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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: 01 December 2003
Fig. 3 Comparative hardness of plasma nitrided versus gas nitrided type 422 stainless steel. Courtesy of Seco/Warwick Corporation 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 2003
DOI: 10.31399/asm.tb.pnfn.t65900111
EISBN: 978-1-62708-350-8
... resistance elements: (1) pivoting cover in two parts; (2) insulation; (3) refractory material; (4) fluidized bed; (5) heating elements; (6) intake for fluidizing gas; (7) parts to be treated. Source: Ref 1 Abstract A fluidized-bed furnace system can be used for the gas nitriding process...
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 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
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
... 0.762 0.030 0.127 0.005 Double-stage gas nitriding cycles Table 6.6 Double-stage gas nitriding cycles Steel Cycle Effective case depth at 50 HRC Maximum white layer thickness Minimum hardness at surface, Rockwell 15 N Core hardness, HRC mm in. mm in. Nitralloy 135M 10...
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
... in nitriding and how to troubleshoot them. The troubleshooting methods discussed relate to gas nitriding, salt bath nitriding, and ion nitriding. Loss of Gas Dissociation Surface Discoloration Case Exfoliation Gas Nitriding Surface Cleanliness Orange Peel Effect Case Crushing Salt Bath...
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
... in. 2–5 1.524 0.060 0.381 0.015 6–10 1.270 0.050 0.254 0.010 12–20 0.762 0.030 0.127 0.005 Double-stage gas nitriding cycles Table 5 Double-stage gas nitriding cycles Steel Cycle Effective case depth at 50 HRC Maximum white layer thickness Minimum hardness...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900163
EISBN: 978-1-62708-350-8
...-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. Electroplating Paint-On Methods Methods for Selective Salt Bath Nitriding...
Image
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
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320159
EISBN: 978-1-62708-347-8
... of these profiles were far superior to any gas-nitrided gears as illustrated in Fig. 7.7 and 7.8 . The white layer was measured as 0.005 mm (0.0002 in.). No evidence of microcracks, heavy grain boundary nitrides, or decarburization was observed at the case. The core microstructure was essentially tempered...
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
... parameters apply to the design of the salt bath process as to gas nitriding. However, the salt bath furnace tends to be a more compact unit that occupies less floor space than its gas nitriding counterpart. In addition to batch-type equipment, continuous systems are available for salt bath nitriding...
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
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900001
EISBN: 978-1-62708-350-8
...-nitrogen equilibrium diagram. The δ-phase, not shown on this diagram, exists from 11.0 to 11.35% N at temperatures below approximately 500 °C (930 °F). Fig. 3 Schematic of a simple ammonia gas nitriding furnace Fig. 4 Simple schematic of the layout of an early plasma (ion) nitriding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900139
EISBN: 978-1-62708-350-8
... Fig. 1 Ion nitriding furnace incorporating process gas control analysis system. (a) Furnace layout. (b) Schematic of equipment layout. Source: Ref 1 Fig. 2 Commencement of nitride formation on a steel surface. Note: The hydrogen now acts as a reducing agent. Source: Ref 3...
Image
Published: 01 December 2003
Fig. 17 18% Ni maraging steel (300 CVM), solution treated 1 h at 815 °C (1500 °F), surface activated, and gas nitrided 24 h at 440 °C (825 °F). Etching has made the nitride surface layer and grain-boundary nitrides appear black. Modified Fry’s reagent. 1000× More