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molten salt bath

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Published: 01 November 2011
Fig. 7.8 Principal types of furnaces used for molten-salt-bath dip brazing applications: (a) and (b) externally heated; (c) and (d) internally heated. Source: Ref 7.8 More
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Published: 01 November 2007
Fig. 15.10 Corrosion of Ni-Cr-Fe-Mo alloy in a molten CaCl 2 -NaCl salt bath at 570 °C (1050 °F) for 6 months. (a) Little corrosion at the area not cold worked (away from the sheared edge). (b) Intergranular attack at the cold worked area (specimen sheared edge). Source: Ref 14 More
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
... procedure and identified by the Society of Automotive Engineers (SAE) designation of AMS 2755. The process simply involves: Preheating Immersion into the molten salt bath Cooling in still air or a suitable quench medium Postwashing Optional polishing or oiling The surface finish...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440055
EISBN: 978-1-62708-262-4
... is the immersed electrode salt bath or a fluidized bed. While all three modes of heating are utilized in a molten salt, molten metal bath, or a fluidized bed, conduction plays an important role because the hot medium is in direct contact with the work-metal surfaces. Convection Convection involves...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900201
EISBN: 978-1-62708-350-8
... ). Melonite Process The Melonite process, also known as Meli 1, uses a molten salt bath of a special composition. It provides a wear- and scuff-resistant surface on steels, sintered irons, cast irons, and similar materials. Treated parts exhibit excellent wear and corrosion resistance and good sliding...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140117
EISBN: 978-1-62708-264-8
.... It also discusses the use of various quenchants, including oil, polymer, and molten salt, and explains how to measure and compare their performance using a standard (ISO 9950) test. austempering cooling performance martempering molten salt bath quenchants oil quenchants polymer quenchants...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
... of scale and how it can be removed via belt grinding, abrasive blasting, and molten salt descaling baths. It also discusses the role of acid pickling, barrel finishing, polishing, and buffing as well as the use of chemical conversion coatings and protective platings. barrel finishing chemical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080409
EISBN: 978-1-62708-304-1
... by molten chloride salts. Figures 15.7 and 15.8 show typical intergranular corrosion by molten chloride salt. Figure 15.7 shows the intergranular attack of a Ni-Cr-Fe alloy (alloy 600) coupon welded to a heat treat basket that underwent heat treat cycles involving a molten KCl salt bath at 870 °C...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900109
EISBN: 978-1-62708-358-4
... product that fails to meet tool life expectations and does not justify its high initial expense. Furnaces for heat treatment of tool steels include ceramic-lined salt bath furnaces, vacuum furnaces, controlled-atmosphere furnaces, and fluidized-bed furnaces. Salt Bath Furnaces Molten salts...
Image
Published: 01 December 2003
Fig. 19 Microstructures of various ferritic materials that have undergone salt bath nitrocarburizing. All etched in 3% nital. All 500×. Courtesy of Kolene Corp. (a) Ferritic nodular iron; 90 min at 580 °C (1075 °F), oxidizing molten salt quench. (b) Low-carbon steel; 90 min at 580 °C (1075 °F More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440141
EISBN: 978-1-62708-262-4
... explanation of this process is given in Ref 7 . Liquid Carburizing The term “liquid carburizing” should not be confused with drip carburizing. Liquid carburizing is a method of case hardening ferrous metal parts by holding them above their transformation temperature in a molten salt bath. The salt...
Image
Published: 01 November 2007
Fig. 15.7 Intergranular attack of a Ni-Cr-Fe alloy coupon welded to a heat treat basket after service for 1 month in a heat treat operation cycling between a molten KCl bath at 870 °C (1600 °F) and a quenching salt bath of molten sodium nitrate-nitrite at 430 °C (800 °F). Source: Ref 13 More
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Published: 01 November 2007
Fig. 12.2 Cooling curve at the surface and center of a martempered bar of 5140 steel superimposed on the continuous transformation curve. Solid curves are molten salt quench baths; dashed curves are hot oil quench baths More
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Published: 01 December 2003
Fig. 2 Ferritic nodular iron, salt bath nitrided 90 min at 580 °C (1075 °F), oxidizing molten salt quenched. 500×, nital etch. Courtesy of Kolene Corp. More
Image
Published: 01 January 1998
Fig. 6-15 Fluidized-bed heating compared with conventional immersion heating (molten salt and molten lead baths) and convection heating for 16 mm (⅝ in.) diam steel bars. Source: Ref 7 More
Image
Published: 01 December 2003
Fig. 3 SAE 5115 (UNS G51150), chromium-manganese low-carbon steel, salt bath nitrided 90 min at 580 °C (1075 °F), oxidizing molten salt quenched. 500×, nital etch. Courtesy of Kolene Corp. 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...
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Published: 01 November 2007
Fig. 15.9 Corrosion attack consisting of voids in a nickel-base alloy after 2 months at 870 °C (1600 °F) in a molten BaCl 2 salt bath. Source: Ref 13 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240177
EISBN: 978-1-62708-251-8
... cooling, the parts can be transferred between constant-temperature molten salt baths. The steel is also protected from scaling and oxidation by the molten bath. These salts are various mixtures of compounds such as alkali metal hydroxides and nitrates that are chosen for particular temperature ranges...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... temperature. Because the steel is thin, it will cool to the quench bath temperature throughout its volume before any of the austenite has decomposed. The steel is held in the molten bath until the austenite is completely transformed, and it is then cooled to room temperature and examined with a microscope...