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tooth-by-tooth hardening

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... at that time by Caterpillar. Caterpillar must be considered the early pioneer in the contour hardening of gear teeth. Fig. 1.1 Hardness survey (Rockwell C scale) of hardened tooth, sectioned on center. Magnified 2¾ diameters. Source: Ref 1 Progress in research in metallurgical principles...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... in tooth profiles, represent unique applications. External spur and helical gears, bevel and worm gears, internal gears, racks, and sprockets are good examples of the kinds of gears of which the size can range from less than 6 mm (0.25 in.) to greater than 3 m (12 feet). As with shafts, the hardened...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050057
EISBN: 978-1-62708-311-9
.... Source: Ref 12 Virtually any of the above coil configurations can be wound into special shapes to heat specific areas of parts. Figure 4.38 shows a single-shot coil oriented for longitudinal, single-shot hardening. Figure 4.39 shows an example of a coil built for single-tooth gear hardening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
... Reduction of the quantity of rejected parts in terms of required size and shape of the hardened layer and workpiece distortion and cracking Figure 26 shows two hardening procedures for tooth profiles of gear wheels using appropriate induction coils with a ferritic core concentrating the magnetic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
.... Arkhipov I. Y. and Polotskii M.S. (quoting Semencha), Tooth Bending Life of Case-Hardened Gears with Cores of Different Hardness , Russian Engineering Journal , 1972 , Vol LII ( No. 10 ), p 28 – 30 20. Chesters W.T. , Contribution to Session IV: Materials Selection Criteria...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770001
EISBN: 978-1-62708-337-9
... of gear designs, and that material variability and process variability do exist. These basic allowable stresses are derived from actual gear tests and are set at a lower value than that of failure stress. For example, in Fig. 2 , the surface-hardened test gears failed due to tooth pitting at contact...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630169
EISBN: 978-1-62708-270-9
... and thermal characteristics. Slight, controlled grinding wear may sometimes be used to advantage to maintain a self-sharpening behavior in certain cutting tools. Hardened surfaces may be used with soft surfaces to keep the tool sharp by judicious use of the “rat’s-tooth principle”: The front tearing teeth...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770199
EISBN: 978-1-62708-337-9
..., it is important not to over feed into the root ( Fig. 8.7b ). In practice, the as-case-hardened gear tooth does not have exactly the same profile as the grinding wheel. Both distortion and growth occur, and the degree of difficulty of grinding without damage is increased. For standard grades of case-hardening...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... is continually exposed at the sharp tip. Source: Ref 4 Fig. 9 Self-sharpening of a digging tooth from ground-contact equipment by controlled wear through selective hardfacing. The pattern of hardfacing can be varied to suit the condition, but note that the blunt tooth is hardened on both sides, while...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050139
EISBN: 978-1-62708-311-9
.... In submerged quenching the parts may have impingement added through the use of quench rings. Finally, there are applications such as the tooth hardening of fine-pitch gears in which the parts are heated under water. The initiation of power heats the tooth sufficiently to cause a vapor pocket next to the area...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770011
EISBN: 978-1-62708-337-9
... of the Case on Carburised Alloy Steels , Met. Sci. Heat Treat. (USSR) , Vol 14 ( No. 6 ), June 1972 , p 508 – 512 10.1007/BF00648304 8. Van Thyne C. and Krauss G. , A Comparison of Single Tooth Bending Fatigue in Boron and Alloy Carburising Steels , Carburising: Processing...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... surface deterioration. This heavily loaded gear was made of case-hardened alloy steel, with a surface hardness near 60 HRC. (b) Heavily loaded final drive pinion with surface pitting near the pitch line, which was low on this gear tooth. The rippling shown is plastic deformation caused by the sliding...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220253
EISBN: 978-1-62708-341-6
... be stopped if a mislocated part, which might damage the induction coil, is present. These machines often have very high outputs–sometimes as high as several thousand parts per hour. Indexing devices also find use in tooth-by-tooth hardening of gears. Rotary tables, without indexers, also find...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120079
EISBN: 978-1-62708-269-3
... components, such as fan disks, spacers, shafts, and rotating seals. Table 10.4 Some typical machining parameters used to machine airframe bulkheads from an alpha-beta (Ti-6Al-4V) alloy Operation Part surface Cutter description and material Speed, m/min (ft/min) Feed, mm/tooth (in./tooth...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130043
EISBN: 978-1-62708-284-6
..., with resulting increases in hardenability and increased embrittlement. Underheating can cause poor mechanical properties, because there was an incomplete transformation to austenite and therefore an incomplete transformation to martensite. Poor mechanical properties, such as low tensile and yield stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130151
EISBN: 978-1-62708-284-6
... A148 Gr 105-85 Tensile strength, MPa 804 Yield strength, MPa 679 Yielding at 50 mm, % 6.0 Reduction in area, % 10.0 Impact, J 30–35 Hardness, HB 257–259 The fracture, as can be observed, occurred from the bottom of the tooth, propagating toward the internal diameter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440283
EISBN: 978-1-62708-262-4
... hardness, effective case depth, and core hardness. The test pin diameter chosen was based on the gear tooth thickness and the fact that the test pin center cooling rate would be on the steeper portion of the Jominy hardenability curve. This meant that monitoring the center core hardness of the test pins...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770077
EISBN: 978-1-62708-337-9
... of Retained Austenite on Propagation of Fatigue Cracks in Carburised Cases of Toothed Elements , Heat Treatment ’84 , The Metals Society , p 39.1 – 39.9 9. Vasil’ev L.A. , Retained Austenite and Hardness of the Carburised Case on Steel 18Kh2N4VA after Quenching in Two Different Media , Met...