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case depth
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Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
... on core properties including hardenability, microstructure, tensile and yield strength, ductility, toughness, and fatigue resistance. It likewise explains how carbon affects case hardenability, surface hardness, and case toughness and how case depth influences residual stresses and bending and contact...
Abstract
The design of case-hardened components is an iterative process, requiring the consideration of multiple interrelated factors. This chapter walks readers through the steps involved in selecting an appropriate material and assessing the influence of alloy composition and cooling rate on core properties including hardenability, microstructure, tensile and yield strength, ductility, toughness, and fatigue resistance. It likewise explains how carbon affects case hardenability, surface hardness, and case toughness and how case depth influences residual stresses and bending and contact fatigue. It also discusses the effect of quenching methods and addresses the issue of distortion.
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Published: 01 August 1999
Fig. 12.20 (Part 1) Case carburizing: estimation of case depth by microscopical methods. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). The structure of this carburized case in the normalized condition is shown in Fig. 12.15 (Part 1) (d) and (h) . The parenthetical carbon contents are those
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Published: 01 August 1999
Fig. 12.20 (Part 2) Case carburizing: estimation of case depth by microscopical methods. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). The structure of this carburized case in the normalized condition is shown in Fig. 12.15 (Part 1) (d) and (h) . The parenthetical carbon contents are those
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Published: 01 December 2000
Fig. 5.26 Case depth profile vs. tooth pressure angle. Dashed line indicates case depth profile.
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Published: 01 September 2005
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Published: 01 June 1985
Fig. 4-40. Case crushing depends on stress applied, radius of curvature, case depth, and core hardness.
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Published: 01 March 2006
Fig. 2 Case depth as a function of carburizing time for normal carburizing (no diffusion cycle) of low-carbon and certain low-alloy steels. Curve A: Total case depth. Curve B: Effective case depth for surface carbon content of 1.1% to saturation. Curve C: Effective case depth for surface
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Published: 01 November 2012
Fig. 21 Effect of case depth on fatigue life. Fatigue tests on induction-hardened 1038 steel automobile axle shafts 32 mm (1.25 in.) in diameter. Case depth ranges given on the chart are depths to 40 HRC. Shafts with lower fatigue life had a total case depth to 20 HRC of 4.5 to 5.2 mm (0.176
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in Fundamentals of Process Control
> Elements of Induction Heating: Design, Control, and Applications
Published: 01 June 1988
Fig. 7.6 Case depth obtained by induction surface hardening of a steel bar as a function of ∫ I c 2 dt , where l c and t denote induction coil current and time, respectively. From J. D. Verhoeven, H. L. Downing, and E. D. Gibson, Journal of Heat Treating , Vol 4, No. 3, June
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Published: 01 December 1999
Fig. 4 Effect of core strength and case depth on the rolling-contact fatigue limit of gear steels. Tests involved two 4 in. disks driven by a 2 in. roller. Test piece may have been either one of the disks or the roller. Relative radius of curvature, 2/3. SH units = lb/in. of face width divided
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Published: 01 December 1999
Fig. 7 Minimum effective case depth for carburized gears, h e min . The values and ranges shown on the case-depth curves are to be used as guides. For gearing in which maximum performance is required, detailed studies must be made of the application, loading, and manufacturing procedures
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Published: 01 August 2015
Fig. 4.5 Increase in case depth with concentrators in inside-diameter coils. Coils A, C: without concentrator; coils B, D, E, F: with concentrator. Source: Ref 8
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Published: 01 December 1999
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Published: 01 December 1999
Fig. 6.30 Effect of nickel content and case depth on the bending fatigue strength of case-hardened steels. Source: Ref 36
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Published: 01 December 1999
Fig. 6.34 Effect of case depth on residual stress. Influence of internal oxidation at the surface of the deep-case test piece is also indicated. Source: Ref 40
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Published: 01 December 1999
Fig. 6.35 Effect of case depth on residual stress. Effect of carbon potential is also indicated. Source: Ref 41
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Published: 01 December 1999
Fig. 6.37 Relationship between fatigue strength and case depth for two carburized lean-alloy case-hardening steels. Source: Ref 45
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Published: 01 December 1999
Fig. 7.27 Torsional fatigue curves for carburized 18Kh2N4VA steel. Case depth, 1.5 mm. See also Table 7.14 . Source: Ref 43 Curve Treatment Temper Oil quench Subzero 1 650 °C 800 °C ... 2 650 °C 800 °C –120 °C 3 ... 800 °C –120 °C 4 ... 800 °C ... 5
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Published: 01 December 1999
Fig. 8.19 Effect of roller burnishing of a 20Kh2N4A steel (case depth, 1.1 to 1.5 mm) on hardness and depth of hardening for various rolling pressures (maximum contact stress). Source: Ref 27
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Published: 01 December 1984
Figure 6-2 Comparison of the effective case depth of a nitrided AISI 4150 alloy steel assessed by visual estimation and by microhardness (100-g) traverses (110 ×, nital). Note the heavy “white” layer at the surface.
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