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hardfacing

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Published: 01 June 2008
Fig. 21.11 Welding processes used for hardfacing. Adapted from Ref 5 More
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Published: 01 June 2008
Fig. 21.12 Thermal spraying processes used for hardfacing. Adapted from Ref 5 More
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Published: 01 October 2011
Fig. 16.13 Thermal fatigue crack produced in the hardfacing alloy on an exhaust valve from a heavy-duty gasoline engine More
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Published: 30 November 2013
Fig. 8 Thermal-fatigue crack in the hardfacing alloy on an exhaust valve from a heavy-duty gasoline engine (~2.5×). Advanced burning originated from the large crack. Additional thermal-fatigue cracks are also present on the valve face. Engine efficiency rapidly deteriorates from increasing More
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Published: 01 November 2007
Fig. 10.95 One tube with a proprietary HF35 hardfacing weld overlay showing manually applied weld overlay beads along the tube that are still visible after exposure for approximately 3 years as part of an in-bed evaporator tube bundle in a 130 MWe bubbling fluidized-bed boiler. Courtesy More
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Published: 30 April 2021
Fig. 7.12 Hardfacing on the sides of an excavator shovel More
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Published: 30 April 2021
Fig. 9.18 Hard phases in a nickel-base hardfacing alloy (54 HRC) magnified 400×. A, chromium borides; B, Ni eutectic; C, nickel borides More
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Published: 30 April 2021
Fig. 10.17 Cermet hardfacing containing carbide spheres in a metal matrix. Original magnification: 100× More
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Published: 01 December 2015
Fig. 4 Hardfaced stainless steel plug and seat, from a slurry flow control valve, that were eroded by high-velocity flow through the narrow orifice created during throttling More
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Published: 30 November 2013
Fig. 7 Self-sharpening of a digging tooth from ground-contact equipment by controlled wear through selective hardfacing. The pattern of hardfacing can be varied to suit the condition, but note that the blunt tooth is hardened on both sides, while the self-sharpening tooth is hardened on only More
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Published: 01 November 2012
Fig. 9 Self-sharpening of a digging tooth from ground-contact equipment by controlled wear through selective hardfacing. The pattern of hardfacing can be varied to suit the condition, but note that the blunt tooth is hardened on both sides, while the self-sharpening tooth is hardened on only More
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Published: 01 November 2007
Fig. 10.94 Scanning electron micrograph (backscattered electron image) showing various hardface particles in the proprietary tungsten carbide based hardfacing weld overlay, HF60. The results (wt%) of semiquantative EDX analyses of various phases are summarized as: Light color phases (A, B, C More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
..., liquid nitriding, carbonitriding, and hardfacing. The chapter describes two surface hardening processes by localized heat treatment: flame hardening and induction hardening. It also briefly summarizes other surface hardening processes, namely, aluminizing, siliconizing, chromizing, titanium carbide...
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Published: 01 November 2012
Fig. 8 Diagram of self-sharpening plowshare. As the plowshare cuts through the soil from the right to left, the relatively soft steel on the forward high-stress side is gradually worn away, but the hardfacing applied to the rear low-stress side is continually exposed at the sharp tip. Source More
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Published: 01 November 2007
Fig. 10.102 The surface of HF35 weld overlay tube at the windward side after exposure for 2 years as part of the hanger tube for the economizer in a circulating fluidized-bed boiler. The overlay contained hardfacing chromium eutectic carbides (dark phases) formed along interdendritic More
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Published: 01 November 2007
Fig. 10.93 Cross sections of test tube samples showing wear profiles for (a) Type 309 overlay tube, (b) alloy 625 overlay tube, (c) Type 312 overlay tube, and (d) HF60 hardfacing overlay tube after exposure for 14,021 h as part of the in-bed evaporator tubes in a 130 MWe bubbling fluidized-bed More
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Published: 30 November 2013
Fig. 14 (a) Incipient burning on the valve face of an automotive engine exhaust valve caused by microporosity in the hardfacing alloy (~2.5×). (b) Severe, destructive burning (guttering) in an automotive-engine exhaust valve (~2×). The very hot exhaust gases (blowby) rushing through the cavity More
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Published: 30 November 2013
Fig. 6 Diagram of self-sharpening plowshare using the same principle as shown in Fig. 5 . As the plowshare cuts through the soil from the right to the left, the relatively soft steel on the forward, high-stress side is gradually worn away, but the hardfacing applied to the rear, low-stress More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300335
EISBN: 978-1-62708-323-2
... buildups of 100 or more micrometers; some have buildup limits of a few micrometers; and then there are hardfacings that can add millimeters to a surface. A similar situation exists on penetration into a material. Some treatments, such as ion implantation, only alter a few micrometers, while cryotreatment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350001
EISBN: 978-1-62708-315-7
... plating Improved corrosion resistance (nickel-phosphorus) and wear resistance (nickel-phosphorus and nickel-boron) Mechanical plating Improved corrosion resistance Weld overlays Improved wear resistance (hardfacing alloys) and corrosion resistance (stainless steel or nickel-base overlays...