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Ravi K. Enneti, Juan L. Trasorras, Heinrich Kestler
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Book Chapter
Cemented Carbide Secondary Operations
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006054
EISBN: 978-1-62708-175-7
... Abstract This article describes the secondary operations for cemented carbide parts, namely, diamond grinding, honing, electrical discharge machining, and brazing after sintering to achieve desired results, such as specified size, shape, edge condition, and surface finish. brazing...
Abstract
This article describes the secondary operations for cemented carbide parts, namely, diamond grinding, honing, electrical discharge machining, and brazing after sintering to achieve desired results, such as specified size, shape, edge condition, and surface finish.
Book Chapter
Additive Manufacturing of Tungsten, Molybdenum, and Cemented Carbides
Available to PurchaseSeries: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006583
EISBN: 978-1-62708-290-7
... Abstract Tungsten, molybdenum, and cemented carbide parts can be produced using several additive manufacturing technologies. This article classifies the most relevant technologies into two groups based on the raw materials used: powder-bed methods, such as selective laser melting, electron beam...
Abstract
Tungsten, molybdenum, and cemented carbide parts can be produced using several additive manufacturing technologies. This article classifies the most relevant technologies into two groups based on the raw materials used: powder-bed methods, such as selective laser melting, electron beam melting, and binder jet three-dimensional (3-D) printing, and feedstock methods, such as fused-filament fabrication and thermoplastic 3-D printing. It discusses the characteristics, processing steps, properties, advantages, limitations, and applications of these technologies.
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Powder metallurgy production methods for cermet and cemented-carbide produc...
Available to PurchasePublished: 01 January 1990
Fig. 1 Powder metallurgy production methods for cermet and cemented-carbide products Production method Products 1. Presintering Cemented-carbide parts and cermets 2. Vacuum sintering Steel-bonded carbides (standard pieces) and cermets 3. Canning Steel-bonded carbides
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Book Chapter
Sintering of Hardmetals
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006069
EISBN: 978-1-62708-175-7
..., which is modified by reacting with furnace walls and carrier devices. This produces the correct carburizing and oxidizing potentials to maintain thermodynamic equilibrium with the cemented carbide. Parts are packed inside a mixture of alumina and graphite to generate high carburization potential...
Abstract
This article discusses two major sintering methods: pressureless and pressure-assisted sintering. Pressureless sintering techniques include vacuum and partial-pressure, hydrogen, and microwave sintering. Pressure-assisted consolidation techniques include overpressure sintering, sintering followed by postsinter hot isostatic pressing, hot pressing, and several rapid hot consolidation techniques. The article describes nitrogen sintering and the sintering of cermets. It reviews the furnaces used for sintering and presents the lubrication removal techniques. The article also outlines the need to control carbon and oxygen to obtain optimal properties and explains microstructure development and grain size control.
Book Chapter
Properties and Selection of Cemented Carbides
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006064
EISBN: 978-1-62708-175-7
... with cobalt and pressed and sintered to obtain cemented carbide parts. Additions of chromium and vanadium carbides are common as grain growth inhibitors, and carbides or nitrides of titanium, tantalum, niobium, and zirconium, together called cubics, are often incorporated to improve thermal and chemical...
Abstract
Cemented carbide is, in its simplest form, a metal-matrix composite of tungsten carbide particles in a cobalt matrix. This article describes the microstructure, physical, and mechanical properties of cemented carbides. The properties discussed include thermal conductivity, magnetic properties, corrosion resistance, hardness, fracture toughness, wear resistance, and thermal shock resistance. The article concludes with information on the applications, grade classification, and selection of grades.
Book Chapter
Cemented Carbides and Cermets
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003152
EISBN: 978-1-62708-199-3
... Abstract Cemented carbides belong to a class of hard, wear-resistant, refractory materials in which the hard carbide particles are bound together, or cemented, by a ductile metal binder. Cermet refers to a composite of a ceramic material with a metallic binder. This article discusses...
