking practice, degassing methods, material properties, and performance in service will be required before a satisfactory evaluation of the merits of vacuum-degassed steels can be made. (Author).
Author: A. F. Hoenie
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 38
Get Book Here
Book Description
Numerous industrial users were asked for their appraisal of vacuum-degassed steel. Their responses regarding the merits of this vacuum treatment were varied. The producers and users of large forgings reported fewer internal defects, improved toughness, and decreased processing time through shorter hydrogen relief treatments. Improved fatigue life in applications such as bearings was attributed to fewer and smaller nonmetallic inclusions in vacuum-degassed steel. The users of medium and small forgings reported only marginal improvement in properties and little or no change in rejection rates by nondestructive testing. Unfortunately, many of the users could not give a meaningful evaluation because they knew that frequently their suppliers filled orders with vacuum-degassed steels even though such treatment was not specified. Consequently, these users are unable to separate the air melted and the vacuum-degassed steels in their stock for comparison. A more comprehensive study of fully identified steels, steelmaking practice, degassing methods, material properties, and performance in service will be required before a satisfactory evaluation of the merits of vacuum-degassed steels can be made. (Author).
Author: J. J. C. Hoo
Publisher: ASTM International
ISBN: 0803109997
Category : Rolling contact
Languages : en
Pages : 411
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Book Description
Author: D. J. Maykuth
Publisher:
ISBN:
Category : Heat resistant alloys
Languages : en
Pages : 48
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Book Description
This report is the third of a series which will periodically summarize the status of the various contracts involved in the Department of Defense Refractory Metals Sheet Rolling Program. Under this program, selected candidate materials are being carried through one or more of the following consecutive phases: Phase I, development of a sheet-production practice; Phase II, establishment of minimum design data; and Phase III, evaluation of sheetfabrication characteristics. To the present time, 13 contracts have been funded or planned in support of the Phase I, II, and III activities. This report summarizes the status of each of these individual contracts as of November 1, 1964. The first section describes the overall program of the Department of Defense Refractory Metals Sheet Rolling Program. Following, in the order of their discussions, are sections dealing with fabricable molybdenum alloys, unalloyed tungsten, columbium alloys, and tantalum alloys. (Author).
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1338
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Book Description
Author:
Publisher: Springer Nature
ISBN: 9464635819
Category :
Languages : en
Pages : 708
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1310
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Book Description
Author:
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 144
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Book Description
Author: John A. Gurklis
Publisher:
ISBN:
Category : Chemical milling
Languages : en
Pages : 52
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Book Description
This report assembles and correlates information on the effects of electrochemical metal-removal (ECMR) processes on mechanical properties. Of special interest and concern are the effects of ECMR on fatigue strength. The report covers four electrochemical metal-removal processes: electrochemical machining (ECM), electrolytic grinding (EG), electrochemical milling, and electropolishing. General characteristics and applications of the four methods are presented and discussed; special emphasis is placed on ECM. The ECMR processes are especially useful in shaping high-strength and difficult-to-machine metals and alloys, as well as in shaping parts with unusual, complex, or fragile characteristics. (Author).
Author: J. J. C. Hoo
Publisher: ASTM International
ISBN: 0803118503
Category : Rolling contact
Languages : en
Pages : 312
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Book Description
Solicited papers from a November 1991 ASTM symposium on [title] held in San Diego, CA are grouped into seven sections: heat treatment carburizing and through-hardening; surface modification; powder metallurgy; corrosion resistant bearing steels; new bearing steels; improvement of rolling contact fat
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309173574
Category : Political Science
Languages : en
Pages : 437
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Book Description
U.S. industry faced a gloomy outlook in the late 1980s. Then, industrial performance improved dramatically through the 1990s and appears pervasively brighter today. A look at any group of industries, however, reveals important differences in the factors behind the resurgenceâ€"in industry structure and strategy, research performance, and location of activitiesâ€"as well as similarities in the national policy environment, impact of information technology, and other factors. U.S. Industry in 2000 examines eleven key manufacturing and service industries and explores how they arrived at the present and what they face in the future. It assesses changing practices in research and innovation, technology adoption, and international operations. Industry analyses shed light on how science and technology are applied in the marketplace, how workers fare as jobs require greater knowledge, and how U.S. firms responded to their chief competitors in Europe and Asia. The book will be important to a wide range of readers with a stake in U.S. industrial performance: corporate executives, investors, labor representatives, faculty and students in business and economics, and public policymakers.
