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tungsten heavy alloys

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Published: 01 June 2008
Fig. 31.8 As-sintered tungsten-heavy alloy. Original magnification: 200×. Source: Ref 1 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240583
EISBN: 978-1-62708-251-8
... (W-0.25ZrO 2 ), and lanthanum oxide (W-1La 2 O 3 ) are available. Of all the tungsten alloys, those in the W-Re-HfC system have the highest strength. Tungsten-Heavy Alloys If high-temperature strength is not a requirement, more economical liquid-phase sintered alloys can be used. Tungsten...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170308
EISBN: 978-1-62708-297-6
...%) Dispersion-strengthened alloys containing 1 to 2% ThO 2 , or tungsten-rhenium alloys with a dispersion of ThO 2 or HfC added Tungsten heavy alloys , which consist of tungsten-nickel-iron, tungsten-nickel-iron, and tungsten-nickel-cobalt Composite tungsten-copper or tungsten-silver alloys...
Image
Published: 01 December 2001
Fig. 7 Typical microstructure of a liquid-phase sintered W-7Ni-3Fe heavy alloy showing the spheroidized tungsten phase in a solid solution binder More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850543
EISBN: 978-1-62708-260-0
... with solution 2. Add solution dropwise and polish 15-30 s (Boyd). 543 544 METALLOGRAPHY Material Beryllium Beryllium Beryllium Bismuth Bismuth Chromium Chromium Chromium Tungsten Cr-Si alloys (2-76 atomic wt % Si) Copper Brass (high Zn content) Copper Copper Copper Cu-30%Zn alloy Attack-polishing solution...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170573
EISBN: 978-1-62708-297-6
... material has been modified to produce a variety of cemented carbides containing tungsten carbide, titanium carbide, and cobalt (WC-TiC-Co), and more complex tungsten carbide-cobalt alloys containing titanium carbide, tantalum carbide, and niobium carbide (WC-TiC-(Ta,Nb)C-Co) as well as other solid-solution...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900007
EISBN: 978-1-62708-358-4
.... The high-alloy content of the H steels also provides excellent hardenability and permits the hardening of heavy sections by air cooling. Tungsten Hot-Work Tool Steels Tungsten hot-work tool steels have much greater resistance than the chromium hot-work steels to softening during high-temperature...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900219
EISBN: 978-1-62708-358-4
... according to the alloying approach: chromium hot-work steels, tungsten hot-work steels, and molybdenum hot-work steels. This chapter discusses the composition, characteristics, applications, advantages, and disadvantages of each of these steels. chemical composition hardness hot-work tool steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... Abstract This article discusses the weldability and fusion weld properties of refractory metal alloys. The alloys discussed include tantalum, niobium, rhenium, molybdenum, and tungsten. molybdenum niobium rhenium tantalum tungsten weldability THE REFRACTORY METALS, which include...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290023
EISBN: 978-1-62708-306-5
... a nonconsumable tungsten alloy electrode and the work metal ( Fig. 2.11 ). The electrode, weld pool, arc, and adjacent heated areas of the workpiece are protected from atmospheric contamination by a gaseous shield. This shield is provided by a stream of gas, usually an inert gas or a mixture of gases. The gas...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 May 2018
DOI: 10.31399/asm.tb.hma.t59250073
EISBN: 978-1-62708-287-7
... of alloys for tool steels. The chapter provides information on the research investigations into the metallurgy of high-speed tool steels at MIT, Union Carbide, and Carbon Laboratories. The major research effort involved in substituting molybdenum for tungsten in high-speed tool steels is discussed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170495
EISBN: 978-1-62708-297-6
... corrosion and oxidation resistance. The degree of solution hardening has been related to the atomic size difference between nickel and the alloying element, and therefore the ability of the solute to interfere with dislocation motion. Tungsten, molybdenum, niobium, tantalum, and aluminum, when aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... resistance to the Ni-Cr-Mo and Ni-Mo alloys a solution anneal heat treatment should be performed after welding. Heat-Resistant High Alloy Steels The heat-resisting grades are also subject to microfissuring in heavy sections, but to a lesser extent than the high nickel, lower carbon corrosion grades...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410621
EISBN: 978-1-62708-265-5
... Tools steels are defined by their wear resistance, hardness, and durability which, in large part, is achieve by the presence of carbide-forming alloys such as chromium, molybdenum, tungsten, and vanadium. This chapter describes the alloying principles employed in various tool steels, including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... the welding processes that are adaptable to titanium and its alloys. Acceptable processes include gas tungsten arc, plasma arc, gas metal arc, electron beam, friction stir, and resistance spot and seam welding methods where, depending on the method, inert gas, vacuum, and/or metal contact provide the required...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280189
EISBN: 978-1-62708-267-9
...-base superalloys, which have descended from stainless steels, usually machine more easily than the nickel-base and cobalt-base superalloys under similar conditions of heat treatment. However, the iron-base alloys do present chip-breaking problems, which often require special tool geometries...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000059
EISBN: 978-1-62708-313-3
... ). Fig. 5.6 Influence of molybdenum content on γ′ solvus for a Ni-Cr-Al-Ti-Mo alloy. Source: Ref 27 5.6.2 Tungsten Tungsten is a heavy refractory element with the highest melting point of 3407 °C, (6165 °F) of any metal and a density of 19.3 g/cm 3 (0.7 lb/in. 3 ), which is slightly lower...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060273
EISBN: 978-1-62708-261-7
... to machine and cut materials at high speeds. They are complex iron-base alloys of carbon, chromium, vanadium, molybdenum, or tungsten, or combinations thereof. In some cases they may contain substantial amounts of additional alloying elements such as cobalt. The carbon and alloy contents are balanced...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240563
EISBN: 978-1-62708-251-8
... are so highly alloyed that they cannot even be produced in wrought forms; they must be produced by alternate routes, such as casting or powder metallurgy. Superalloys are relatively heavy, with densities in the range of 7.8 to 9.4 g/cm 3 (0.282 to 0.340 lb/in. 3 ). Density is influenced by alloying...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.9781627082976
EISBN: 978-1-62708-297-6