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Salt pots

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380017
EISBN: 978-1-62708-456-7
... is usually preferred for the latter. Less expensive welded pots may be fabricated from either of these materials. Fig. 2.10 Externally heated salt-bath furnaces for liquid carburizing. (a) Gas fired or oil fired. (b) Resistance heated. Source: Ref 1 A flange usually supports salt pots...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900053
EISBN: 978-1-62708-350-8
... and desludging the bath before the start of the shift Weekly Maintenance Weekly maintenance consists of: Checking the cleanliness of the bath around the top (that is, the part above salt level) Removing the salt pot and checking the integrity of the external surfaces, especially if the salt...
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Published: 30 April 2024
Fig. 3.7 Salt-bath furnace used for neutral heating applications. Furnace features a ceramic pot and over-the-top (immersed) electrodes. Source: Ref 1 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900193
EISBN: 978-1-62708-350-8
... by the introduction of a titanium aeration tube. The aeration tube passes air through the molten salt from the bottom of the salt pot. The system requires good operational maintenance in terms of regular bath desludging, salt analysis, and periodic regeneration. This requires raising the bath temperature to 575 °C...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900231
EISBN: 978-1-62708-350-8
..., semicontinuous and continuous operations are possible. Two typical salt bath lines are shown in Fig. 1 and 2 . The equipment relies on a salt bath pot constructed of a material that is nonreactive with the process salt. The pot can be made entirely of titanium or can be titanium lined to reduce the capital...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440055
EISBN: 978-1-62708-262-4
... impairs the quenching action and poses a cleaning problem. Very few lead-pot furnaces are still being used, and for the most part, they have been replaced by molten salt bath furnaces. Molten Salt Baths Molten salt baths offer several distinct advantages: (a) salts are available for operation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900109
EISBN: 978-1-62708-358-4
... can be found in Ref 1 . Immersed-Electrode Salt Bath Furnaces Ceramic-lined furnaces with immersed (over-the-side) electrodes ( Fig. 6-1 ) have greatly extended the useful range and capacity of molten salt equipment compared to externally heated pot furnaces. The most important...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900201
EISBN: 978-1-62708-350-8
... characteristics. The process salt bath is mainly an alkali cyanate plus an alkali carbonate melted in a steel pot and fitted with an aeration system (as in the original Tufftride process). The cyanate component thermally reacts with the component surface to form alkali carbonate. Either continuously...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140107
EISBN: 978-1-62708-264-8
... equal to 1 h per inch of thickness. When working with propane-fired furnaces having considerable gas flow, as is often done by bladesmiths, the times to achieve the austenitization temperature can be significantly reduced. Similarly, austenitizing in salt pots will reduce times to heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380153
EISBN: 978-1-62708-456-7
... Abstract This chapter details suitable steels for gas nitriding and discusses conventional gas nitriding, plasma (Ion) nitriding, the ferritic nitrocarburizing processes, gaseous ferritic nitrocarburizing, plasma nitrocarburizing, and the salt-bath ferritic nitrocarburizing processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140071
EISBN: 978-1-62708-264-8
...; no cold working was employed. The steels were heated by immersion in a salt pot. Initially, the steels were austenitized for 15 min at 900 °C (1650 °F) and oil quenched in rapidly stirred oil. Then, the steels were given three thermal cycles consisting of a 4 min austenitization in 790 °C (1450 °F) salt...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380039
EISBN: 978-1-62708-456-7
... cover is used at higher temperatures, there is still a possibility of carburizing parts. Fig. 3.7 Salt-bath furnace used for neutral heating applications. Furnace features a ceramic pot and over-the-top (immersed) electrodes. Source: Ref 1 Some heat treating shops test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
.... 2.8 , one heats very thin steel samples to the austenite phase field above the Ae 1 and then quickly transfers the specimens into a salt (or lead) pot held at a constant temperature below the Ae 1 . Thin samples must be used in order to minimize surface-to-center temperature gradients. When quenched...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230093
EISBN: 978-1-62708-298-3
... beryllium salts. A hydrous beryllium compound is only partly ionic. Beryllium exhibits an ionic radius of 0.31 Å, resulting in a high charge-to-radius ratio ( z / r ) of 6.45 [ Pauling 1960 ]. With this high z / r value, beryllium compounds have a covalent character. The z / r value compares well...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 May 2018
DOI: 10.31399/asm.tb.hma.t59250107
EISBN: 978-1-62708-287-7
... the alumina for the electrolytic processing to aluminum metal. The only available source of the natural cryolite was in Greenland, where it was mined and sold exclusively to the Pennsylvania Salt Company Mine in the United States. World War I By the start of World War I, Alcoa had fully integrated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170432
EISBN: 978-1-62708-297-6
... of assemblies can prevent galvanic corrosion. Because chloride solutions are particularly corrosive to magnesium and magnesium alloys, the following discussion will address the effects of various alloying/residual elements on salt water/salt spray corrosion performance. More detailed information...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
.... The molten material is contained in a “pot” furnace heated by oil, gas, or electricity. A variety of different furnace designs are shown in Fig. 7.8 . In some instances, electrical-resistance heaters are used in the bath. Fig. 7.8 Principal types of furnaces used for molten-salt-bath dip brazing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480001
EISBN: 978-1-62708-318-8
...-mold furnace, circumvention of hydrogen embrittlement due to inadequate vacuum melting, chemical cleaning and use of gas furnaces, and hot salt stress-corrosion cracking due to chlorides on stressed specimens above 3000 °C (5400 °F). During the early 1950s, the value of aluminum, manganese...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310285
EISBN: 978-1-62708-326-3
.... (b) For 0.25 Si type, 183 to 207 HB; for 1.00 Si type, 207 to 229 HB. (c) Temperature varies with carbon content: 0.60 t 0.90 C, 740 to 790 °C (1360 to 1450 °F); 0.90 to 1.40 C, 760 to 790 °C (1400 to 1450 °F). Atmosphere furnaces, salt baths, vacuum furnaces, or lead pots may be used...