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gas nitriding

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Published: 01 December 2003
Fig. 3 Schematic of a simple ammonia gas nitriding furnace More
Image
Published: 01 December 2003
Fig. 1 Simple schematic arrangement of an ammonia gas nitriding system. A, bulk storage tank; B, gas nitriding furnace; C, gas dissociation test station; D, exhaust to atmosphere. Source: Pye Metallurgical Consulting Inc. More
Image
Published: 30 April 2024
Fig. 4.11 Vacuum gas nitriding furnace. Source: Ref 1 More
Image
Published: 01 December 2003
Fig. 3 Comparative hardness of plasma nitrided versus gas nitrided type 422 stainless steel. Courtesy of Seco/Warwick Corporation More
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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320133
EISBN: 978-1-62708-347-8
... Abstract Nitriding is a case-hardening process used for alloy steel gears and is quite similar to case carburizing. Nitriding of gears can be done in either a gas or liquid medium containing nitrogen. This chapter discusses the processes involved in gas nitriding. It reviews the effects...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250227
EISBN: 978-1-62708-345-4
... Abstract Nitriding is a surface hardening heat treatment that introduces nitrogen into the surface of steel while it is in the ferritic condition. Gas nitriding using ammonia as the nitrogen-carrying species is the most commonly employed process and is emphasized in this chapter. Nitriding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900111
EISBN: 978-1-62708-350-8
... Abstract A fluidized-bed furnace system can be used for the gas nitriding process. This chapter focuses on fluidized-bed nitriding. It discusses the methods of heating a fluidized bed. The heating system can be electrical or gas, and internal or external. The chapter describes nitriding...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900185
EISBN: 978-1-62708-350-8
... Abstract This chapters reviews the various process, material, and post-treatment problems that can occur in nitriding and how to troubleshoot them. The troubleshooting methods discussed relate to gas nitriding, salt bath nitriding, and ion nitriding. gas nitriding ion nitriding salt...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900163
EISBN: 978-1-62708-350-8
... Abstract Stop-off coatings prevent nitriding of selected areas on components. This chapter discusses the processes, advantages, and disadvantages of stop-off techniques for gas nitriding, salt bath nitriding, and ion nitriding. gas nitriding ion nitriding salt bath nitriding stop-off...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
... Abstract This chapter discusses the process characteristics, advantages, disadvantages, and applications of various processes involved in surface hardening of steel. These include pack carburizing, liquid carburizing, gas carburizing, vacuum carburizing, plasma carburizing, gas nitriding...
Image
Published: 01 June 2008
Fig. 21.9 Effect of one- and two-stage nitriding on white layer. (a) Single stage, gas nitrided for 24 h at 525 °C (975 °F). (b) Double stage, gas nitrided for 5 h at 525 °C (975 °F) followed by second stage at 565 °C (1050 °F) for 24 h. Original magnification: 400×. Source: Ref 1 More
Image
Published: 01 November 2013
Fig. 26 Effect of one- and two-stage nitriding on white layer. (a) Single stage, gas nitrided for 24 h at 525 °C (975 °F). (b) Double stage, gas nitrided for 5 h at 525 °C (975 °F) followed by second stage at 565 °C (1050 °F) for 24 h. Original magnification: 400×. Source: Ref 13 More
Image
Published: 01 November 2007
Fig. 4.26 Nitriding depth of Type 304SS in ammonia (100% in the inlet gas and 60% in the exhaust) at 525 °C (980 °F) as a function of exposure time. Source: Ref 4 More
Image
Published: 01 December 2003
Fig. 1 Ion nitriding furnace incorporating process gas control analysis system. (a) Furnace layout. (b) Schematic of equipment layout. Source: Ref 1 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320159
EISBN: 978-1-62708-347-8
.... The workpiece, in this case, a gear, forms the cathode, whereas the vessel wall is the anode. The vessel is evacuated prior to nitriding. Gas containing nitrogen is then introduced, and the treatment pressure in the vessel is set to between 0.1 to 10 torr (0.13–13.3 × 10 2 Pa). At this point, electric voltage...
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Published: 01 December 1999
by the relative radius of curvature. Steel Effective case depth, mm (in.) Through hardened (various) ... Flame hardened (PCS) ... Induction hardened (4340) 3.75(0.15) Gas nitrided and salt-bath nitrided 0.14(0.005) Sulphinuz treated 0.17(0.007) Gas nitrided (80 h) (3%Cr-Mo) 0.35 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
... testing AN ALTERNATIVE to the gas nitriding process was sought in the mid-1930s that would produce a more uniform and better metallurgically formed case. Notable chemical companies conducted many experiments to find an appropriate alternative method. A liquid, researchers thought, would fulfill...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900001
EISBN: 978-1-62708-350-8
... instrumentation and methods. Examples of process parameters for gas nitriding include: Furnace temperature Process control (see discussion below) Time Gas flow Gas activity control Process chamber maintenance All these factors help to reduce distortion during the process...
Image
Published: 01 December 2003
Fig. 16 H13 steel, heated to 1030 °C (1890 °F) in a vacuum, quenched in nitrogen gas, triple tempered at 510 °C (950 °F), surface activated in manganese phosphate, and gas nitrided 24 h at 525 °C (975 °F). White surface layer is iron nitride. Grain-boundary networks of nitride are present More