Abstract
Cemented carbides belong to a class of hard, wear-resistant, refractory materials in which the hard carbide particles are bound together, or cemented, by a ductile metal binder. Cermet refers to a composite of a ceramic material with a metallic binder. This article discusses the manufacture, composition, classifications, and physical and mechanical properties of cemented carbides. It describes the application of hard coatings to cemented carbides by physical or chemical vapor deposition (PVD or CVD). Tungsten carbide-cobalt alloys, submicron tungsten carbide-cobalt alloys, and alloys containing tungsten carbide, titanium carbide, and cobalt are used for machining applications. The article also provides an overview of cermets used in machining applications.
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006418
EISBN: 978-1-62708-192-4
... and the grain size of the tungsten carbide in the sintered part. Table 2 summarizes the properties of some typical carbide grades used in wear applications. Table 3 relates these compositions to application areas. Properties of representative cobalt-bonded cemented carbide grades Table 2 Properties...
Abstract
Cemented carbides, best known for their superior wear resistance, have a range of industrial uses more diverse than that of any other powder metallurgy product including metalworking and mining tools and wear-resistant components. This article discusses raw materials and manufacturing methods used in the production of cemented carbides, the physical and mechanical properties of carbides, and wear mechanisms encountered in service. Emphasis is placed on tungsten carbide-cobalt (WC-Co) or tungsten carbide-nickel (WC-Ni) materials as used in nonmachining applications. Nominal composition and properties of representative cemented carbide grades and their applications are listed in a table.
Book Chapter
Chemical Vapor Deposition and Related Processes
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003218
EISBN: 978-1-62708-199-3
... the properties of typical CVD coating materials for wear and corrosion resistance. Coatings for the cutting tool industry utilize CVD processes, particularly TiC coatings for cemented tungsten carbide tools and TiN and carbonitride coatings for high-speed tool steels and cemented carbide tools. Nearly all...
Abstract
Chemical vapor deposition (CVD) involves the formation of a coating by the reaction of the coating substance with the substrate. Serving as an introduction to CVD, the article provides information on metals, ceramics, and diamond films formed by the CVD process. It further discusses the characteristics of different pack cementation processes, including aluminizing, siliconizing, chromizing, boronizing, and multicomponent coating.
Book Chapter
Corrosion of Cemented Carbides
Available to PurchaseBook: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003838
EISBN: 978-1-62708-183-2
... Compressor plungers Bearings Cage mills Ball mill linings and balls Internal parts in industrial meters The article “Powder Metallurgy Cermets and Cemented Carbides” in Powder Metal Technologies and Applications, Volume 7, ASM Handbook, 1998, contains more information on applications...
Abstract
Cemented carbides are extremely important in corrosion conditions in which high hardness, wear resistance, or abrasion resistance is required. This article describes the effect of binder composition and carbide addition on corrosion behavior of cemented carbides. It lists the examples of their uses in corrosion applications. The article provides information on the selection of cemented carbides for corrosion applications and tabulates the corrosion resistance of cemented carbides in various media. It expounds the oxidation resistance of cemented carbides and presents some tips to improve the properties of tungsten carbide cutting tools. The article also details the coating materials and coating processes of cemented carbides.
Book: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006056
EISBN: 978-1-62708-175-7
... a funnel with a 5.08 mm (0.2 in.) orifice and results are reported as seconds per total number of grams tested. Linear and volumetric shrinkage are critical quality control parameters in cemented carbide. It is important to note that part shrinkage, from the pressing operation through fully dense...
Abstract
Quality control of cemented carbides includes the evaluation of physical and chemical properties of constituent raw material powders, powder blends/formulations, green compacts, and fully dense finished product. This article provides a summary of the underlying principles and size ranges for the American Society for Testing and Materials (ASTM) standard methods of particle sizing and distribution. It presents the methods used to analyze the chemical composition of cemented carbide materials in a tabular form. The article also presents information on microstructural evaluation and physical and mechanical property evaluation of cemented carbides.
Book Chapter
Cutting Tool Materials
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003188
EISBN: 978-1-62708-199-3
... material. This is followed by a schematic representation of their relative application ranges in terms of machining speeds and feed rates. The article provides a detailed account of chemical compositions of various tool materials, including high-speed tool steels, cobalt-base alloys, cemented carbides...
