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thermal spray equipment

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
... Thermal Spray Repairs Thermal spraying, with its great compositional flexibility and minimal thermal effects on substrates, would seem to be an obvious candidate for repairing erosion damage. Those benefits notwithstanding, as-sprayed deposits have not been very successful in resisting liquid impact...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001043
EISBN: 978-1-62708-214-3
... that plant startup and shutdown procedures be modified to reduce or eliminate the presence of the carburizing gas mixture. Carburization (corrosion) Chemical processing equipment Heat shields Thermal fatigue 304 UNS S30400 Brittle fracture Thermal fatigue fracture High-temperature corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... Fatigue of a BWR Recirculation-Pump Shaft The thermal fatigue cracking of main coolant pump shafts has become a significant and recurrent problem in both BWR and PWR nuclear power plants. 8 , 12 These pumps circulate reactor coolant at temperatures of about 288 °C (550 °F) and are equipped...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
...: change in the environment; change in the alloy or heat treatment; change in design; use of galvanic protection; use of inhibitors; use of nonmetallic coatings and liners; application of metallic coatings; use of surface treatments, thermal spray, or other surface modifications; corrosion monitoring...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
...Abstract Abstract This article explains the main types and characteristic causes of failures in boilers and other equipment in stationary and marine power plants that use steam as the working fluid with examples. It focuses on the distinctive features of each type that enable the failure...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001358
EISBN: 978-1-62708-215-0
... were made by the original equipment manufacturer (OEM). Specimen Selection Most of the cracks were located directly below the shroud/blade seal weld. Several welds, along with their respective fracture faces, were removed and prepared for examination. Visual Examination of General Physical...
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
... in boilers are employing thicker tubes of the same material; shielding tubes with clamp-on protectors; coating with thermal sprayed, corrosion-resistant materials; blending coals to reduce corrosive ash constituents; replacing tubes with higher-grade alloys or coextruded tubing; lowering final steam outlet...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... ). Such costs include the cost of corrosion-control methods, equipment, and services; cost of labor attributed to corrosion management; cost of using more expensive materials to lessen corrosion damage; and cost of lost revenue, loss of reliability, and loss of capital due to corrosion deterioration...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
...Abstract Abstract Failures in boilers and other equipment taking place in power plants that use steam as the working fluid are discussed in this article. The discussion is mainly concerned with failures in Rankine cycle systems that use fossil fuels as the primary heat source. The general...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001408
EISBN: 978-1-62708-220-4
... in temperature. The material was a steel in the normalized condition with a 0.35% C content. It appears probable that deficient lubrication of the gland resulted in overheating of the rod due to friction. The presence of a sprayed-metal coating was probably an additional factor in promoting failure, as it would...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
... one-dimensional heating or cooling can be estimated from ( Ref 6 ): (Eq 2) σ = E ⋅ ε = E ⋅ 1 3 ( Δ V / V ) = E ⋅ α ⋅ Δ T where σ is stress, ε is strain, E (modulus of elasticity) = 2 × 10 5 N/mm 2 , and α (coefficient of thermal expansion) = 1.2 × 10 −5...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
... demand periods only. The cyclic thermally induced stresses associated with frequent startups and shutdowns are often more severe than stresses of steady-state operations, and designers cannot always predict the fatigue of equipment that owner-operators impose. Economics frequently dictate that use...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... processing requirements should also be noted. Special processing or finishing treatments, such as shot peening, fillet rolling, burnishing, plating, thermal spraying, and painting, can influence performance, and the analyst should be aware of such treatments. Mechanical Conditions How a shaft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
...Abstract Abstract Vibration analysis can be used in solving both rotating and nonrotating equipment problems. This paper presents case histories that, over a span of approximately 25 years, used vibration analysis to troubleshoot a wide range of problems. Current testing Fans Generators...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... distortion caused by either the operating stresses or thermal differentials. Depending on the severity, it may be necessary to shim the reducer supports, and several trials may be needed. It is important to understand that there will always be some elastic deformation of the teeth. Therefore, what appears...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... on the inside of the tube, or conversely. Therefore, thermal conductivity, wall thickness, and resistance to scaling are extremely important. In most cases, tensile strength and yield strength of the tubes are not significant factors; loading, because it is opposed by the internal pressure, is so low that tubes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0089617
EISBN: 978-1-62708-232-7
... sticking to the bore surface. Recommendations included reducing the pouring temperatures of the molten metal and spraying a thicker insulating coating onto the mold surface. Centrifugal casting Foundry practice Molds Overheating 4130 UNS G41300 Casting-related failures The forged 4130...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
..., which is the monitoring of welder and equipment performance and of the quality of the consumables and the base materials used Acceptance or rejection of a weld on the basis of its fitness for purpose under the service conditions imposed on the structure, and typically governed by a construction code...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... metal droplets deposited on a surface at high velocity; similar structures are intentionally formed by thermal spray coating. Energy-dispersive x-ray spectroscopy analysis of the metallic portions of the deposit revealed a chemical composition consistent with that of the first-stage blade alloy IN-700...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
...Abstract Abstract Heat exchangers are devices used to transfer thermal energy between two or more fluids, between a solid surface and a fluid, or between a solid particulate and a fluid at different temperatures. This article first addresses the causes of failures in heat exchangers...