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overlay coatings

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Published: 01 January 1997
Fig. 5 Volume steady-state erosion rates of weld-overlay coatings at 400 °C (750 °F) as a function of average microhardness at 400 °C (90° impact angle; alumina erodent). Source: Ref 22 More
Image
Published: 01 January 2006
Fig. 29 Duplex coating consisting of an overlay coating (O) with an aluminide layer (A) on top. There is an interdiffusion zone with the base metal (B) and another interdiffusion zone between A and O. Lactic acid etch. See the article “Corrosion of Industrial Gas Turbines” in this Volume. More
Image
Published: 01 January 2006
Fig. 11 Duplex coating consisting of an overlay coating (O) with an aluminide layer (A) on top. The interdiffusion zone with the base metal (B) is indicated by the letter I. There is another interdiffusion zone between A and O. Lactic acid etch More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... Abstract A major cause of failure in components subjected to rolling or rolling/sliding contacts is contact fatigue. This article focuses on the rolling contact fatigue (RCF) performance and failure modes of overlay coatings such as those deposited by physical vapor deposition, chemical vapor...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... and metal dusting, sulfidation, hot corrosion, chloridation, hydrogen interactions, molten metals, molten salts, and aging reactions including sensitization, stress-corrosion cracking, and corrosion fatigue. It concludes with a discussion on various protective coatings, such as aluminide coatings, overlay...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006420
EISBN: 978-1-62708-192-4
... resistance of borided surfaces. It concludes with a discussion on boronizing plus physical vapor deposition (PVD) overlay coating. abrasion resistance boronizing case hardening coefficient of friction erosion resistance ferrous material galling resistance nickel-base superalloys pack...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005712
EISBN: 978-1-62708-171-9
... Abstract This article focuses on coatings and overlays adopted for use as wear- and corrosion-resistant materials in oil sand processing. It describes the most common application processes for oil sand coatings and overlays, including welding, high-velocity oxyfuel thermal spray, laser cladding...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004158
EISBN: 978-1-62708-184-9
... of the coating is to form an oxide that maximizes the length of this incubation period. Types of Protective Coatings There are two categories of coatings used—diffusion coatings and overlay coatings. Diffusion coatings are formed by diffusing aluminum or chromium into the surface of the material...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002466
EISBN: 978-1-62708-194-8
... costly materials. It describes solidification surface treatments such as hot dip coatings, weld overlays, and thermal spray coatings. The article discusses deposition surface treatments such as electrochemical plating, chemical vapor deposition, and physical vapor deposition processes. It explains...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003212
EISBN: 978-1-62708-199-3
... the required properties. These processes include solidification treatments such as hot dip coatings, weld-overlay coatings, and thermal spray surfaces; deposition surface treatments such as electrodeposition, chemical vapor deposition, and physical vapor deposition; and heat treatment coatings...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003217
EISBN: 978-1-62708-199-3
... and their application. It also provides information on weld-overlay and thermal spray coating, porcelain enameling, and the preparation of enamel frits for steels. The article closes by describing methods and materials for ceramic coating. ceramic coatings chemical conversion coatings continuous...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006391
EISBN: 978-1-62708-192-4
... materials, namely, iron-base overlays, chromium carbide-based overlays, nickel- and cobalt-base alloys, and tungsten carbide-based metal-matrix composite overlays. It discusses the types of hardfacing processes, such as arc welding processes, and laser cladded, oxyacetylene brazing and vacuum brazing...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006422
EISBN: 978-1-62708-192-4
..., adhesion, and fatigue, as well as oxidative and corrosive wear. Surface modification techniques, such as hardening by induction heat treating, weld overlay, thermal spray coating, coating via physical vapor deposition (PVD), and laser surface treatment, are also discussed for improving roll service life...
Book Chapter

Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005560
EISBN: 978-1-62708-174-0
..., friction surfacing has been successfully developed and commercialized over the past decade. The process is used for corrosion- and wear-resistant coatings and for reclamation of worn engineering components. Friction surfacing can be considered as an alternative for fusion-based overlay coatings...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001318
EISBN: 978-1-62708-170-2
... on the application lifetime as well as on dynamic or static structural requirements. The CVD coatings are normally applied in multiple cycles to ensure even deposition rates over curved surfaces. A substrate pretreatment is normally used to enhance adherence. Silicon nitride overlay coatings have been shown...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005707
EISBN: 978-1-62708-171-9
... reactive sputtering thermal spray coating wear COATINGS AND OTHER SURFACE MODIFICATIONS are used for a variety of functional, economic, and aesthetic purposes. For example, thermal spray and weld-overlay tungsten carbide-base coatings are used to prevent excessive wear in heavy industry...
Book Chapter

Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004221
EISBN: 978-1-62708-184-9
... growth rate. The tip has oxidized, depleting the surface, while just below, the oxidized coating is protecting the blade. A severely attacked gas turbine blade is seen in Fig. 28 The micrograph ( Fig. 29 ) is of an overlay coating and an aluminide layer that protects the base material of the gas...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003120
EISBN: 978-1-62708-199-3
... methods. The article also describes the properties, microstructure, and thermal exposure of superalloys. It further discusses the effects of environmental factors on superalloys, including oxidation and hot corrosion. Protective coatings are also discussed. The article provides information...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001442
EISBN: 978-1-62708-173-3
... metal joining erosion ferrous materials hardfacing laser welding low-alloy steel metal-to-earth abrasion alloys metal-to-metal wear alloys nonferrous materials oxyfuel welding stainless steel thermal spray coating tungsten carbides wear weld cladding SURFACING, as applied to welding...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005716
EISBN: 978-1-62708-171-9
... and glass-bead peening can be used to plastically deform the surface layers of sprayed coatings. Carefully controlled peening is sometimes performed on MCrAlY overlay coatings to further densify the coating structure following heat treatment; this method thereby improves high-temperature oxidation...