Abstract
Selecting the proper cutting tool material for a specific machining application can provide substantial advantages, including increased productivity, improved quality, and reduced costs. This article begins with a description of the factors affecting the selection of a cutting tool material. This is followed by a schematic representation of their relative application ranges in terms of machining speeds and feed rates. The article provides a detailed account of chemical compositions of various tool materials, including high-speed tool steels, cobalt-base alloys, cemented carbides, cermets, ceramics, cubic boron nitride, and polycrystalline diamond. It compares the toughness, and wear resistance for these cutting tool materials. Finally, the article explains the steps for selecting tool material grades for specific application.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001105
EISBN: 978-1-62708-162-7
... of cemented-carbide cutting tools and wear parts based on tungsten carbide (WC). Since the inception of cermet technology, the dominant concept has been that of a material based on TiC as the primary hard and refractory constituent, with the bonding provided by any of a variety of lower-melting ductile metals...
Abstract
Ceramic-metal composites, or cermets, combine the heat and wear resistance of ceramics with the formability of metals, filling an application niche that includes cutting tools, brake pads, heat shields, and turbine components. This article examines a wide range of cermets, including oxide cermets, carbide and carbonitride cermets, boride cermets, and other refractory types. It describes the powder metallurgy process by which cermets are produced, examining each step from powder preparation to post treatment. It discusses forming and compacting, injection molding, extrusion, rolling, pressing, slip casting, and sintering. It also discusses fundamental concepts such as chemical bonding, chemical composition, microstructure, and the development of physical and mechanical properties.
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002124
EISBN: 978-1-62708-188-7
... of cemented carbides, which are used in a wide range of applications, including metal cutting, mining, construction, rock drilling, metal forming, structural components, and wear parts. Approximately 50% of all carbide production is used for metal cutting applications. Although the term cemented carbide...
Abstract
This article discusses the manufacturing steps and compositions of cemented carbides, as well as their microstructure, classifications, applications, and physical and mechanical properties. It provides information on new tool geometries, tailored substrates, and the application of thin and hard coatings to cemented carbides by chemical vapor deposition and physical vapor deposition. The article also discusses tool wear mechanisms and the methods available for holding the carbide tool.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001104
EISBN: 978-1-62708-162-7
... of cemented carbides, which are used in a wide range of applications, including metal cutting, mining, construction, rock drilling, metal forming, structural components, and wear parts. Approximately 50% of all carbide production is used for metal cutting applications. This article discusses...
Abstract
Cemented carbides belong to a class of hard, wear-resistant, refractory materials in which the hard carbide particles are bound together, or cemented, by a soft and ductile metal binder. The performance of cemented carbide as a cutting tool lies between that of tool steel and cermets. Almost 50% of the total production of cemented carbides is used for nonmetal cutting applications. Their properties also make them appropriate materials for structural components, including plungers, boring bars, powder compacting dies and punches, high-pressure dies and punches, and pulverizing hammers. This article discusses the manufacture, microstructure, composition, classifications, and physical and mechanical properties of cemented carbides, as well as their machining and nonmachining applications. It examines the relationship between the workpiece material, cutting tool and operational parameters, and provides suggestions to simplify the choice of cutting tool for a given machining application. It also examines new tool geometries, tailored substrates, and the application of thin, hard coatings to cemented carbides by chemical vapor deposition and physical vapor deposition. It discusses the tool wear mechanisms and the methods available for holding the carbide tool. The article is limited to tungsten carbide cobalt-base materials.
Book Chapter
Pack Cementation Processes
Available to PurchaseSeries: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005775
EISBN: 978-1-62708-165-8
... processing Reactor vessels and tubing 304/316 stainless steel Cement Cooler grates Stainless steel, HP, HK Siliconizing Siliconizing, the diffusion of silicon into steel, occurs similarly to aluminizing. There are pack and retort processes in which parts are subjected to gas atmospheres...
Abstract
Pack cementation is the most widely employed method of diffusion coating. This article briefly reviews pack cementation processes of aluminizing, chromizing, and siliconizing. It contains tables that list typical characteristics of pack cementation processes and commercial applications of pack cementation aluminizing, which is used to improve the performance of steels in high-temperature corrosive environments.
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003797
EISBN: 978-1-62708-177-1
... for a wide range of wear applications including metalcutting, mining, construction, rock drilling, metal forming, structural and fluid-handling components, and wear parts. Metallographic Considerations The fine scale of cemented carbide microstructures necessitates the use of the highest practical...
