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Reheating

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080259
EISBN: 978-1-62708-304-1
... (0.25) Chromized carbon steel 0.008 (0.32) Chromized 2.25Cr-1Mo 0.007 (0.28) Source: Ref 26 Results of field tests on austenitic stainless steel tubes and co-extruded tubes in the reheater of a 500 MW (e) boiler Table 10.10 Results of field tests on austenitic stainless steel...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080005
EISBN: 978-1-62708-304-1
... penetration. (b) Sample was consumed. Source: Ref 73 Results of field test in a natural-gas-fired furnace for reheating nickel-and cobalt-base alloy ingots and slabs for 113 days at 1090 to 1230 °C (2000 to 2250 °F) with frequent cycles to 540 °C (1000 °F) Table 3.20 Results of field test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080321
EISBN: 978-1-62708-304-1
... furnaces fired with low-grade fuels. This chapter provides an overview of fireside or oil-ash corrosion and the problems it can cause in utility power boilers and petrochemical refinery furnaces. It explains how oil-ash corrosion affects waterwalls, superheaters, and reheaters as well as metal tube...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490383
EISBN: 978-1-62708-340-9
...Abstract Abstract Increasing the efficiency of power plants by operating at higher temperatures and pressures and adding a double-reheat feature comes at the expense of shortened lifetimes for critical components. This chapter provides an overview of the material-related problems associated...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770051
EISBN: 978-1-62708-337-9
... Fig. 3.11 Double reheat quench. A high temperature first reheat quench refines the core, and a lower temperature second reheat quench refines the case. Fig. 3.26 The loss of surface compressive residual stresses due to the presence of a highly developed carbide zone in 20KhNV4MF steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430017
EISBN: 978-1-62708-253-2
... stack. Most modern boilers have superheaters and a reheater arrangement. A superheater is a component of a steam generating unit in which steam, after it has left the boiler drum, is heated above its saturation temperature. The steam from the drum passes to the superheater coils placed in the flue...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430290
EISBN: 978-1-62708-253-2
... of a Waste Heat Boiler Case Study 28—Failure Investigation of a Reheater Tube Coal-Ash Corrosion Oil-Ash Corrosion Case Study 25—Failure Investigation of Secondary Superheater Tube Background Details Investigation and Findings Conclusions Background Details Investigation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770037
EISBN: 978-1-62708-337-9
..., and residual stresses of a 52100 steel (1.02% C) during reheating prior to quenching Table 2.2 Effect of carbon potential on microstructure, hardness, and residual stresses of a 52100 steel (1.02% C) during reheating prior to quenching Atmosphere carbon potential, % Retained austenite, % Carbides...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430314
EISBN: 978-1-62708-253-2
... from an adjacent tube Fig. 6.128 Low-temperature reheater tube showing longitudinal rupture opening Fig. 6.129 SEM image of outer surface adjacent to rupture lip showing erosion damage, 500× Fig. 6.130 Optical micrographs showing (a) crater formed on the outer surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
... Comparative microstructures at (a) unaffected location, 1000× and (b) failure location, 1000× Fig. 6.12 Reheater tube sample showing bulging and bending at failure location with thick-lip fish-mouth rupture Fig. 6.13 (a) Close-up view of the inner surface of the tube indicating patches...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
.... Dhooge A. and Vinckier A. , Reheating Cracking—A Review of Recent Studies , Int. J. Pressure Vessels Piping , Vol 27 , 1987 , p 239 10.1016/0308-0161(87)90012-3 18. Meitzner C.F. , Stress-Relief Cracking in Steel Weldments , WRC Bull , Vol 211 , Nov 1975 19...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
... steels. Source: Ref 32 Fig. 5.21 Hardness, retained austenite, microcrack density, and bending fatigue curves for carburized and hardened SAE 8620 steel quenched by three methods: direct quench, ASTM 1-3 grain size; single reheat, ASTM 4-5 grain size; double reheat. Source: Ref 43...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480141
EISBN: 978-1-62708-318-8
..., followed by reheating at 500 °C (930 °F) for 24 h and air cooling. Etchant: 10%HF-5%HNO 3 . Original magnification: 1000× Figures 7.26 and 7.27 illustrate titanium hydride in unalloyed titanium and the Ti-5Al-2.5Sn alloy. The titanium hydride appears as very fine needles. Fig. 7.26 Pure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130537
EISBN: 978-1-62708-284-6
... 815 to 870 °C (1500 to 1600 °F). (c) This range is recommended for steel that is to be water quenched. For oil quenching, steel should be austenitized in the range 815 to 870 °C (1500 to 1600 °F). Reheating (austenitizing) temperatures for hardening of carburized carbon and alloy steels (SAE...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
... H. , and Gehl S. , Life Assessment of Superheater/Reheater Tubes in Fossil Boilers , Journal of Pressure Vessel Technology , Vol 116 ( No. 1 ), 1994 , p 1 – 16 8.2 Dongre P.R. and Rakhunde V.B. , Residual Life Assessment in High Temperature Zones of Power Plant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
.... At the roof of the furnace, the gas flow is made horizontal across banks of secondary superheater and reheater tubes. The gases are then turned downward, where they encounter the primary superheater and the economizer. Before exiting through the stack, the combustion gases are fed through an air preheater...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250039
EISBN: 978-1-62708-345-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
... steel. (a) Quenched directly after carburizing at 927 °C (1700 °F). (b) Reheated to 788 °C (1450 °F). Both specimens were tempered at 145 °C (300 °F). Fig. 34 Krauss fracture map illustrating conditions where susceptibility to intergranular cracking can be minimized: carburizing, intercritical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... alloying elements. This low carbon content in the deposit results in welds which do not readily respond to heat treatment. If complete reheat treatment after welding is desired, an electrode must be utilized having either a much higher alloy content than the base metal or a higher carbon content. A typical...