Abstract
This article contains tables that list standard reduction potentials for electrochemical reactions. The first table lists reactions alphabetically by element of interest. The second table is ranked by potential value. Potential is measured versus the Standard Hydrogen Electrode which has a value of 0.0000 V. Reactions with more than one voltage indicate that results have not been reconciled. Parenthetical materials not needed to balance reactions are catalysts.
Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001280
EISBN: 978-1-62708-170-2
... of various coating materials, namely, silicate glasses, oxides, carbides, silicides, and cermets. It reviews ceramic coating methods: brushing, spraying, dipping, flow coating, combustion flame spraying, plasma-arc flame spraying, detonation gun spraying, pack cementation, fluidized-bed deposition, vapor...
Abstract
Ceramic coatings are applied to metals to protect them against oxidation and corrosion at room temperature and at elevated temperatures. This article provides a detailed account of the factors to be considered when selecting a ceramic coating and describes the characteristics of various coating materials, namely, silicate glasses, oxides, carbides, silicides, and cermets. It reviews ceramic coating methods: brushing, spraying, dipping, flow coating, combustion flame spraying, plasma-arc flame spraying, detonation gun spraying, pack cementation, fluidized-bed deposition, vapor streaming, troweling, and electrophoresis. The article also includes information on the evaluation of the quality of ceramic coatings.
Book Chapter
Surface Engineering of Carbide, Cermet, and Ceramic Cutting Tools
Available to PurchaseBook: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001320
EISBN: 978-1-62708-170-2
... of cemented carbides containing WC-TiC, WC-TiC-TaC, WC-TiC-(Ta,Nb)C, and other solid-solution cubic carbides that cover a wide range of applications, including metalcutting, mining, construction, rock drilling, metal forming, structural components, and wear parts. The commercially significant alloys...
Abstract
The classes of tool materials for machining operations are high-speed tool steels, carbides, cermets, ceramics, polycrystalline cubic boron nitrides, and polycrystalline diamonds. This article discusses the expanding role of surface engineering in increasing the manufacturing productivity of carbide, cermet, and ceramic cutting tool materials used in machining operations. The useful life of cutting tools may be limited by a variety of wear processes, such as crater wear, flank wear or abrasive wear, builtup edge, depth-of-cut notching, and thermal cracks. The article provides information on the applicable methods for surface engineering of cutting tools, namely, chemical vapor deposited (CVD) coatings, physical vapor deposited coatings, plasma-assisted CVD coatings, diamond coatings, and ion implantation.
Book Chapter
Materials Standards and Test Method Standards for Powder Metallurgy
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006019
EISBN: 978-1-62708-175-7
... of specifications and test methods for metal powders and metal powder products. Committee B09 has a number of subcommittees: B09.01 – Terminology B09.02 – Base Metal Powders B09.03 – Refractory Metal Powders B09.04 – Bearings B09.05 – Structural Parts B09.06 – Cemented Carbides B09.09 – U.S...
Abstract
The organizations that are most active in the development of standards for powder metallurgy (PM) are the American Society for Testing and Materials (ASTM), Metal Powder Industries Federation (MPIF), and International Standards Organization (ISO). This article presents the test method standards, materials standards, and material designation codes for PM materials. It provides information on the codes for structural parts, PM soft magnetic materials, PM self-lubricating bearings, metal injection molded materials, and powder forged materials.
Book Chapter
Wire, Rod, and Tube Drawing
Available to PurchaseSeries: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004008
EISBN: 978-1-62708-185-6
..., most of the wire, bar, and tubing produced is drawn through dies having diamond or cemented tungsten carbide inserts, and tube mandrels are usually fitted with carbide nibs. Small quantities, odd shapes, and large sizes are more economically drawn through hardened tool steel dies. Wire-Drawing Dies...
Abstract
The drawing process, one of the oldest metal forming operations, allows excellent surface finishes and closely controlled dimensions to be obtained in long products that have constant cross sections. This article discusses the basic mechanics and preparation steps of drawing. It presents an overview of the processes, equipment, dies and die materials, and lubrication associated with drawing of rod, wire, bar, and tube. The article also provides a discussion on the design considerations and manufacturing of commercial superconducting multifilamentary conductors.
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